/*
 * Copyright 2008 The Closure Compiler Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.javascript.jscomp;

/**
 * Tests for {@link ClosureCodeRemoval}
 *
 * @author robbyw@google.com (Robby Walker)
 */
public class ClosureCodeRemovalTest extends CompilerTestCase {

  private static String EXTERNS = "var window;";

  public ClosureCodeRemovalTest() {
    super(EXTERNS);
  }

  public void testRemoveAbstract() {
    test("function Foo() {}; Foo.prototype.doSomething = goog.abstractMethod;",
        "function Foo() {};");
  }

  public void testRemoveMultiplySetAbstract() {
    test("function Foo() {}; Foo.prototype.doSomething = " +
        "Foo.prototype.doSomethingElse = Foo.prototype.oneMore = " +
        "goog.abstractMethod;",
        "function Foo() {};");
  }

  public void testDoNotRemoveNormal() {
    testSame("function Foo() {}; Foo.prototype.doSomething = function() {};");
  }

  public void testDoNotRemoveOverride() {
    test("function Foo() {}; Foo.prototype.doSomething = goog.abstractMethod;" +
         "function Bar() {}; goog.inherits(Bar, Foo);" +
         "Bar.prototype.doSomething = function() {}",
         "function Foo() {}; function Bar() {}; goog.inherits(Bar, Foo);" +
         "Bar.prototype.doSomething = function() {}");
  }

  public void testDoNotRemoveNonQualifiedName() {
    testSame("document.getElementById('x').y = goog.abstractMethod;");
  }

  public void testStopRemovalAtNonQualifiedName() {
    test("function Foo() {}; function Bar() {};" +
         "Foo.prototype.x = document.getElementById('x').y = Bar.prototype.x" +
         " = goog.abstractMethod;",
         "function Foo() {}; function Bar() {};" +
         "Foo.prototype.x = document.getElementById('x').y = " +
         "goog.abstractMethod;");
  }

  public void testAssertionRemoval1() {
    test("var x = goog.asserts.assert(y(), 'message');", "var x = y();");
  }

  public void testAssertionRemoval2() {
    test("goog.asserts.assert(y(), 'message');", "");
  }

  public void testAssertionRemoval3() {
    test("goog.asserts.assert();", "");
  }

  public void testAssertionRemoval4() {
    test("var x = goog.asserts.assert();", "var x = void 0;");
  }

  @Override
  protected ClosureCodeRemoval getProcessor(Compiler compiler) {
    return new ClosureCodeRemoval(compiler, true, true);
  }
}