/*
 * Copyright 2018 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 PreconditionsCheckNotNullRepeated} check.
 *
 * @author bhagwani@google.com (Sumit Bhagwani)
 */
@RunWith(JUnit4.class)
public class PreconditionsCheckNotNullRepeatedTest {

  private final BugCheckerRefactoringTestHelper testHelper =
      BugCheckerRefactoringTestHelper.newInstance(
          PreconditionsCheckNotNullRepeated.class, getClass());
  private final CompilationTestHelper compilationHelper =
      CompilationTestHelper.newInstance(PreconditionsCheckNotNullRepeated.class, getClass());

  @Test
  public void positiveMatchesWithReplacement() {
    testHelper
        .addInputLines(
            "in/Test.java",
            """
            import static com.google.common.base.Preconditions.checkNotNull;
            import com.google.common.base.Preconditions;

            public class Test {
              public void error() {
                Object someObject = new Object();
                Preconditions.checkNotNull(someObject, someObject);
                checkNotNull(someObject, someObject);
              }
            }
            """)
        .addOutputLines(
            "out/Test.java",
            """
            import static com.google.common.base.Preconditions.checkNotNull;
            import com.google.common.base.Preconditions;

            public class Test {
              public void error() {
                Object someObject = new Object();
                Preconditions.checkNotNull(someObject, "someObject must not be null");
                checkNotNull(someObject, "someObject must not be null");
              }
            }
            """)
        .doTest();
  }

  @Test
  public void flagArgInVarargs() {
    compilationHelper
        .addSourceLines(
            "out/Test.java",
            """
            import static com.google.common.base.Preconditions.checkNotNull;
            import com.google.common.base.Preconditions;

            public class Test {
              public void notError() {
                Object obj = new Object();
                Preconditions.checkNotNull(
                    obj,
                    "%s must not be null",
                    // BUG: Diagnostic contains: Including `obj` in the failure message
                    obj);
                String s = "test string";
                // BUG: Diagnostic contains: PreconditionsCheckNotNullRepeated
                Preconditions.checkNotNull(s, s, s);
              }
            }
            """)
        .doTest();
  }

  @Test
  public void negativeCases() {
    compilationHelper
        .addSourceLines(
            "out/Test.java",
            """
            import static com.google.common.base.Preconditions.checkNotNull;
            import com.google.common.base.Preconditions;

            public class Test {
              public void notError() {
                Object obj = new Object();
                Preconditions.checkNotNull(obj);
                Preconditions.checkNotNull(obj, "obj");
                Preconditions.checkNotNull(obj, "check with message");
                Preconditions.checkNotNull(obj, "check with msg and an arg %s", new Object());
              }
            }
            """)
        .doTest();
  }
}
