refactor(clippy): fix new lints (#2297)

src/modules/aws.rs

@@ -125,16 +125,15 @@ mod tests {
 
     #[test]
     #[ignore]
-    fn no_region_set() -> io::Result<()> {
+    fn no_region_set() {
         let actual = ModuleRenderer::new("aws").collect();
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn region_set() -> io::Result<()> {
+    fn region_set() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_REGION", "ap-northeast-2")
             .collect();
@@ -144,11 +143,10 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn region_set_with_alias() -> io::Result<()> {
+    fn region_set_with_alias() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_REGION", "ap-southeast-2")
             .config(toml::toml! {
@@ -159,11 +157,10 @@ mod tests {
         let expected = Some(format!("on {} ", Color::Yellow.bold().paint("☁️  (au)")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn default_region_set() -> io::Result<()> {
+    fn default_region_set() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_REGION", "ap-northeast-2")
             .env("AWS_DEFAULT_REGION", "ap-northeast-1")
@@ -174,11 +171,10 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn profile_set() -> io::Result<()> {
+    fn profile_set() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_PROFILE", "astronauts")
             .collect();
@@ -188,11 +184,10 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn profile_set_from_aws_vault() -> io::Result<()> {
+    fn profile_set_from_aws_vault() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_VAULT", "astronauts-vault")
             .env("AWS_PROFILE", "astronauts-profile")
@@ -203,11 +198,10 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn profile_and_region_set() -> io::Result<()> {
+    fn profile_and_region_set() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_PROFILE", "astronauts")
             .env("AWS_REGION", "ap-northeast-2")
@@ -218,7 +212,6 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
@@ -282,7 +275,7 @@ region = us-east-2
     }
 
     #[test]
-    fn profile_and_region_set_with_display_all() -> io::Result<()> {
+    fn profile_and_region_set_with_display_all() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_PROFILE", "astronauts")
             .env("AWS_REGION", "ap-northeast-1")
@@ -293,11 +286,10 @@ region = us-east-2
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn profile_set_with_display_all() -> io::Result<()> {
+    fn profile_set_with_display_all() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_PROFILE", "astronauts")
             .collect();
@@ -307,11 +299,10 @@ region = us-east-2
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn region_set_with_display_all() -> io::Result<()> {
+    fn region_set_with_display_all() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_REGION", "ap-northeast-1")
             .collect();
@@ -321,11 +312,10 @@ region = us-east-2
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn profile_and_region_set_with_display_region() -> io::Result<()> {
+    fn profile_and_region_set_with_display_region() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_PROFILE", "astronauts")
             .env("AWS_DEFAULT_REGION", "ap-northeast-1")
@@ -340,11 +330,10 @@ region = us-east-2
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn profile_and_region_set_with_display_profile() -> io::Result<()> {
+    fn profile_and_region_set_with_display_profile() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_PROFILE", "astronauts")
             .env("AWS_REGION", "ap-northeast-1")
@@ -359,11 +348,10 @@ region = us-east-2
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn region_set_with_display_profile() -> io::Result<()> {
+    fn region_set_with_display_profile() {
         let actual = ModuleRenderer::new("aws")
             .env("AWS_REGION", "ap-northeast-1")
             .config(toml::toml! {
@@ -374,12 +362,11 @@ region = us-east-2
         let expected = Some(format!("on {} ", Color::Yellow.bold().paint("☁️  ")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
     #[ignore]
-    fn region_not_set_with_display_region() -> io::Result<()> {
+    fn region_not_set_with_display_region() {
         let actual = ModuleRenderer::new("aws")
             .config(toml::toml! {
                 [aws]
@@ -389,6 +376,5 @@ region = us-east-2
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 }

src/modules/character.rs

@@ -74,10 +74,9 @@ mod test {
     use crate::context::Shell;
     use crate::test::ModuleRenderer;
     use ansi_term::Color;
-    use std::io;
 
     #[test]
-    fn success_status() -> io::Result<()> {
+    fn success_status() {
         let expected = Some(format!("{} ", Color::Green.bold().paint("❯")));
 
         // Status code 0
@@ -87,12 +86,10 @@ mod test {
         // No status code
         let actual = ModuleRenderer::new("character").collect();
         assert_eq!(expected, actual);
-
-        Ok(())
     }
 
     #[test]
-    fn failure_status() -> io::Result<()> {
+    fn failure_status() {
         let expected = Some(format!("{} ", Color::Red.bold().paint("❯")));
 
         let exit_values = [1, 54321, -5000];
@@ -101,12 +98,10 @@ mod test {
             let actual = ModuleRenderer::new("character").status(*status).collect();
             assert_eq!(expected, actual);
         }
-
-        Ok(())
     }
 
     #[test]
-    fn custom_symbol() -> io::Result<()> {
+    fn custom_symbol() {
         let expected_fail = Some(format!("{} ", Color::Red.bold().paint("✖")));
         let expected_success = Some(format!("{} ", Color::Green.bold().paint("➜")));
 
@@ -135,12 +130,10 @@ mod test {
             .status(0)
             .collect();
         assert_eq!(expected_success, actual);
-
-        Ok(())
     }
 
     #[test]
-    fn zsh_keymap() -> io::Result<()> {
+    fn zsh_keymap() {
         let expected_vicmd = Some(format!("{} ", Color::Green.bold().paint("❮")));
         let expected_specified = Some(format!("{} ", Color::Green.bold().paint("V")));
         let expected_other = Some(format!("{} ", Color::Green.bold().paint("❯")));
@@ -169,12 +162,10 @@ mod test {
             .keymap("visual")
             .collect();
         assert_eq!(expected_other, actual);
-
-        Ok(())
     }
 
