[css-grid] Import W3C Test Suite

third_party/WebKit/LayoutTests/external/csswg-test/css-grid-1/grid-definition/support/testing-utils.js

+var TestingUtils = (function() {
+
+    function checkGridTemplateColumns(element, value) {
+        assert_in_array(getComputedStyle(element).gridTemplateColumns, value, "gridTemplateColumns");
+    }
+
+    function checkGridTemplateRows(element, value) {
+        assert_in_array(getComputedStyle(element).gridTemplateRows, value, "gridTemplateRows");
+    }
+
+    function testGridTemplateColumnsRows(gridId, columnsStyle, rowsStyle, columnsComputedValue, rowsComputedValue) {
+        test(function() {
+            var grid = document.getElementById(gridId);
+            grid.style.gridTemplateColumns = columnsStyle;
+            grid.style.gridTemplateRows = rowsStyle;
+            checkGridTemplateColumns(grid, columnsComputedValue);
+            checkGridTemplateRows(grid, rowsComputedValue);
+        }, "'" + gridId + "' with: grid-template-columns: " + columnsStyle  + "; and grid-template-rows: " + rowsStyle + ";");
+    }
+
+    function checkGridTemplateAreas(element, value) {
+        assert_in_array(getComputedStyle(element).gridTemplateAreas, value, "gridTemplateAreas");
+    }
+
+    function testGridTemplateAreas(gridId, style, value) {
+        test(function() {
+            var grid = document.getElementById(gridId);
+            grid.style.gridTemplateAreas = style;
+            checkGridTemplateAreas(grid, value);
+        }, "'" + gridId + "' with: grid-template-areas: " + style + ";");
+    }
+
+    return {
+        testGridTemplateColumnsRows: testGridTemplateColumnsRows,
+        testGridTemplateAreas: testGridTemplateAreas
+    }
+})();