Add parsing for type aliases

test/mjsunit/harmony/typesystem/type-aliases.js

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-types
+
+
+load("test/mjsunit/harmony/typesystem/typegen.js");
+
+
+// In all the following functions, the size parameter (positive integer)
+// denotes how many test cases will be tried.  The variable test_size
+// controls execution time of this test.  It should not be too high.
+let test_size = 1000;
+
+
+function ValidTypeAliases(size) {
+  return Generate(size, [
+    new TestGen(1, ValidTypes, [
+      t => "type T = " + t,
+      t => "type T<A> = " + t,
+      t => "type T<A, B> = " + t,
+      t => "type T<A extends {x: number}, B> = " + t
+    ])
+  ]);
+}
+
+function InvalidTypeAliases(size) {
+  return Generate(size, [
+    new TestGen(1, InvalidTypes, [
+      t => "type T = " + t,
+      t => "type T<A> = " + t,
+      t => "type T<A, B> = " + t,
+      t => "type T<A extends {x: number}, B> = " + t
+    ]),
+    "type T<> = number",
+    "type T",
+    "type T ="
+  ]);
+}
+
+(function TestTypeAliases(size) {
+  Test(size, [
+    new TestGen(3, ValidTypeAliases, [CheckValid]),
+    new TestGen(1, InvalidTypeAliases, [CheckInvalid]),
+  ]);
+  CheckValid("var type; type");
+  CheckValid("var type, number=10; type = number+1");
+  CheckValid("function type() {}; type(1, 2, 3)");
+  CheckValid("var type; type\n42");
+})(test_size);