test: [TTA] add unit tests for _determine_margin -- ABSOLUTE

test/test_adjusters.py

@@ -41,3 +41,36 @@ class TestTargetTimeAdjuster(unittest.TestCase):
         self.assertEqual(tta._features_total_time(features), 10.0)
         self.assertEqual(tta._features_total_time([]), 0.0)
         self.assertIs(type(tta._features_total_time([])), float)
+
+    def test_determine_margin(self):
+        """Test the TTA can determine the target time margins
+
+        Args: time, margin, strategy (strategy in: ABSOLUTE, PERCENT)
+
+        Test:
+         - margin of zero
+         - margin of 5.0
+         - margin of 10.0
+         - margin of 100.0
+         - both ABSOLUTE and PERCENT strategies
+
+        TODO: figure out what should be done with negative margins & margins > 100.0
+        """
+
+        tta = adjusters.TargetTimeAdjuster()
+        with self.subTest("ABSOLUTE"):
+            strategy = adjusters.TargetTimeAdjuster._STRATEGY.ABSOLUTE
+            test_cases = []
+            # populate test cases with tuples of (time, margin, expected)
+            # zero margin
+            test_cases.append((60.0, 0.0, (60.0, 60.0)))
+            # margin of 5.0
+            test_cases.append((60.0, 5.0, (55.0, 65.0)))
+            # margin of 10.0
+            test_cases.append((60.0, 10.0, (50.0, 70.0)))
+            # margin of 100.0
+            test_cases.append((60.0, 100.0, (0.0, 160.0)))
+
+            # test
+            for time, margin, expected in test_cases:
+                self.assertEqual(tta._determine_margin(time, margin, strategy), expected)