Migrated several tests from blink to V8 repository.

test/webkit/dfg-string-stricteq.js

Index: test/webkit/dfg-string-stricteq.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/dfg-string-stricteq.js
similarity index 67%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/dfg-string-stricteq.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..27a809a850d35f92e0b7e38019ec1058d18876e0 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/dfg-string-stricteq.js
@@ -22,10 +22,31 @@
 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 description(
-"Tests the behavior of Array.prototype.concat while the array is having a bad time due to one of the elements we are concatenating."
+"Tests that the DFG does the right thing on strict equality for known strings."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function foo(a, b) {
+    a = a.f;
+    b = b.f;
+    var c = a.length + b.length;
+    return [c, a === b];
+}
 
+function bar(a, b) {
+    a = a.f;
+    b = b.f;
+    var c = a.length + b.length;
+    if (a === b)
+        return c + 1;
+    else
+        return c - 1;
+}
+
+for (var i = 0; i < 1000; ++i) {
+    var a = "blah" + i;
+    var b = "blah" + (1000 - i);
+    var areEqual = i == 500;
+    shouldBe("foo({f:\"" + a + "\"}, {f:\"" + b + "\"})", "[" + (a.length + b.length) + ", " + areEqual + "]");
+    shouldBe("bar({f:\"" + a + "\"}, {f:\"" + b + "\"})", "" + (areEqual ? a.length + b.length + 1 : a.length + b.length - 1));
+}