     #[test]
-    fn fish_keymap() -> io::Result<()> {
+    fn fish_keymap() {
         let expected_vicmd = Some(format!("{} ", Color::Green.bold().paint("❮")));
         let expected_specified = Some(format!("{} ", Color::Green.bold().paint("V")));
         let expected_other = Some(format!("{} ", Color::Green.bold().paint("❯")));
@@ -203,7 +194,5 @@ mod test {
             .keymap("visual")
             .collect();
         assert_eq!(expected_other, actual);
-
-        Ok(())
     }
 }

src/modules/cmd_duration.rs

@@ -128,7 +128,6 @@ mod tests {
     use super::*;
     use crate::test::ModuleRenderer;
     use ansi_term::Color;
-    use std::io;
 
     #[test]
     fn test_500ms() {
@@ -152,29 +151,27 @@ mod tests {
     }
 
     #[test]
-    fn config_blank_duration_1s() -> io::Result<()> {
+    fn config_blank_duration_1s() {
         let actual = ModuleRenderer::new("cmd_duration")
             .cmd_duration(1000)
             .collect();
 
         let expected = None;
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_blank_duration_5s() -> io::Result<()> {
+    fn config_blank_duration_5s() {
         let actual = ModuleRenderer::new("cmd_duration")
             .cmd_duration(5000)
             .collect();
 
         let expected = Some(format!("took {} ", Color::Yellow.bold().paint("5s")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_5s_duration_3s() -> io::Result<()> {
+    fn config_5s_duration_3s() {
         let actual = ModuleRenderer::new("cmd_duration")
             .config(toml::toml! {
                 [cmd_duration]
@@ -185,11 +182,10 @@ mod tests {
 
         let expected = None;
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_5s_duration_10s() -> io::Result<()> {
+    fn config_5s_duration_10s() {
         let actual = ModuleRenderer::new("cmd_duration")
             .config(toml::toml! {
                 [cmd_duration]
@@ -200,11 +196,10 @@ mod tests {
 
         let expected = Some(format!("took {} ", Color::Yellow.bold().paint("10s")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_1s_duration_prefix_underwent() -> io::Result<()> {
+    fn config_1s_duration_prefix_underwent() {
         let actual = ModuleRenderer::new("cmd_duration")
             .config(toml::toml! {
                 [cmd_duration]
@@ -215,11 +210,10 @@ mod tests {
 
         let expected = None;
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_5s_duration_prefix_underwent() -> io::Result<()> {
+    fn config_5s_duration_prefix_underwent() {
         let actual = ModuleRenderer::new("cmd_duration")
             .config(toml::toml! {
                 [cmd_duration]
@@ -230,6 +224,5 @@ mod tests {
 
         let expected = Some(format!("underwent {} ", Color::Yellow.bold().paint("5s")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 }

src/modules/conda.rs

@@ -57,20 +57,18 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 mod tests {
     use crate::test::ModuleRenderer;
     use ansi_term::Color;
-    use std::io;
 
     #[test]
-    fn not_in_env() -> io::Result<()> {
+    fn not_in_env() {
         let actual = ModuleRenderer::new("conda").collect();
 
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn ignore_base() -> io::Result<()> {
+    fn ignore_base() {
         let actual = ModuleRenderer::new("conda")
             .env("CONDA_DEFAULT_ENV", "base")
             .config(toml::toml! {
@@ -82,11 +80,10 @@ mod tests {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn env_set() -> io::Result<()> {
+    fn env_set() {
         let actual = ModuleRenderer::new("conda")
             .env("CONDA_DEFAULT_ENV", "astronauts")
             .collect();
@@ -97,11 +94,10 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn truncate() -> io::Result<()> {
+    fn truncate() {
         let actual = ModuleRenderer::new("conda")
             .env("CONDA_DEFAULT_ENV", "/some/really/long/and/really/annoying/path/that/shouldnt/be/displayed/fully/conda/my_env")
             .collect();
@@ -109,6 +105,5 @@ mod tests {
         let expected = Some(format!("via {} ", Color::Green.bold().paint("🅒 my_env")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 }

src/modules/directory.rs

@@ -515,7 +515,7 @@ mod tests {
         }
 
         #[test]
-        fn directory_in_root() -> io::Result<()> {
+        fn directory_in_root() {
             let actual = ModuleRenderer::new("directory").path("/etc").collect();
             let expected = Some(format!(
                 "{}{} ",
@@ -524,23 +524,21 @@ mod tests {
             ));
 
             assert_eq!(expected, actual);
-            Ok(())
         }
     }
 
     #[test]
-    fn home_directory_default_home_symbol() -> io::Result<()> {
+    fn home_directory_default_home_symbol() {
         let actual = ModuleRenderer::new("directory")
             .path(home_dir().unwrap())
             .collect();
         let expected = Some(format!("{} ", Color::Cyan.bold().paint("~")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn home_directory_custom_home_symbol() -> io::Result<()> {
+    fn home_directory_custom_home_symbol() {
         let actual = ModuleRenderer::new("directory")
             .path(home_dir().unwrap())
             .config(toml::toml! {
@@ -551,11 +549,10 @@ mod tests {
         let expected = Some(format!("{} ", Color::Cyan.bold().paint("🚀")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn home_directory_custom_home_symbol_subdirectories() -> io::Result<()> {
+    fn home_directory_custom_home_symbol_subdirectories() {
         let actual = ModuleRenderer::new("directory")
             .path(home_dir().unwrap().join("path/subpath"))
             .config(toml::toml! {
@@ -566,11 +563,10 @@ mod tests {
         let expected = Some(format!("{} ", Color::Cyan.bold().paint("🚀/path/subpath")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn substituted_truncated_path() -> io::Result<()> {
+    fn substituted_truncated_path() {
         let actual = ModuleRenderer::new("directory")
             .path("/some/long/network/path/workspace/a/b/c/dev")
             .config(toml::toml! {
@@ -587,11 +583,10 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn substitution_order() -> io::Result<()> {
+    fn substitution_order() {
         let actual = ModuleRenderer::new("directory")
             .path("/path/to/sub")
             .config(toml::toml! {
@@ -603,11 +598,10 @@ mod tests {
         let expected = Some(format!("{} ", Color::Cyan.bold().paint("/correct/order")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn strange_substitution() -> io::Result<()> {
+    fn strange_substitution() {
         let strange_sub = "/\\/;,!";
         let actual = ModuleRenderer::new("directory")
             .path("/foo/bar/regular/path")
@@ -627,7 +621,6 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
@@ -690,7 +683,7 @@ mod tests {
     }
 
