[mutter/wip/3v1n0/run-tests-in-ci: 7/14] test-runner: Add assert_focused command

[Marco Trevisan <marcotrevi src gnome org>]

commit ef3ea0a59c253d9f27b508d13b231c9c29fec121
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Tue Nov 13 01:37:14 2018 -0600

    test-runner: Add assert_focused command
    
    This allows to verify which window should have the focus, which might not
    be the same as the top of the stack.

 src/tests/test-runner.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
---
diff --git a/src/tests/test-runner.c b/src/tests/test-runner.c
index 612d54cc5..feeb7466f 100644
--- a/src/tests/test-runner.c
+++ b/src/tests/test-runner.c
@@ -237,6 +237,38 @@ test_case_assert_stacking (TestCase *test,
   return *error == NULL;
 }
 
+static gboolean
+test_case_assert_focused (TestCase   *test,
+                          const char *expected_window,
+                          GError    **error)
+{
+  MetaDisplay *display = meta_get_display ();
+
+  if (!display->focus_window)
+    {
+      if (g_ascii_strcasecmp (expected_window, "null") != 0 &&
+          g_ascii_strcasecmp (expected_window, "none") != 0 &&
+          g_strcmp0 (expected_window, "0") != 0)
+        {
+          g_set_error (error, TEST_RUNNER_ERROR, TEST_RUNNER_ERROR_ASSERTION_FAILED,
+                       "focus: expected='%s', actual='NONE'", expected_window);
+        }
+    }
+  else
+    {
+      const char *focused = display->focus_window->title;
+      if (g_str_has_prefix (focused, "test/"))
+        focused += 5;
+
+      if (g_strcmp0 (focused, expected_window) != 0)
+        g_set_error (error, TEST_RUNNER_ERROR, TEST_RUNNER_ERROR_ASSERTION_FAILED,
+                    "stacking: expected='%s', actual='%s'",
+                    expected_window, focused);
+    }
+
+  return *error == NULL;
+}
+
 static gboolean
 test_case_check_xserver_stacking (TestCase *test,
                                   GError  **error)
@@ -523,6 +555,11 @@ test_case_do (TestCase *test,
       if (!test_case_check_xserver_stacking (test, error))
         return FALSE;
     }
+  else if (strcmp (argv[0], "assert_focused") == 0)
+    {
+      if (!test_case_assert_focused (test, argv[1], error))
+        return FALSE;
+    }
   else
     {
       BAD_COMMAND("Unknown command %s", argv[0]);