Add unit test for depends_on normalization as a dict

Signed-off-by: Hedayat Vatankhah <hedayat.fwd@gmail.com>

pytests/test_normalize_depends_on.py

@@ -0,0 +1,43 @@
+import copy
+from podman_compose import normalize_service
+
+
+test_cases_simple = [
+    (
+        {"depends_on": "my_service"},
+        {"depends_on": {"my_service": {"condition": "service_started"}}},
+    ),
+    (
+        {"depends_on": ["my_service"]},
+        {"depends_on": {"my_service": {"condition": "service_started"}}},
+    ),
+    (
+        {"depends_on": ["my_service1", "my_service2"]},
+        {
+            "depends_on": {
+                "my_service1": {"condition": "service_started"},
+                "my_service2": {"condition": "service_started"},
+            },
+        },
+    ),
+    (
+        {"depends_on": {"my_service": {"condition": "service_started"}}},
+        {"depends_on": {"my_service": {"condition": "service_started"}}},
+    ),
+    (
+        {"depends_on": {"my_service": {"condition": "service_healthy"}}},
+        {"depends_on": {"my_service": {"condition": "service_healthy"}}},
+    ),
+]
+
+
+def test_normalize_service_simple():
+    for test_case, expected in copy.deepcopy(test_cases_simple):
+        test_original = copy.deepcopy(test_case)
+        test_case = normalize_service(test_case)
+        test_result = expected == test_case
+        if not test_result:
+            print("test:     ", test_original)
+            print("expected: ", expected)
+            print("actual:   ", test_case)
+        assert test_result