client/test: add test for --offline behavior

Currently, only "add" and negative cases are tested. Testing "modify"
would require an ability to provide input. Perhaps at some later point.

Makefile.am

@@ -5318,6 +5318,7 @@ EXTRA_DIST += \
 	src/tests/client/test-client.check-on-disk/test_002.expected \
 	src/tests/client/test-client.check-on-disk/test_003.expected \
 	src/tests/client/test-client.check-on-disk/test_004.expected \
+	src/tests/client/test-client.check-on-disk/test_offline.expected \
 	\
 	src/tests/client/meson.build \
 	$(NULL)

src/tests/client/test-client.check-on-disk/test_offline.expected

@@ -0,0 +1,137 @@
+size: 258
+location: src/tests/client/test-client.py:test_offline()/1
+cmd: $NMCLI g
+lang: C
+returncode: 1
+stderr: 136 bytes
+>>>
+Error: Could not create NMClient object: Key/Value pair 0, ?invalid?, in address element ?very:invalid? does not contain an equal sign.
+
+<<<
+size: 319
+location: src/tests/client/test-client.py:test_offline()/2
+cmd: $NMCLI --offline c add type ethernet
+lang: C
+returncode: 0
+stdout: 169 bytes
+>>>
+[connection]
+id=ethernet
+uuid=UUID-WAS-HERE-BUT-IS-NO-MORE-SADLY
+type=ethernet
+
+[ethernet]
+
+[ipv4]
+method=auto
+
+[ipv6]
+addr-gen-mode=stable-privacy
+method=auto
+
+[proxy]
+
+<<<
+size: 183
+location: src/tests/client/test-client.py:test_offline()/3
+cmd: $NMCLI --offline c show
+lang: C
+returncode: 2
+stderr: 47 bytes
+>>>
+Error: command doesn't support --offline mode.
+
+<<<
+size: 178
+location: src/tests/client/test-client.py:test_offline()/4
+cmd: $NMCLI --offline g
+lang: C
+returncode: 2
+stderr: 47 bytes
+>>>
+Error: command doesn't support --offline mode.
+
+<<<
+size: 176
+location: src/tests/client/test-client.py:test_offline()/5
+cmd: $NMCLI --offline
+lang: C
+returncode: 2
+stderr: 47 bytes
+>>>
+Error: command doesn't support --offline mode.
+
+<<<
+size: 443
+location: src/tests/client/test-client.py:test_offline()/6
+cmd: $NMCLI --offline c add type wifi ssid lala 802-1x.eap pwd 802-1x.identity foo 802-1x.password bar
+lang: C
+returncode: 0
+stdout: 232 bytes
+>>>
+[connection]
+id=wifi
+uuid=UUID-WAS-HERE-BUT-IS-NO-MORE-SADLY
+type=wifi
+
+[wifi]
+mode=infrastructure
+ssid=lala
+
+[802-1x]
+eap=pwd;
+identity=foo
+password=bar
+
+[ipv4]
+method=auto
+
+[ipv6]
+addr-gen-mode=stable-privacy
+method=auto
+
+[proxy]
+
+<<<
+size: 481
+location: src/tests/client/test-client.py:test_offline()/7
+cmd: $NMCLI --offline c add type wifi ssid lala 802-1x.eap pwd 802-1x.identity foo 802-1x.password bar 802-1x.password-flags agent-owned
+lang: C
+returncode: 0
+stdout: 236 bytes
+>>>
+[connection]
+id=wifi
+uuid=UUID-WAS-HERE-BUT-IS-NO-MORE-SADLY
+type=wifi
+
+[wifi]
+mode=infrastructure
+ssid=lala
+
+[802-1x]
+eap=pwd;
+identity=foo
+password-flags=1
+
+[ipv4]
+method=auto
+
+[ipv6]
+addr-gen-mode=stable-privacy
+method=auto
+
+[proxy]
+
+<<<
+size: 199
+location: src/tests/client/test-client.py:test_offline()/8
+cmd: $NMCLI --complete-args --offline conn modify ipv6.ad
+lang: C
+returncode: 0
+stdout: 34 bytes
+>>>
+ipv6.addresses
+ipv6.addr-gen-mode
+
+<<<

src/tests/client/test-client.py

@@ -1695,6 +1695,97 @@ class TestNmcli(NmTestBase):
                 replace_cmd=replace_uuids,
             )
 
+    @nm_test_no_dbus
+    def test_offline(self):
+
+        # Make sure we're not using D-Bus
+        no_dbus_env = {
+            "DBUS_SYSTEM_BUS_ADDRESS": "very:invalid",
+            "DBUS_SESSION_BUS_ADDRESS": "very:invalid",
+        }
+
+        # This check just makes sure the above works and the
+        # "nmcli g" command indeed fails talking to D-Bus
+        self.call_nmcli(
+            ["g"],
+            extra_env=no_dbus_env,
+        )
+
+        replace_uuids = [
+            (
+                re.compile(b"uuid=.*"),
+                "uuid=UUID-WAS-HERE-BUT-IS-NO-MORE-SADLY",
+            )
+        ]
+
+        self.call_nmcli(
+            ["--offline", "c", "add", "type", "ethernet"],
+            extra_env=no_dbus_env,
+            replace_stdout=replace_uuids,
+        )
+
+        self.call_nmcli(
+            ["--offline", "c", "show"],
+            extra_env=no_dbus_env,
+        )
+
+        self.call_nmcli(
+            ["--offline", "g"],
+            extra_env=no_dbus_env,
+        )
+
+        self.call_nmcli(
+            ["--offline"],
+            extra_env=no_dbus_env,
+        )
+
+        self.call_nmcli(
+            [
+                "--offline",
+                "c",
+                "add",
+                "type",
+                "wifi",
+                "ssid",
+                "lala",
+                "802-1x.eap",
+                "pwd",
+                "802-1x.identity",
+                "foo",
+                "802-1x.password",
+                "bar",
+            ],
+            extra_env=no_dbus_env,
+            replace_stdout=replace_uuids,
+        )
+
+        self.call_nmcli(
+            [
+                "--offline",
+                "c",
+                "add",
+                "type",
+                "wifi",
+                "ssid",
+                "lala",
+                "802-1x.eap",
+                "pwd",
+                "802-1x.identity",
+                "foo",
+                "802-1x.password",
+                "bar",
+                "802-1x.password-flags",
+                "agent-owned",
+            ],
+            extra_env=no_dbus_env,
+            replace_stdout=replace_uuids,
+        )
+
+        self.call_nmcli(
+            ["--complete-args", "--offline", "conn", "modify", "ipv6.ad"],
+            extra_env=no_dbus_env,
+        )
+
 
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