     #[test]
-    fn root_directory() -> io::Result<()> {
+    fn root_directory() {
         let actual = ModuleRenderer::new("directory").path("/").collect();
         #[cfg(not(target_os = "windows"))]
         let expected = Some(format!(
@@ -702,7 +695,6 @@ mod tests {
         let expected = Some(format!("{} ", Color::Cyan.bold().paint("/")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
@@ -1234,7 +1226,7 @@ mod tests {
     }
 
     #[test]
-    fn truncation_symbol_truncated_root() -> io::Result<()> {
+    fn truncation_symbol_truncated_root() {
         let actual = ModuleRenderer::new("directory")
             .config(toml::toml! {
                 [directory]
@@ -1248,11 +1240,10 @@ mod tests {
             Color::Cyan.bold().paint("…/four/element/path")
         ));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn truncation_symbol_not_truncated_root() -> io::Result<()> {
+    fn truncation_symbol_not_truncated_root() {
         let actual = ModuleRenderer::new("directory")
             .config(toml::toml! {
                 [directory]
@@ -1266,7 +1257,6 @@ mod tests {
             Color::Cyan.bold().paint("/a/four/element/path")
         ));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
@@ -1362,7 +1352,7 @@ mod tests {
 
     #[test]
     #[cfg(target_os = "windows")]
-    fn truncation_symbol_windows_root_not_truncated() -> io::Result<()> {
+    fn truncation_symbol_windows_root_not_truncated() {
         let dir = Path::new("C:\\temp");
         let actual = ModuleRenderer::new("directory")
             .config(toml::toml! {
@@ -1374,12 +1364,11 @@ mod tests {
             .collect();
         let expected = Some(format!("{} ", Color::Cyan.bold().paint("C:/temp")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
     #[cfg(target_os = "windows")]
-    fn truncation_symbol_windows_root_truncated() -> io::Result<()> {
+    fn truncation_symbol_windows_root_truncated() {
         let dir = Path::new("C:\\temp");
         let actual = ModuleRenderer::new("directory")
             .config(toml::toml! {
@@ -1391,12 +1380,11 @@ mod tests {
             .collect();
         let expected = Some(format!("{} ", Color::Cyan.bold().paint("…/temp")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
     #[cfg(target_os = "windows")]
-    fn truncation_symbol_windows_root_truncated_backslash() -> io::Result<()> {
+    fn truncation_symbol_windows_root_truncated_backslash() {
         let dir = Path::new("C:\\temp");
         let actual = ModuleRenderer::new("directory")
             .config(toml::toml! {
@@ -1408,7 +1396,6 @@ mod tests {
             .collect();
         let expected = Some(format!("{} ", Color::Cyan.bold().paint("…\\temp")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]

src/modules/dotnet.rs

@@ -366,7 +366,7 @@ mod tests {
     #[test]
     fn shows_nothing_in_directory_with_zero_relevant_files() -> io::Result<()> {
         let workspace = create_workspace(false)?;
-        expect_output(&workspace.path(), None)?;
+        expect_output(&workspace.path(), None);
         workspace.close()
     }
 
@@ -377,7 +377,7 @@ mod tests {
         expect_output(
             &workspace.path(),
             Some(format!("{}", Color::Blue.bold().paint("•NET v3.1.103 "))),
-        )?;
+        );
         workspace.close()
     }
 
@@ -388,7 +388,7 @@ mod tests {
         expect_output(
             &workspace.path(),
             Some(format!("{}", Color::Blue.bold().paint("•NET v3.1.103 "))),
-        )?;
+        );
         workspace.close()
     }
 
@@ -399,7 +399,7 @@ mod tests {
         expect_output(
             &workspace.path(),
             Some(format!("{}", Color::Blue.bold().paint("•NET v3.1.103 "))),
-        )?;
+        );
         workspace.close()
     }
 
@@ -410,7 +410,7 @@ mod tests {
         expect_output(
             &workspace.path(),
             Some(format!("{}", Color::Blue.bold().paint("•NET v3.1.103 "))),
-        )?;
+        );
         workspace.close()
     }
 
@@ -425,7 +425,7 @@ mod tests {
                 "{}",
                 Color::Blue.bold().paint("•NET v3.1.103 🎯 netstandard2.0 ")
             )),
-        )?;
+        );
         workspace.close()
     }
 
@@ -436,7 +436,7 @@ mod tests {
         expect_output(
             &workspace.path(),
             Some(format!("{}", Color::Blue.bold().paint("•NET v3.1.103 "))),
-        )?;
+        );
         workspace.close()
     }
 
@@ -447,7 +447,7 @@ mod tests {
         expect_output(
             &workspace.path(),
             Some(format!("{}", Color::Blue.bold().paint("•NET v3.1.103 "))),
-        )?;
+        );
         workspace.close()
     }
 
