Migrate more tests from blink repository.

test/webkit/fast/regex/constructor.js

Index: test/webkit/fast/regex/constructor.js
diff --git a/test/webkit/dfg-add-not-number.js b/test/webkit/fast/regex/constructor.js
similarity index 86%
copy from test/webkit/dfg-add-not-number.js
copy to test/webkit/fast/regex/constructor.js
index df6dcdf2ef2b3c08e57020a17f9d3992c8ca95d3..9d352452868215d502dd3d2d18cc955d09f9d69f 100644
--- a/test/webkit/dfg-add-not-number.js
+++ b/test/webkit/fast/regex/constructor.js
@@ -21,15 +21,12 @@
 // (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 that adding things that aren't numbers using ++ does not crash or generate bogus code."
-);
+description("This test checks use of the regexp constructor.");
 
-function foo(a) {
-    a++;
-    return a;
-}
+var re = /abc/;
 
-for (var i = 0; i < 100; ++i)
-    shouldBe("foo(\"foo\" + i)", "NaN");
+shouldBeTrue("re === RegExp(re)");
+shouldBeTrue("re !== new RegExp(re)");
+shouldThrow("re === RegExp(re,'i')");
+shouldThrow("re !== new RegExp(re,'i')");