Add test for getUserConfigDir().

Signed-off-by: Felix Fontein <felix@fontein.de>

Author: felixfontein

age/keysource_test.go

@@ -386,3 +386,15 @@ func overwriteUserConfigDir(t *testing.T, path string) {
 		t.Setenv("XDG_CONFIG_HOME", path)
 	}
 }
+
+func TestUserConfigDir(t *testing.T) {
+	const dir = "/test/home/dir"
+	overwriteUserConfigDir(t, dir)
+	expectedDir := dir
+	if runtime.GOOS == "plan9" {
+		expectedDir += "/lib"
+	}
+	home, err := getUserConfigDir()
+	assert.Nil(t, err)
+	assert.Equal(t, home, dir)
+}