@@ -458,7 +458,7 @@ mod tests {
         expect_output(
             &workspace.path(),
             Some(format!("{}", Color::Blue.bold().paint("•NET v3.1.103 "))),
-        )?;
+        );
         workspace.close()
     }
 
@@ -470,7 +470,7 @@ mod tests {
         expect_output(
             &workspace.path(),
             Some(format!("{}", Color::Blue.bold().paint("•NET v1.2.3 "))),
-        )?;
+        );
         workspace.close()
     }
 
@@ -487,7 +487,7 @@ mod tests {
                 "{}",
                 Color::Blue.bold().paint("•NET v1.2.3 🎯 netstandard2.0 ")
             )),
-        )?;
+        );
         workspace.close()
     }
 
@@ -508,7 +508,7 @@ mod tests {
                 "{}",
                 Color::Blue.bold().paint("•NET v1.2.3 🎯 netstandard2.0 ")
             )),
-        )?;
+        );
         workspace.close()
     }
 
@@ -523,7 +523,7 @@ mod tests {
                 "{}",
                 Color::Blue.bold().paint("•NET v3.1.103 🎯 netstandard2.0 ")
             )),
-        )?;
+        );
         workspace.close()
     }
 
@@ -540,7 +540,7 @@ mod tests {
                     .bold()
                     .paint("•NET v3.1.103 🎯 netstandard2.0;net461 ")
             )),
-        )?;
+        );
         workspace.close()
     }
 
@@ -602,12 +602,10 @@ mod tests {
             .replace("TFM_VALUE", tfm)
     }
 
-    fn expect_output(dir: &Path, expected: Option<String>) -> io::Result<()> {
+    fn expect_output(dir: &Path, expected: Option<String>) {
         let actual = ModuleRenderer::new("dotnet").path(dir).collect();
 
         assert_eq!(actual, expected);
-
-        Ok(())
     }
 
     #[test]

src/modules/env_var.rs

@@ -54,12 +54,11 @@ fn get_env_value(context: &Context, name: &str, default: Option<&str>) -> Option
 mod test {
     use crate::test::ModuleRenderer;
     use ansi_term::{Color, Style};
-    use std::io;
 
     const TEST_VAR_VALUE: &str = "astronauts";
 
     #[test]
-    fn empty_config() -> io::Result<()> {
+    fn empty_config() {
         let actual = ModuleRenderer::new("env_var")
             .config(toml::toml! {
                 [env_var]
@@ -68,11 +67,10 @@ mod test {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn defined_variable() -> io::Result<()> {
+    fn defined_variable() {
         let actual = ModuleRenderer::new("env_var")
             .config(toml::toml! {
                 [env_var]
@@ -83,11 +81,10 @@ mod test {
         let expected = Some(format!("with {} ", style().paint(TEST_VAR_VALUE)));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn undefined_variable() -> io::Result<()> {
+    fn undefined_variable() {
         let actual = ModuleRenderer::new("env_var")
             .config(toml::toml! {
                 [env_var]
@@ -97,11 +94,10 @@ mod test {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn default_has_no_effect() -> io::Result<()> {
+    fn default_has_no_effect() {
         let actual = ModuleRenderer::new("env_var")
             .config(toml::toml! {
                 [env_var]
@@ -113,11 +109,10 @@ mod test {
         let expected = Some(format!("with {} ", style().paint(TEST_VAR_VALUE)));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn default_takes_effect() -> io::Result<()> {
+    fn default_takes_effect() {
         let actual = ModuleRenderer::new("env_var")
             .config(toml::toml! {
                 [env_var]
@@ -128,11 +123,10 @@ mod test {
         let expected = Some(format!("with {} ", style().paint("N/A")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn symbol() -> io::Result<()> {
+    fn symbol() {
         let actual = ModuleRenderer::new("env_var")
             .config(toml::toml! {
                 [env_var]
@@ -147,11 +141,10 @@ mod test {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn prefix() -> io::Result<()> {
+    fn prefix() {
         let actual = ModuleRenderer::new("env_var")
             .config(toml::toml! {
                 [env_var]
@@ -166,11 +159,10 @@ mod test {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn suffix() -> io::Result<()> {
+    fn suffix() {
         let actual = ModuleRenderer::new("env_var")
             .config(toml::toml! {
                 [env_var]
@@ -185,7 +177,6 @@ mod test {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     fn style() -> Style {

src/modules/git_status.rs

@@ -354,6 +354,7 @@ mod tests {
         std::thread::sleep(std::time::Duration::from_millis(500));
     }
 
+    #[allow(clippy::unnecessary_wraps)]
     fn format_output(symbols: &str) -> Option<String> {
         Some(format!(
             "{} ",

src/modules/hg_branch.rs

@@ -143,7 +143,7 @@ mod tests {
                 truncation_length = 14
             }),
             &[Expect::Empty],
-        )?;
+        );
         tempdir.close()
     }
 
@@ -161,7 +161,7 @@ mod tests {
             tempdir.path(),
             None,
             &[Expect::BranchName(&"default"), Expect::NoTruncation],
-        )?;
+        );
         tempdir.close()
     }
 
@@ -169,7 +169,7 @@ mod tests {
     #[ignore]
     fn test_hg_get_branch_autodisabled() -> io::Result<()> {
         let tempdir = tempfile::tempdir()?;
-        expect_hg_branch_with_config(tempdir.path(), None, &[Expect::Empty])?;
+        expect_hg_branch_with_config(tempdir.path(), None, &[Expect::Empty]);
         tempdir.close()
     }
 
