/*
 * Copyright 2016 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;

import static com.google.javascript.jscomp.J2clChecksPass.J2CL_REFERENCE_EQUALITY;
import static com.google.javascript.jscomp.J2clChecksPass.REFERENCE_EQUALITY_TYPE_PATTERNS;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
public class J2clCheckPassTest extends CompilerTestCase {

  public J2clCheckPassTest() {
    super(DEFAULT_EXTERNS);
  }

  @Override
  @Before
  public void setUp() throws Exception {
    super.setUp();
    enableTypeCheck();
  }

  @Override
  protected CompilerPass getProcessor(Compiler compiler) {
    return new J2clChecksPass(compiler);
  }

  @Override
  protected Compiler createCompiler() {
    Compiler compiler = super.createCompiler();
    J2clSourceFileChecker.markToRunJ2clPasses(compiler);
    return compiler;
  }

  @Test
  public void testReferenceEquality_noWarning_other() {
    test(
        srcs(SourceFile.fromCode("java/lang/SomeClass.impl.java.js", lines(
            "/** @constructor */",
            "var SomeClass = function() {};",
            "var x = new SomeClass();",
            "var y = new SomeClass();",
            "var a = x == y;"))));
  }

  @Test
  public void testReferenceEquality_noWarning_null() {
    for (String value : REFERENCE_EQUALITY_TYPE_PATTERNS.values()) {
      test(
          srcs(SourceFile.fromCode(value, lines(
              "/** @constructor */",
              "var SomeClass = function() {};",
              "var x = new SomeClass();",
              "var a = x == null;"))));
    }
  }

  @Test
  public void testReferenceEquality_noWarning_undefined() {
    for (String value : REFERENCE_EQUALITY_TYPE_PATTERNS.values()) {
      test(
          srcs(SourceFile.fromCode(value, lines(
              "/** @constructor */",
              "var SomeClass = function() {};",
              "var x = new SomeClass();",
              "var a = x == undefined;"))));
    }
  }

  @Test
  public void testReferenceEquality_warning() {
    for (String value : REFERENCE_EQUALITY_TYPE_PATTERNS.values()) {
      test(
          srcs(SourceFile.fromCode(value, lines(
              "/** @constructor */",
              "var SomeClass = function() {};",
              "var x = new SomeClass();",
              "var y = new SomeClass();",
              "var a = x == y;"))),
          warning(J2CL_REFERENCE_EQUALITY));
    }
  }
}