/*
 * Copyright 2016 The Error Prone 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.errorprone.bugpatterns;

import com.google.errorprone.CompilationTestHelper;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Unit tests for {@link JUnitAssertSameCheck} bug pattern.
 *
 * @author bhagwani@google.com (Sumit Bhagwani)
 */
@RunWith(JUnit4.class)
public class JUnitAssertSameCheckTest {
  CompilationTestHelper compilationHelper;

  @Before
  public void setUp() {
    compilationHelper = CompilationTestHelper.newInstance(JUnitAssertSameCheck.class, getClass());
  }

  @Test
  public void positiveCase() {
    compilationHelper
        .addSourceLines(
            "JUnitAssertSameCheckPositiveCase.java",
            """
package com.google.errorprone.bugpatterns.testdata;

/**
 * Positive test cases for {@link JUnitAssertSameCheck} check.
 *
 * @author bhagwani@google.com (Sumit Bhagwani)
 */
public class JUnitAssertSameCheckPositiveCase {

  public void test(Object obj) {
    // BUG: Diagnostic contains: An object is tested for reference equality to itself using JUnit
    org.junit.Assert.assertSame(obj, obj);

    // BUG: Diagnostic contains: An object is tested for reference equality to itself using JUnit
    org.junit.Assert.assertSame("message", obj, obj);

    // BUG: Diagnostic contains: An object is tested for reference equality to itself using JUnit
    junit.framework.Assert.assertSame(obj, obj);

    // BUG: Diagnostic contains: An object is tested for reference equality to itself using JUnit
    junit.framework.Assert.assertSame("message", obj, obj);
  }
}\
""")
        .doTest();
  }

  @Test
  public void negativeCase() {
    compilationHelper
        .addSourceLines(
            "JUnitAssertSameCheckNegativeCases.java",
            """
            package com.google.errorprone.bugpatterns.testdata;

            /**
             * Negative test cases for {@link JUnitAssertSameCheck} check.
             *
             * @author bhagwani@google.com (Sumit Bhagwani)
             */
            public class JUnitAssertSameCheckNegativeCases {

              public void test(Object obj1, Object obj2) {
                org.junit.Assert.assertSame(obj1, obj2);
                org.junit.Assert.assertSame("message", obj1, obj2);
                junit.framework.Assert.assertSame(obj1, obj2);
                junit.framework.Assert.assertSame("message", obj1, obj2);
              }
            }\
            """)
        .doTest();
  }
}
