Unit test for get_steps (web-platform-tests#22536)

Unit tests for the get_steps() function in stability.py covering all the branches. It increases the unit tests code coverage support by 6%.

Author: svillar

tools/wptrunner/wptrunner/tests/test_stability.py

@@ -1,6 +1,5 @@
 from .. import stability
 
-
 def test_is_inconsistent():
     assert stability.is_inconsistent({"PASS": 10}, 10) is False
     assert stability.is_inconsistent({"PASS": 9}, 10) is True
@@ -29,3 +28,40 @@ def test_find_slow_status():
         "timeout": 100}) == "FAIL"
     assert stability.find_slow_status({
         "longest_duration": {"SKIP": 0}}) is None
+
+
+def test_get_steps():
+    logger = None
+
+    steps = stability.get_steps(logger, 0, 0, [])
+    assert len(steps) == 0
+
+    steps = stability.get_steps(logger, 0, 0, [{}])
+    assert len(steps) == 0
+
+    repeat_loop = 1
+    flag_name = 'flag'
+    flag_value = 'y'
+    steps = stability.get_steps(logger, repeat_loop, 0, [
+                                {flag_name: flag_value}])
+    assert len(steps) == 1
+    assert steps[0][0] == "Running tests in a loop %d times with flags %s=%s" % (
+        repeat_loop, flag_name, flag_value)
+
+    repeat_loop = 0
+    repeat_restart = 1
+    flag_name = 'flag'
+    flag_value = 'n'
+    steps = stability.get_steps(logger, repeat_loop, repeat_restart, [
+                                {flag_name: flag_value}])
+    assert len(steps) == 1
+    assert steps[0][0] == "Running tests in a loop with restarts %d times with flags %s=%s" % (
+        repeat_restart, flag_name, flag_value)
+
+    repeat_loop = 10
+    repeat_restart = 5
+    steps = stability.get_steps(logger, repeat_loop, repeat_restart, [{}])
+    assert len(steps) == 2
+    assert steps[0][0] == "Running tests in a loop %d times" % repeat_loop
+    assert steps[1][0] == (
+        "Running tests in a loop with restarts %d times" % repeat_restart)