@@ -183,7 +183,7 @@ mod tests {
             &repo_dir,
             None,
             &[Expect::BranchName(&"bookmark-101"), Expect::NoTruncation],
-        )?;
+        );
         tempdir.close()
     }
 
@@ -211,7 +211,7 @@ mod tests {
                 disabled = false
             }),
             &[Expect::BranchName(&"branch-name-10")],
-        )?;
+        );
         tempdir.close()
     }
 
@@ -245,7 +245,7 @@ mod tests {
                 Expect::Symbol(&"B"),
                 Expect::TruncationSymbol(&"%"),
             ],
-        )?;
+        );
         tempdir.close()
     }
 
@@ -278,7 +278,7 @@ mod tests {
                 Expect::Style(Color::Blue.underline()),
                 Expect::TruncationSymbol(&""),
             ],
-        )?;
+        );
         tempdir.close()
     }
 
@@ -286,7 +286,7 @@ mod tests {
         repo_dir: &Path,
         config: Option<toml::Value>,
         expectations: &[Expect],
-    ) -> io::Result<()> {
+    ) {
         let actual = ModuleRenderer::new("hg_branch")
             .path(repo_dir.to_str().unwrap())
             .config(config.unwrap_or_else(|| {
@@ -306,7 +306,7 @@ mod tests {
             match expect {
                 Expect::Empty => {
                     assert_eq!(None, actual);
-                    return Ok(());
+                    return;
                 }
                 Expect::Symbol(symbol) => {
                     expect_symbol = symbol;
@@ -332,7 +332,6 @@ mod tests {
             )),
         ));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     fn run_hg(args: &[&str], repo_dir: &Path) -> io::Result<()> {

src/modules/hostname.rs

@@ -69,7 +69,6 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 mod tests {
     use crate::test::ModuleRenderer;
     use ansi_term::{Color, Style};
-    use std::io;
 
     macro_rules! get_hostname {
         () => {
@@ -80,13 +79,13 @@ mod tests {
                     "hostname was not tested because gethostname failed! \
                      This could be caused by your hostname containing invalid UTF."
                 );
-                return Ok(());
+                return;
             }
         };
     }
 
     #[test]
-    fn ssh_only_false() -> io::Result<()> {
+    fn ssh_only_false() {
         let hostname = get_hostname!();
         let actual = ModuleRenderer::new("hostname")
             .config(toml::toml! {
@@ -98,11 +97,10 @@ mod tests {
         let expected = Some(format!("{} in ", style().paint(hostname)));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn no_ssh() -> io::Result<()> {
+    fn no_ssh() {
         let actual = ModuleRenderer::new("hostname")
             .config(toml::toml! {
                 [hostname]
@@ -112,11 +110,10 @@ mod tests {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn ssh() -> io::Result<()> {
+    fn ssh() {
         let hostname = get_hostname!();
         let actual = ModuleRenderer::new("hostname")
             .config(toml::toml! {
@@ -129,11 +126,10 @@ mod tests {
         let expected = Some(format!("{} in ", style().paint(hostname)));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn no_trim_at() -> io::Result<()> {
+    fn no_trim_at() {
         let hostname = get_hostname!();
         let actual = ModuleRenderer::new("hostname")
             .config(toml::toml! {
@@ -145,11 +141,10 @@ mod tests {
         let expected = Some(format!("{} in ", style().paint(hostname)));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn trim_at() -> io::Result<()> {
+    fn trim_at() {
         let hostname = get_hostname!();
         let (remainder, trim_at) = hostname.split_at(1);
         let actual = ModuleRenderer::new("hostname")
@@ -162,7 +157,6 @@ mod tests {
         let expected = Some(format!("{} in ", style().paint(remainder)));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     fn style() -> Style {

src/modules/jobs.rs

@@ -57,37 +57,33 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 mod test {
     use crate::test::ModuleRenderer;
     use ansi_term::Color;
-    use std::io;
 
     #[test]
-    fn config_blank_job_0() -> io::Result<()> {
+    fn config_blank_job_0() {
         let actual = ModuleRenderer::new("jobs").jobs(0).collect();
 
         let expected = None;
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_blank_job_1() -> io::Result<()> {
+    fn config_blank_job_1() {
         let actual = ModuleRenderer::new("jobs").jobs(1).collect();
 
         let expected = Some(format!("{} ", Color::Blue.bold().paint("✦")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_blank_job_2() -> io::Result<()> {
+    fn config_blank_job_2() {
         let actual = ModuleRenderer::new("jobs").jobs(2).collect();
 
         let expected = Some(format!("{} ", Color::Blue.bold().paint("✦2")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_2_job_2() -> io::Result<()> {
+    fn config_2_job_2() {
         let actual = ModuleRenderer::new("jobs")
             .config(toml::toml! {
                 [jobs]
@@ -98,11 +94,10 @@ mod test {
 
         let expected = Some(format!("{} ", Color::Blue.bold().paint("✦")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_2_job_3() -> io::Result<()> {
+    fn config_2_job_3() {
         let actual = ModuleRenderer::new("jobs")
             .config(toml::toml! {
                 [jobs]
@@ -113,6 +108,5 @@ mod test {
 
         let expected = Some(format!("{} ", Color::Blue.bold().paint("✦3")));
         assert_eq!(expected, actual);
-        Ok(())
     }
 }

src/modules/line_break.rs

@@ -14,16 +14,12 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
 #[cfg(test)]
 mod test {
-    use std::io;
-
     use crate::test::ModuleRenderer;
 
     #[test]
-    fn produces_result() -> io::Result<()> {
+    fn produces_result() {
         let expected = Some(String::from("\n"));
         let actual = ModuleRenderer::new("line_break").collect();
         assert_eq!(expected, actual);
-
-        Ok(())
     }
 }

src/modules/nix_shell.rs

@@ -64,52 +64,47 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 mod tests {
     use crate::test::ModuleRenderer;
     use ansi_term::Color;
-    use std::io;
 
