Migrate more tests from blink repository.

test/webkit/fast/js/caller-property.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in the
+//     documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (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(
+'This tests for caller property in functions. Only functions that are called from inside of other functions and have a parent should have this property set. Tests return true when caller is found and false when the caller is null.'
+)
+function child()
+{
+    return (child.caller !== null);
+}
+
+function parent()
+{
+    return child();
+}
+
+var childHasCallerWhenExecutingGlobalCode = (child.caller !== null);
+var childHasCallerWhenCalledWithoutParent = child();
+var childHasCallerWhenCalledFromWithinParent = parent();
+
+shouldBe('childHasCallerWhenExecutingGlobalCode', 'false');
+shouldBe('childHasCallerWhenCalledWithoutParent', 'false');
+shouldBe('childHasCallerWhenCalledFromWithinParent', 'true')
+
+// The caller property should throw in strict mode, and a non-strict function cannot use caller to reach a strict caller (see ES5.1 15.3.5.4).
+function nonStrictCallee() { return nonStrictCallee.caller; }
+function strictCallee() { "use strict"; return strictCallee.caller; }
+function nonStrictCaller(x) { return x(); }
+function strictCaller(x) { "use strict"; return x(); }
+shouldBe("nonStrictCaller(nonStrictCallee)", "nonStrictCaller");
+shouldThrow("nonStrictCaller(strictCallee)", '"TypeError: Type error"');
+shouldThrow("strictCaller(nonStrictCallee)", '"TypeError: Function.caller used to retrieve strict caller"');
+shouldThrow("strictCaller(strictCallee)", '"TypeError: Type error"');
+
+// .caller within a bound function reaches the caller, ignoring the binding.
+var boundNonStrictCallee = nonStrictCallee.bind();
+var boundStrictCallee = strictCallee.bind();
+shouldBe("nonStrictCaller(boundNonStrictCallee)", "nonStrictCaller");
+shouldThrow("nonStrictCaller(boundStrictCallee)", '"TypeError: Type error"');
+shouldThrow("strictCaller(boundNonStrictCallee)", '"TypeError: Function.caller used to retrieve strict caller"');
+shouldThrow("strictCaller(boundStrictCallee)", '"TypeError: Type error"');
+
+// Check that .caller works (or throws) as expected, over an accessor call.
+function getFooGetter(x) { return Object.getOwnPropertyDescriptor(x, 'foo').get; }
+function getFooSetter(x) { return Object.getOwnPropertyDescriptor(x, 'foo').set; }
+var nonStrictAccessor = {
+    get foo() { return getFooGetter(nonStrictAccessor).caller; },
+    set foo(x) { if (getFooSetter(nonStrictAccessor).caller !==x) throw false; }
+};
+var strictAccessor = {
+    get foo() { "use strict"; return getFooGetter(strictAccessor).caller; },
+    set foo(x) { "use strict"; if (getFooSetter(strictAccessor).caller !==x) throw false; }
+};
+function nonStrictGetter(x) { return x.foo; }
+function nonStrictSetter(x) { x.foo = nonStrictSetter; return true; }
+function strictGetter(x) { "use strict"; return x.foo; }
+function strictSetter(x) { "use strict"; x.foo = nonStrictSetter; return true; }
+shouldBe("nonStrictGetter(nonStrictAccessor)", "nonStrictGetter");
+shouldBeTrue("nonStrictSetter(nonStrictAccessor)");
+shouldThrow("nonStrictGetter(strictAccessor)", '"TypeError: Type error"');
+shouldThrow("nonStrictSetter(strictAccessor)", '"TypeError: Type error"');
+shouldThrow("strictGetter(nonStrictAccessor)", '"TypeError: Function.caller used to retrieve strict caller"');
+shouldThrow("strictSetter(nonStrictAccessor)", '"TypeError: Function.caller used to retrieve strict caller"');
+shouldThrow("strictGetter(strictAccessor)", '"TypeError: Type error"');
+shouldThrow("strictSetter(strictAccessor)", '"TypeError: Type error"');