/*
 * Copyright 2023 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.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
public final class LockOnNonEnclosingClassLiteralTest {

  private final CompilationTestHelper compilationHelper =
      CompilationTestHelper.newInstance(LockOnNonEnclosingClassLiteral.class, getClass());

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

public class LockOnNonEnclosingClassLiteralPositiveCases {

  static {
    // BUG: Diagnostic contains: Lock on the class other than the enclosing class of the code block
    // can unintentionally prevent the locked class being used properly.
    synchronized (String.class) {
    }
  }

  private void methodContainsSynchronizedBlock() {
    // BUG: Diagnostic contains: Lock on the class other than the enclosing class of the code block
    // can unintentionally prevent the locked class being used properly.
    synchronized (String.class) {
    }
  }

  class SubClass {

    public void methodContainsSynchronizedBlock() {
      // BUG: Diagnostic contains: Lock on the class other than the enclosing class of the code
      // block can unintentionally prevent the locked class being used properly.
      synchronized (LockOnNonEnclosingClassLiteralPositiveCases.class) {
      }
    }
  }
}\
""")
        .doTest();
  }

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

            public class LockOnNonEnclosingClassLiteralNegativeCases {

              static {
                synchronized (LockOnNonEnclosingClassLiteralNegativeCases.class) {
                }
              }

              private void methodContainsSynchronizedBlock() {
                synchronized (LockOnNonEnclosingClassLiteralNegativeCases.class) {
                }
                synchronized (this) {
                }
              }

              class SubClass {

                public void methodContainsSynchronizedBlock() {
                  synchronized (SubClass.class) {
                  }
                }
              }
            }\
            """)
        .doTest();
  }
}