     #[test]
-    fn no_env_variables() -> io::Result<()> {
+    fn no_env_variables() {
         let actual = ModuleRenderer::new("nix_shell").collect();
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn invalid_env_variables() -> io::Result<()> {
+    fn invalid_env_variables() {
         let actual = ModuleRenderer::new("nix_shell")
             .env("IN_NIX_SHELL", "something_wrong")
             .collect();
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn pure_shell() -> io::Result<()> {
+    fn pure_shell() {
         let actual = ModuleRenderer::new("nix_shell")
             .env("IN_NIX_SHELL", "pure")
             .collect();
         let expected = Some(format!("via {} ", Color::Blue.bold().paint("❄️  pure")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn impure_shell() -> io::Result<()> {
+    fn impure_shell() {
         let actual = ModuleRenderer::new("nix_shell")
             .env("IN_NIX_SHELL", "impure")
             .collect();
         let expected = Some(format!("via {} ", Color::Blue.bold().paint("❄️  impure")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn pure_shell_name() -> io::Result<()> {
+    fn pure_shell_name() {
         let actual = ModuleRenderer::new("nix_shell")
             .env("IN_NIX_SHELL", "pure")
             .env("name", "starship")
@@ -120,11 +115,10 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn impure_shell_name() -> io::Result<()> {
+    fn impure_shell_name() {
         let actual = ModuleRenderer::new("nix_shell")
             .env("IN_NIX_SHELL", "impure")
             .env("name", "starship")
@@ -135,6 +129,5 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 }

src/modules/package.rs

@@ -244,7 +244,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), None)?;
+        expect_output(&project_dir, Some("v0.1.0"), None);
         project_dir.close()
     }
 
@@ -259,7 +259,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), None)?;
+        expect_output(&project_dir, Some("v0.1.0"), None);
         project_dir.close()
     }
 
@@ -273,7 +273,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -288,7 +288,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -303,7 +303,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -319,7 +319,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -339,7 +339,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), Some(starship_config))?;
+        expect_output(&project_dir, Some("v0.1.0"), Some(starship_config));
         project_dir.close()
     }
 
@@ -355,7 +355,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), None)?;
+        expect_output(&project_dir, Some("v0.1.0"), None);
         project_dir.close()
     }
 
@@ -370,7 +370,7 @@ mod tests {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -389,7 +389,7 @@ java {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), None)?;
+        expect_output(&project_dir, Some("v0.1.0"), None);
         project_dir.close()
     }
 
@@ -408,7 +408,7 @@ java {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), None)?;
+        expect_output(&project_dir, Some("v0.1.0"), None);
         project_dir.close()
     }
 
@@ -427,7 +427,7 @@ java {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0-rc1"), None)?;
+        expect_output(&project_dir, Some("v0.1.0-rc1"), None);
         project_dir.close()
     }
 
@@ -445,7 +445,7 @@ java {
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -478,7 +478,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v1.2.3"), None)?;
+        expect_output(&project_dir, Some("v1.2.3"), None);
         project_dir.close()
     }
 
@@ -489,7 +489,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v3.2.1"), None)?;
+        expect_output(&project_dir, Some("v3.2.1"), None);
         project_dir.close()
     }
 
@@ -505,7 +505,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v1.0.0-alpha.3"), None)?;
+        expect_output(&project_dir, Some("v1.0.0-alpha.3"), None);
         project_dir.close()
     }
 
@@ -521,7 +521,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.9.9-dev+20130417140000.amd64"), None)?;
+        expect_output(&project_dir, Some("v0.9.9-dev+20130417140000.amd64"), None);
         project_dir.close()
     }
 
@@ -536,7 +536,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.2.0"), None)?;
+        expect_output(&project_dir, Some("v0.2.0"), None);
         project_dir.close()
     }
 
@@ -551,7 +551,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), None)?;
+        expect_output(&project_dir, Some("v0.1.0"), None);
         project_dir.close()
     }
 
@@ -565,7 +565,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -580,7 +580,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), None)?;
+        expect_output(&project_dir, Some("v0.1.0"), None);
         project_dir.close()
     }
 
@@ -594,7 +594,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -668,7 +668,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, "pom.xml", Some(&pom))?;
-        expect_output(&project_dir, Some("0.3.20-SNAPSHOT"), None)?;
+        expect_output(&project_dir, Some("0.3.20-SNAPSHOT"), None);
         project_dir.close()
     }
 
@@ -692,7 +692,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, "pom.xml", Some(&pom))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -709,7 +709,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, "pom.xml", Some(&pom))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -730,7 +730,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, "pom.xml", Some(&pom))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -741,7 +741,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, Some("v0.1.0"), None)?;
+        expect_output(&project_dir, Some("v0.1.0"), None);
         project_dir.close()
     }
 
@@ -752,7 +752,7 @@ end";
 
         let project_dir = create_project_dir()?;
         fill_config(&project_dir, config_name, Some(&config_content))?;
-        expect_output(&project_dir, None, None)?;
+        expect_output(&project_dir, None, None);
         project_dir.close()
     }
 
