cleanup WPT css-transitions timing-function parsing tests

Move all such tests into parsing.
Eliminate duplicate tests and manual versions of automated tests.

Change-Id: I0ef507a1832c9ce113ed1a855653af7fd22bb0b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1809508
Commit-Queue: George Steel <gtsteel@chromium.org>
Auto-Submit: George Steel <gtsteel@chromium.org>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699042}

css/css-transitions/parsing/transition-timing-function-computed.html

@@ -13,6 +13,8 @@
 <div id="target"></div>
 <script>
 test_computed_value("transition-timing-function", "linear");
+test_computed_value("transition-timing-function", "", "ease");
+test_computed_value("transition-timing-function", "initial", "ease");
 
 test_computed_value("transition-timing-function", "ease");
 test_computed_value("transition-timing-function", "ease-in");
@@ -22,7 +24,8 @@
 test_computed_value("transition-timing-function", "cubic-bezier(0, -2, 1, 3)");
 test_computed_value("transition-timing-function", "cubic-bezier(0, 0.7, 1, 1.3)");
 
-
+test_computed_value("transition-timing-function", "step-start", "steps(1, start)");
+test_computed_value("transition-timing-function", "step-end", "steps(1)");
 test_computed_value("transition-timing-function", "steps(4, start)");
 test_computed_value("transition-timing-function", "steps(2, end)", "steps(2)");
 test_computed_value("transition-timing-function", "steps(2, jump-start)");

css/css-transitions/parsing/transition-timing-function-invalid.html

@@ -14,12 +14,23 @@
 <script>
 test_invalid_value("transition-timing-function", "auto");
 test_invalid_value("transition-timing-function", "ease-in ease-out");
+
+test_invalid_value("transition-timing-function", "cubic-bezier(foobar)");
 test_invalid_value("transition-timing-function", "cubic-bezier(1, 2, 3)");
 test_invalid_value("transition-timing-function", "cubic-bezier(1, 2, 3, infinite)");
 test_invalid_value("transition-timing-function", "cubic-bezier(1, 2, 3, 4, 5)");
 test_invalid_value("transition-timing-function", "cubic-bezier(-0.1, 0.1, 0.5, 0.9)");
 test_invalid_value("transition-timing-function", "cubic-bezier(0.5, 0.1, 1.1, 0.9)");
 
+test_invalid_value("transition-timing-function", "steps(foobar)");
+test_invalid_value("transition-timing-function", "steps(3.3, end)");
+test_invalid_value("transition-timing-function", "steps(3, top)");
+test_invalid_value("transition-timing-function", "steps(-3, top)");
+test_invalid_value("transition-timing-function", "steps(0, jump-start)");
+test_invalid_value("transition-timing-function", "steps(0, jump-end)");
+test_invalid_value("transition-timing-function", "steps(0, jump-both)");
+test_invalid_value("transition-timing-function", "steps(1, jump-none)");
+
 test_invalid_value("transition-timing-function", "initial, cubic-bezier(0, -2, 1, 3)");
 test_invalid_value("transition-timing-function", "cubic-bezier(0, -2, 1, 3), initial");
 </script>

css/css-transitions/parsing/transition-timing-function-valid.html

@@ -22,6 +22,9 @@
 test_valid_value("transition-timing-function", "cubic-bezier(0, -2, 1, 3)");
 test_valid_value("transition-timing-function", "cubic-bezier(0, 0.7, 1, 1.3)");
 
+test_valid_value("transition-timing-function", "step-start", "steps(1, start)");
+test_valid_value("transition-timing-function", "step-end", "steps(1)");
+test_valid_value("transition-timing-function", "steps(4)");
 test_valid_value("transition-timing-function", "steps(4, start)");
 test_valid_value("transition-timing-function", "steps(2, end)", "steps(2)");
 test_valid_value("transition-timing-function", "steps(2, jump-start)");