Migrated several tests from blink to V8 repository.

test/webkit/regexp-literals-arent-constants.js

Index: test/webkit/regexp-literals-arent-constants.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/regexp-literals-arent-constants.js
similarity index 56%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/regexp-literals-arent-constants.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..4932f7238c21b9b2792e07777abd00cdce375158 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/regexp-literals-arent-constants.js
@@ -21,11 +21,37 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 // 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."
-);
+description("This test ensures that regeular expression literals are constants, and so persist over multiple executions");
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+for (var i = 0; i < 2; i++) {
+    currentRegExp = /a/;
+    if (i)
+        shouldBeFalse("currentRegExp === lastRegExp");
+    lastRegExp = currentRegExp;
+}
 
+function test1() {
+    for (var i = 0; i < 2; i++) {
+        currentRegExp = /a/;
+        if (i)
+            shouldBeFalse("currentRegExp === lastRegExp");
+        lastRegExp = currentRegExp;
+    }
+}
+test1();
 
+function returnRegExpLiteral() { return /a/ }
+
+shouldBeFalse("returnRegExpLiteral() === returnRegExpLiteral()");
+
+function returnConditionalRegExpLiteral(first) {
+    if (first)
+        return /a/;
+    return /a/;
+}
+
+shouldBeFalse("returnConditionalRegExpLiteral(true) === returnConditionalRegExpLiteral(true)");
+shouldBeFalse("returnConditionalRegExpLiteral(false) === returnConditionalRegExpLiteral(false)");
+shouldBeFalse("returnConditionalRegExpLiteral(true) === returnConditionalRegExpLiteral(false)");
+returnRegExpLiteral().someAddedProperty = true;
+shouldBeUndefined("returnRegExpLiteral().someAddedProperty");