/*
 * 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;

/** {@link DoNotClaimAnnotations}Test */
@RunWith(JUnit4.class)
public class DoNotClaimAnnotationsTest {

  private final BugCheckerRefactoringTestHelper testHelper =
      BugCheckerRefactoringTestHelper.newInstance(DoNotClaimAnnotations.class, getClass());

  @Test
  public void positive() {
    testHelper
        .addInputLines(
            "Test.java",
            """
import java.util.Set;
import javax.annotation.processing.Processor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.lang.model.element.TypeElement;

abstract class Test implements Processor {
  @Override
  public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    return true;
  }
}
""")
        .addOutputLines(
            "Test.java",
            """
import java.util.Set;
import javax.annotation.processing.Processor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.lang.model.element.TypeElement;

abstract class Test implements Processor {
  @Override
  public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    return false;
  }
}
""")
        .doTest();
  }

  @Test
  public void negative() {
    testHelper
        .addInputLines(
            "Test.java",
            """
import java.util.Set;
import javax.annotation.processing.Processor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.lang.model.element.TypeElement;

abstract class Test implements Processor {
  @Override
  public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    return false;
  }
}
""")
        .expectUnchanged()
        .doTest();
  }

  @Test
  public void negative_notAProcessor() {
    testHelper
        .addInputLines(
            "Test.java",
            """
import java.util.Set;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.lang.model.element.TypeElement;

abstract class Test {
  public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    return true;
  }
}
""")
        .expectUnchanged()
        .doTest();
  }

  @Test
  public void unfixable() {
    CompilationTestHelper.newInstance(DoNotClaimAnnotations.class, getClass())
        .addSourceLines(
            "Test.java",
            """
import java.util.Set;
import javax.annotation.processing.Processor;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.lang.model.element.TypeElement;

abstract class Test implements Processor {
  abstract boolean helper();

  @Override
  public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    try {
      // BUG: Diagnostic contains:
      return helper();
    } catch (Throwable t) {
    }
    return false;
  }
}
""")
        .doTest();
  }
}