@@ -770,11 +770,7 @@ end";
         file.sync_all()
     }
 
-    fn expect_output(
-        project_dir: &TempDir,
-        contains: Option<&str>,
-        config: Option<toml::Value>,
-    ) -> io::Result<()> {
+    fn expect_output(project_dir: &TempDir, contains: Option<&str>, config: Option<toml::Value>) {
         let starship_config = config.unwrap_or(toml::toml! {
             [package]
             disabled = false
@@ -795,7 +791,5 @@ end";
         } else {
             assert_eq!(actual, None);
         }
-
-        Ok(())
     }
 }

src/modules/ruby.rs

@@ -125,7 +125,7 @@ mod tests {
     }
 
     #[test]
-    fn test_format_ruby_version() -> io::Result<()> {
+    fn test_format_ruby_version() {
         assert_eq!(
             format_ruby_version("ruby 2.1.10p492 (2016-04-01 revision 54464) [x86_64-darwin19.0]"),
             Some("v2.1.10".to_string())
@@ -140,7 +140,5 @@ mod tests {
             ),
             Some("v2.7.0".to_string())
         );
-
-        Ok(())
     }
 }

src/modules/shlvl.rs

@@ -64,7 +64,6 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 #[cfg(test)]
 mod tests {
     use ansi_term::{Color, Style};
-    use std::io;
 
     use crate::test::ModuleRenderer;
 
@@ -76,7 +75,7 @@ mod tests {
     }
 
     #[test]
-    fn empty_config() -> io::Result<()> {
+    fn empty_config() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -86,11 +85,10 @@ mod tests {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn enabled() -> io::Result<()> {
+    fn enabled() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -101,11 +99,10 @@ mod tests {
         let expected = Some(format!("{} ", style().paint("↕️  2")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn no_level() -> io::Result<()> {
+    fn no_level() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -115,11 +112,10 @@ mod tests {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn enabled_config_level_1() -> io::Result<()> {
+    fn enabled_config_level_1() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -130,11 +126,10 @@ mod tests {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn lower_threshold() -> io::Result<()> {
+    fn lower_threshold() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -146,11 +141,10 @@ mod tests {
         let expected = Some(format!("{} ", style().paint("↕️  1")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn higher_threshold() -> io::Result<()> {
+    fn higher_threshold() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -162,11 +156,10 @@ mod tests {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn custom_style() -> io::Result<()> {
+    fn custom_style() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -178,11 +171,10 @@ mod tests {
         let expected = Some(format!("{} ", Color::Red.underline().paint("↕️  2")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn custom_symbol() -> io::Result<()> {
+    fn custom_symbol() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -194,11 +186,10 @@ mod tests {
         let expected = Some(format!("{} ", style().paint("shlvl is 2")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn formatting() -> io::Result<()> {
+    fn formatting() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -210,11 +201,10 @@ mod tests {
         let expected = Some(format!("↕️   going down {} GOING UP ", style().paint("2")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn repeat() -> io::Result<()> {
+    fn repeat() {
         let actual = ModuleRenderer::new("shlvl")
             .config(toml::toml! {
                 [shlvl]
@@ -228,6 +218,5 @@ mod tests {
         let expected = Some(format!("{} ", style().paint("~~~>")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 }

src/modules/singularity.rs

@@ -45,18 +45,16 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 mod tests {
     use crate::test::ModuleRenderer;
     use ansi_term::Color;
-    use std::io;
 
     #[test]
-    fn no_env_set() -> io::Result<()> {
+    fn no_env_set() {
         let actual = ModuleRenderer::new("singularity").collect();
 
         let expected = None;
         assert_eq!(expected, actual);
-        Ok(())
     }
     #[test]
-    fn env_set() -> io::Result<()> {
+    fn env_set() {
         let actual = ModuleRenderer::new("singularity")
             .env("SINGULARITY_NAME", "centos.img")
             .collect();
@@ -67,6 +65,5 @@ mod tests {
         ));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 }

src/modules/status.rs

@@ -147,12 +147,11 @@ fn status_signal_name(signal: SignalNumber) -> Option<&'static str> {
 #[cfg(test)]
 mod tests {
     use ansi_term::Color;
-    use std::io;
 
     use crate::test::ModuleRenderer;
 
     #[test]
-    fn success_status() -> io::Result<()> {
+    fn success_status() {
         let expected = None;
 
         // Status code 0
@@ -173,21 +172,18 @@ mod tests {
             })
             .collect();
         assert_eq!(expected, actual);
-
-        Ok(())
     }
 
     #[test]
-    fn not_enabled() -> io::Result<()> {
+    fn not_enabled() {
         let expected = None;
 
         let actual = ModuleRenderer::new("status").status(1).collect();
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn failure_status() -> io::Result<()> {
+    fn failure_status() {
         let exit_values = [1, 2, 130];
 
         for status in exit_values.iter() {
@@ -205,12 +201,10 @@ mod tests {
                 .collect();
             assert_eq!(expected, actual);
         }
-
-        Ok(())
     }
 
     #[test]
-    fn signal_name() -> io::Result<()> {
+    fn signal_name() {
         let exit_values = [1, 2, 126, 127, 130, 101];
         let exit_values_name = [
             Some("ERROR"),
@@ -233,12 +227,10 @@ mod tests {
                 .collect();
             assert_eq!(expected, actual);
         }
-
-        Ok(())
     }
 
     #[test]
-    fn exit_code_name_no_signal() -> io::Result<()> {
+    fn exit_code_name_no_signal() {
         let exit_values = [1, 2, 126, 127, 130, 101, 132];
         let exit_values_name = [
             Some("ERROR"),
@@ -263,12 +255,10 @@ mod tests {
                 .collect();
             assert_eq!(expected, actual);
         }
-
-        Ok(())
     }
 
     #[test]
-    fn maybe_exit_code_number() -> io::Result<()> {
+    fn maybe_exit_code_number() {
         let exit_values = [1, 2, 126, 127, 130, 101, 6, -3];
         let exit_values_name = [
             None,
@@ -293,12 +283,10 @@ mod tests {
                 .collect();
             assert_eq!(expected, actual);
         }
-
-        Ok(())
     }
 
