/*
 * Copyright 2020 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.BugCheckerRefactoringTestHelper;
import com.google.errorprone.CompilationTestHelper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Unit tests for {@link StaticMockMember} bug pattern.
 *
 * @author bhagwani@google.com (Sumit Bhagwani)
 */
@RunWith(JUnit4.class)
public class StaticMockMemberTest {
  private final BugCheckerRefactoringTestHelper testHelper =
      BugCheckerRefactoringTestHelper.newInstance(StaticMockMember.class, getClass());
  private final CompilationTestHelper compilationHelper =
      CompilationTestHelper.newInstance(StaticMockMember.class, getClass());

  @Test
  public void positiveCases() {
    testHelper
        .addInputLines(
            "in/Test.java",
            """
            import org.junit.runner.RunWith;
            import org.junit.runners.JUnit4;
            import org.mockito.Mock;

            @RunWith(JUnit4.class)
            public class Test {
              @Mock private static String mockedPrivateString;
              @Mock static String mockedString;
            }
            """)
        .addOutputLines(
            "out/Test.java",
            """
            import org.junit.runner.RunWith;
            import org.junit.runners.JUnit4;
            import org.mockito.Mock;

            @RunWith(JUnit4.class)
            public class Test {
              @Mock private String mockedPrivateString;
              @Mock String mockedString;
            }
            """)
        .doTest();
  }

  @Test
  public void negativeCases() {
    compilationHelper
        .addSourceLines(
            "in/Test.java",
            """
            import org.junit.runner.RunWith;
            import org.junit.runners.JUnit4;
            import org.mockito.Mock;

            @RunWith(JUnit4.class)
            public class Test {
              @Mock private String mockedPrivateString;
              @Mock String mockedString;
            }
            """)
        .doTest();
  }

  @Test
  public void memberSuppression() {
    compilationHelper
        .addSourceLines(
            "in/Test.java",
            """
            import org.junit.runner.RunWith;
            import org.junit.runners.JUnit4;
            import org.mockito.Mock;

            @RunWith(JUnit4.class)
            public class Test {
              @SuppressWarnings("StaticMockMember")
              @Mock
              private static String mockedPrivateString;
            }
            """)
        .doTest();
  }

  @Test
  public void flagIfRemovingStaticWontCompile() {
    compilationHelper
        .addSourceLines(
            "in/Test.java",
            """
            import org.junit.runner.RunWith;
            import org.junit.runners.JUnit4;
            import org.mockito.Mock;

            @RunWith(JUnit4.class)
            public class Test {
              // BUG: Diagnostic contains: StaticMockMember
              @Mock private static String mockedPrivateString;

              static String someStaticMethod() {
                return mockedPrivateString;
              }
            }
            """)
        .doTest();
  }
}
