deno/std/flags/unknown_test.ts

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../testing/asserts.ts";
import { parse } from "./mod.ts";

Deno.test("booleanAndAliasIsNotUnknown", function (): void {
  const unknown: unknown[] = [];
  function unknownFn(arg: string, k?: string, v?: unknown): boolean {
    unknown.push({ arg, k, v });
    return false;
  }
  const aliased = ["-h", "true", "--derp", "true"];
  const regular = ["--herp", "true", "-d", "false"];
  const opts = {
    alias: { h: "herp" },
    boolean: "h",
    unknown: unknownFn,
  };
  parse(aliased, opts);
  parse(regular, opts);

  assertEquals(unknown, [
    { arg: "--derp", k: "derp", v: "true" },
    { arg: "-d", k: "d", v: "false" },
  ]);
});

Deno.test(
  "flagBooleanTrueAnyDoubleHyphenArgumentIsNotUnknown",
  function (): void {
    const unknown: unknown[] = [];
    function unknownFn(arg: string, k?: string, v?: unknown): boolean {
      unknown.push({ arg, k, v });
      return false;
    }
    const argv = parse(["--honk", "--tacos=good", "cow", "-p", "55"], {
      boolean: true,
      unknown: unknownFn,
    });
    assertEquals(unknown, [
      { arg: "--tacos=good", k: "tacos", v: "good" },
      { arg: "cow", k: undefined, v: undefined },
      { arg: "-p", k: "p", v: "55" },
    ]);
    assertEquals(argv, {
      honk: true,
      _: [],
    });
  }
);

Deno.test("stringAndAliasIsNotUnkown", function (): void {
  const unknown: unknown[] = [];
  function unknownFn(arg: string, k?: string, v?: unknown): boolean {
    unknown.push({ arg, k, v });
    return false;
  }
  const aliased = ["-h", "hello", "--derp", "goodbye"];
  const regular = ["--herp", "hello", "-d", "moon"];
  const opts = {
    alias: { h: "herp" },
    string: "h",
    unknown: unknownFn,
  };
  parse(aliased, opts);
  parse(regular, opts);

  assertEquals(unknown, [
    { arg: "--derp", k: "derp", v: "goodbye" },
    { arg: "-d", k: "d", v: "moon" },
  ]);
});

Deno.test("defaultAndAliasIsNotUnknown", function (): void {
  const unknown: unknown[] = [];
  function unknownFn(arg: string, k?: string, v?: unknown): boolean {
    unknown.push({ arg, k, v });
    return false;
  }
  const aliased = ["-h", "hello"];
  const regular = ["--herp", "hello"];
  const opts = {
    default: { h: "bar" },
    alias: { h: "herp" },
    unknown: unknownFn,
  };
  parse(aliased, opts);
  parse(regular, opts);

  assertEquals(unknown, []);
});

Deno.test("valueFollowingDoubleHyphenIsNotUnknown", function (): void {
  const unknown: unknown[] = [];
  function unknownFn(arg: string, k?: string, v?: unknown): boolean {
    unknown.push({ arg, k, v });
    return false;
  }
  const aliased = ["--bad", "--", "good", "arg"];
  const opts = {
    "--": true,
    unknown: unknownFn,
  };
  const argv = parse(aliased, opts);

  assertEquals(unknown, [{ arg: "--bad", k: "bad", v: true }]);
  assertEquals(argv, {
    "--": ["good", "arg"],
    _: [],
  });
});