     #[test]
-    fn special_symbols() -> io::Result<()> {
+    fn special_symbols() {
         let exit_values = [1, 126, 127, 130, 131];
         let exit_values_name = ["🔴", "🚫", "🔍", "🧱", "⚡"];
 
@@ -321,12 +309,10 @@ mod tests {
                 .collect();
             assert_eq!(expected, actual);
         }
-
-        Ok(())
     }
 
     #[test]
-    fn special_symbols_no_signals() -> io::Result<()> {
+    fn special_symbols_no_signals() {
         let exit_values = [1, 126, 127, 130, 131];
         let exit_values_name = ["🔴", "🚫", "🔍", "🔴", "🔴"];
 
@@ -349,7 +335,5 @@ mod tests {
                 .collect();
             assert_eq!(expected, actual);
         }
-
-        Ok(())
     }
 }

src/modules/time.rs

@@ -155,7 +155,6 @@ mod tests {
     use super::*;
     use crate::test::ModuleRenderer;
     use chrono::offset::TimeZone;
-    use std::io;
 
     const FMT_12: &str = "%r";
     const FMT_24: &str = "%T";
@@ -470,7 +469,7 @@ mod tests {
     }
 
     #[test]
-    fn config_enabled() -> io::Result<()> {
+    fn config_enabled() {
         let actual = ModuleRenderer::new("time")
             .config(toml::toml! {
                 [time]
@@ -480,20 +479,18 @@ mod tests {
 
         // We can't test what it actually is...but we can assert that it is something
         assert!(actual.is_some());
-        Ok(())
     }
 
     #[test]
-    fn config_blank() -> io::Result<()> {
+    fn config_blank() {
         let actual = ModuleRenderer::new("time").collect();
 
         let expected = None;
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn config_check_prefix_and_suffix() -> io::Result<()> {
+    fn config_check_prefix_and_suffix() {
         let actual = ModuleRenderer::new("time")
             .config(toml::toml! {
                 [time]
@@ -512,6 +509,5 @@ mod tests {
 
         assert!(actual.starts_with(&col_prefix));
         assert!(actual.ends_with(&col_suffix));
-        Ok(())
     }
 }

src/modules/username.rs

@@ -79,33 +79,30 @@ fn is_ssh_connection(context: &Context) -> bool {
 mod tests {
     use crate::test::ModuleRenderer;
     use ansi_term::Color;
-    use std::io;
 
     // TODO: Add tests for if root user (UID == 0)
     // Requires mocking
 
     #[test]
-    fn no_env_variables() -> io::Result<()> {
+    fn no_env_variables() {
         let actual = ModuleRenderer::new("username").collect();
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn no_logname_env_variable() -> io::Result<()> {
+    fn no_logname_env_variable() {
         let actual = ModuleRenderer::new("username")
             .env(super::USERNAME_ENV_VAR, "astronaut")
             .collect();
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn logname_equals_user() -> io::Result<()> {
+    fn logname_equals_user() {
         let actual = ModuleRenderer::new("username")
             .env("LOGNAME", "astronaut")
             .env(super::USERNAME_ENV_VAR, "astronaut")
@@ -113,11 +110,10 @@ mod tests {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn ssh_wo_username() -> io::Result<()> {
+    fn ssh_wo_username() {
         // SSH connection w/o username
         let actual = ModuleRenderer::new("username")
             .env("SSH_CONNECTION", "192.168.223.17 36673 192.168.223.229 22")
@@ -125,11 +121,10 @@ mod tests {
         let expected = None;
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn current_user_not_logname() -> io::Result<()> {
+    fn current_user_not_logname() {
         let actual = ModuleRenderer::new("username")
             .env("LOGNAME", "astronaut")
             .env(super::USERNAME_ENV_VAR, "cosmonaut")
@@ -137,11 +132,10 @@ mod tests {
         let expected = Some(format!("{} in ", Color::Yellow.bold().paint("cosmonaut")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn ssh_connection() -> io::Result<()> {
+    fn ssh_connection() {
         let actual = ModuleRenderer::new("username")
             .env(super::USERNAME_ENV_VAR, "astronaut")
             .env("SSH_CONNECTION", "192.168.223.17 36673 192.168.223.229 22")
@@ -149,11 +143,10 @@ mod tests {
         let expected = Some(format!("{} in ", Color::Yellow.bold().paint("astronaut")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn ssh_connection_tty() -> io::Result<()> {
+    fn ssh_connection_tty() {
         let actual = ModuleRenderer::new("username")
             .env(super::USERNAME_ENV_VAR, "astronaut")
             .env("SSH_TTY", "/dev/pts/0")
@@ -161,11 +154,10 @@ mod tests {
         let expected = Some(format!("{} in ", Color::Yellow.bold().paint("astronaut")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn ssh_connection_client() -> io::Result<()> {
+    fn ssh_connection_client() {
         let actual = ModuleRenderer::new("username")
             .env(super::USERNAME_ENV_VAR, "astronaut")
             .env("SSH_CLIENT", "192.168.0.101 39323 22")
@@ -173,11 +165,10 @@ mod tests {
         let expected = Some(format!("{} in ", Color::Yellow.bold().paint("astronaut")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 
     #[test]
-    fn show_always() -> io::Result<()> {
+    fn show_always() {
         let actual = ModuleRenderer::new("username")
             .env(super::USERNAME_ENV_VAR, "astronaut")
             .config(toml::toml! {
@@ -188,6 +179,5 @@ mod tests {
         let expected = Some(format!("{} in ", Color::Yellow.bold().paint("astronaut")));
 
         assert_eq!(expected, actual);
-        Ok(())
     }
 }