Migrated several tests from blink to V8 repository.

test/webkit/toString-for-var-decl.js

Index: test/webkit/toString-for-var-decl.js
diff --git a/test/webkit/concat-while-having-a-bad-time.js b/test/webkit/toString-for-var-decl.js
similarity index 67%
copy from test/webkit/concat-while-having-a-bad-time.js
copy to test/webkit/toString-for-var-decl.js
index dfda1e08a0b36194b787a44ee12a9693acd8aeaf..2b4db731681c70cd66beb6d955493d138a0aa29d 100644
--- a/test/webkit/concat-while-having-a-bad-time.js
+++ b/test/webkit/toString-for-var-decl.js
@@ -22,10 +22,18 @@
 // 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."
+"This test checks for a couple of specific ways that bugs in toString() round trips have changed the meanings of functions with var declarations inside for loops."
 );
 
-Object.defineProperty(Array.prototype, 0, { writable: false });
-shouldBe("[42].concat()", "[42]");
+function f1() { for (var j = 1 in []) {}  }
+var f2 = function () { for (var j = 1; j < 10; ++j) {}  }
+var f3 = function () { for (j = 1;j < 10; ++j) {}  }
+var f4 = function () { for (var j;;) {}  }
 
+var unevalf = function(x) { return '(' + x.toString() + ')'; }
 
+shouldBe("unevalf(eval(unevalf(f1)))", "unevalf(f1)");
+shouldBe("unevalf(eval(unevalf(f2)))", "unevalf(f2)");
+shouldBe("unevalf(eval(unevalf(f3)))", "unevalf(f3)");
+shouldBe("unevalf(eval(unevalf(f4)))", "unevalf(f4)");
+shouldBe("unevalf(f2) != unevalf(f3)", "true");