pkgs/clan: Add test for clan flash list

Add a test for `clan flash list`.
This tests the basic functionality, as well as that listing actually
works.

pkgs/clan-cli/clan_cli/flash/list_test.py

@@ -0,0 +1,23 @@
+import pytest
+
+from clan_cli.tests.helpers import cli
+from clan_cli.tests.stdout import CaptureOutput
+
+
+@pytest.mark.impure
+def test_flash_list_languages(capture_output: CaptureOutput) -> None:
+    with capture_output as output:
+        cli.run(["flash", "list", "languages"])
+    assert "en_US.UTF-8" in output.out
+    assert "C" in output.out
+    languages = output.out.strip().split("\n")
+    assert len(languages) > 1
+
+
+@pytest.mark.impure
+def test_flash_list_keymaps(capture_output: CaptureOutput) -> None:
+    with capture_output as output:
+        cli.run(["flash", "list", "keymaps"])
+    assert "us" in output.out
+    keymaps = output.out.strip().split("\n")
+    assert len(keymaps) > 1