Add tests for ScenarioGroup CLI divider and percentile edge cases

Author: Евгений Блинов

tests/cli/test_scenario_group_cli.py

@@ -47,8 +47,9 @@ def test_results_separated_by_divider(self) -> None:
 
     def test_divider_between_not_after_last(self) -> None:
         proc = run_script(group_script())
+        # group_script() has 2 scenarios → exactly 1 divider between them
+        assert proc.stdout.count('---\n') == 1
         lines = proc.stdout.strip().splitlines()
-        # last line should NOT be ---
         assert lines[-1] != '---'
 
     def test_exit_code_0_by_default(self) -> None:

tests/units/test_benchmark_result.py

@@ -124,6 +124,13 @@ def test_percentile_small_number(self) -> None:
         expected = math.ceil(3 * 50 / 100)
         assert len(trimmed.durations) == expected
 
+    def test_percentile_very_small_positive(self) -> None:
+        result = make_result((1.0, 2.0, 3.0, 4.0, 5.0))
+        trimmed = result.percentile(0.001)
+        # ceil(5 * 0.001 / 100) = ceil(0.00005) = 1
+        assert len(trimmed.durations) == 1
+        assert trimmed.durations == (1.0,)
+
     def test_percentile_99(self) -> None:
         result = make_result(tuple(float(i) for i in range(1, 101)))
         trimmed = result.percentile(99)

tests/units/test_scenario_group.py

@@ -148,3 +148,11 @@ def test_run_correct_scenario_reference(self) -> None:
         results = g.run()
         assert results[0].scenario is s1
         assert results[1].scenario is s2
+
+    def test_run_warmup_different_numbers(self) -> None:
+        s1 = Scenario(lambda: None, name='a', number=3)
+        s2 = Scenario(lambda: None, name='b', number=7)
+        g = ScenarioGroup(s1, s2)
+        results = g.run(warmup=2)
+        assert len(results[0].durations) == 3
+        assert len(results[1].durations) == 7