Make rez-test tests cross-platform

Signed-off-by: Jean-Christophe Morin <[email protected]>

src/rez/data/tests/builds/packages/testing_obj/1.0.0/package.py

@@ -23,9 +23,14 @@ def commands():
 
 tests = {
     "check_car_ideas": {
-        "command": "[[ -z ${CAR_IDEA} ]] && exit 1 || exit 0"
+        "command": ["python", "-c", "import os; assert os.environ.get('CAR_IDEA') == 'STURDY STEERING WHEEL'"],
+        "requires": ["python"]
     },
     "move_meeting_to_noon": {
-        "command": "[[ -z ${SKIP_LUNCH} ]] && exit 1 || exit 0"
+        # We want this test to fail. SKIP_LUNCH should not be set.
+        # TODO: We should not test for failures here. Testing failures, str vs lsit commands, etc
+        # should we tested separately.
+        "command": ["python", "-c", "import os; assert os.environ.get('SKIP_LUNCH') is not None"],
+        "requires": ["python"]
     }
 }

src/rez/tests/test_test.py

@@ -53,8 +53,8 @@ def _run_tests(self, r):
         failed_test = self._get_test_result(runner, "move_meeting_to_noon")
 
         self.assertEqual(runner.test_results.num_tests, 2)
-        self.assertEqual(successful_test["status"], "success")
-        self.assertEqual(failed_test["status"], "failed")
+        self.assertEqual(successful_test["status"], "success", "check_car_ideas did not succeed")
+        self.assertEqual(failed_test["status"], "failed", "move_meeting_to_noon did not succeed")
 
     def _get_test_result(self, runner, test_name):
         return next(