CSS Font Loading: make FontFaceSet Setlike

third_party/WebKit/LayoutTests/fast/css/fontfaceset-set-operations.html

Index: third_party/WebKit/LayoutTests/fast/css/fontfaceset-set-operations.html
diff --git a/third_party/WebKit/LayoutTests/fast/css/fontfaceset-set-operations.html b/third_party/WebKit/LayoutTests/fast/css/fontfaceset-set-operations.html
index 48c2fa090aed9460275d69ec5cde536be9ce6831..8bae1d446b65d764e81ae933db9fef8586688351 100644
--- a/third_party/WebKit/LayoutTests/fast/css/fontfaceset-set-operations.html
+++ b/third_party/WebKit/LayoutTests/fast/css/fontfaceset-set-operations.html
@@ -20,23 +20,10 @@
 <script>
 description('Tests Set operations of FontFaceSet.');
 
-function runTests() {
-    nonCssConnectedFace = new FontFace("MyFont", "local(Arial)", {});
-
-    shouldBe('document.fonts.size', '3');
+thisArg = {};
+faces = []
 
-    thisArg = {};
-    faces = [];
-    document.fonts.forEach(function(face, faceAgain, set) {
-        if (faces.length == 0) {
-            callbackArgs = arguments;
-            thisValue = this;
-            shouldBeTrue('callbackArgs[0] === callbackArgs[1]');
-            shouldBeTrue('callbackArgs[2] === document.fonts');
-            shouldBeTrue('thisValue === thisArg');
-        }
-        faces.push(face);
-    }, thisArg);
+function checkResults() {
     shouldBe('faces.length', '3');
 
     shouldBeEqualToString('faces[0].family', 'Font1');
@@ -51,6 +38,48 @@ function runTests() {
 
     shouldThrow('document.fonts.add(faces[0])', '"InvalidModificationError: Failed to execute \'add\' on \'FontFaceSet\': Cannot add a CSS-connected FontFace."');
     shouldThrow('document.fonts.delete(faces[0])', '"InvalidModificationError: Failed to execute \'delete\' on \'FontFaceSet\': Cannot delete a CSS-connected FontFace."');
+}
+
+function callback(face, index, set) {
+    if (faces.length == 0) {
+        callbackArgs = arguments;
+        thisValue = this;
+        shouldBeType('callbackArgs[0]', 'FontFace');
+        shouldBeTrue('callbackArgs[1] === faces.length');
+        shouldBeTrue('callbackArgs[2] === document.fonts');
+        shouldBeTrue('thisValue === thisArg');
+    }
+    faces.push(face);
+}
+
+function runTests() {
+    nonCssConnectedFace = new FontFace("MyFont", "local(Arial)", {});
+
+    shouldBe('document.fonts.size', '3');
+
+    debug('check forEach');
+    document.fonts.forEach(callback, thisArg);
+    checkResults();
+
+    debug('check keys');
+    faces = [];
+    for (face of document.fonts.keys())
+        faces.push(face);
+    checkResults();
+
+    debug('check values');
+    faces = [];
+    for (face of document.fonts.values())
+        faces.push(face);
+    checkResults();
+
+    debug('check entries');
+    faces = [];
+    for (entry of document.fonts.entries()) {
+        shouldBeTrue('entry[0] === entry[1]');
+        faces.push(entry[1]);
+    }
+    checkResults();
 
     document.fonts.add(nonCssConnectedFace);
     shouldBe('document.fonts.size', '4');