Adding tests for HTMLSelect add() api

LayoutTests/fast/forms/select/select-add.html

Index: LayoutTests/fast/forms/select/select-add.html
diff --git a/LayoutTests/fast/forms/select/select-add.html b/LayoutTests/fast/forms/select/select-add.html
index 5e0a3d1a0bf6a4d9ed7303c597672c600df46bc5..15ff4b00d36e6dd785bafae590dd58b7d15a616f 100644
--- a/LayoutTests/fast/forms/select/select-add.html
+++ b/LayoutTests/fast/forms/select/select-add.html
@@ -78,6 +78,30 @@ function test(multiple) {
     shouldBeEqualToString('addOption("foo")', 'X,0,1,2');
 
     resetSelect(multiple);
+    shouldBeEqualToString('addOption("0")', 'X,0,1,2');
+
+    resetSelect(multiple);
+    shouldBeEqualToString('addOption("1")', '0,X,1,2');
+
+    resetSelect(multiple);
+    shouldBeEqualToString('addOption(false)', 'X,0,1,2');
+
+    resetSelect(multiple);
+    shouldBeEqualToString('addOption(true)', '0,X,1,2');
+
+    resetSelect(multiple);
+    shouldBeEqualToString('addOption(2147483647)', '0,1,2,X');
+
+    resetSelect(multiple);
+    shouldBeEqualToString('addOption(-2147483647)', '0,1,2,X');
+
+    resetSelect(multiple);
+    shouldBeEqualToString('addOption(2147483648)', '0,1,2,X');

[bashi, 2015/02/13 04:21:49]

Is this an expected behavior?

[shiva.jm, 2015/02/13 04:43:57]

I think as in link:
http://www.w3.org/html/wg/drafts/html/master/forms.html#dom-select-add and
https://html.spec.whatwg.org/multipage/forms.html#the-select-element, out of
range numbers should get added to the end of list( If before is omitted, null,
or a number out of range, then element will be added at the end of the list).

[bashi, 2015/02/13 04:50:29]

Per the IDL spec, I guess that a TypeError should be thrown.
http://heycam.github.io/webidl/#es-long

That said, I'm not suggesting that we should change the behavior now. I just
wanted to confirm what we are testing here.

+
+    resetSelect(multiple);
+    shouldBeEqualToString('addOption(-2147483648)', '0,1,2,X');
+
+    resetSelect(multiple);
     shouldThrow('select.add()');
     shouldThrow('select.add("foo")');
     shouldThrow('select.add("foo", 0)');
@@ -85,6 +109,8 @@ function test(multiple) {
     shouldThrow('select.add(undefined, 0)');
     shouldThrow('select.add(null)');
     shouldThrow('select.add(null, 0)');
+    shouldBeUndefined('select.add(new Option("X", "X", false, false), 0, 1)');
+    shouldBeUndefined('select.add(new Option("X", "X", false, false), select.options[0], 2)');
 
     resetSelect(multiple);
     var group = document.createElement('optgroup');