/*
 * Copyright 2013 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.suppress;

import static com.google.errorprone.BugPattern.SeverityLevel.ERROR;
import static com.google.errorprone.FileObjects.forResources;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;

import com.google.common.collect.ImmutableList;
import com.google.errorprone.BugPattern;
import com.google.errorprone.DiagnosticTestHelper;
import com.google.errorprone.ErrorProneTestCompiler;
import com.google.errorprone.VisitorState;
import com.google.errorprone.bugpatterns.BugChecker;
import com.google.errorprone.bugpatterns.BugChecker.ReturnTreeMatcher;
import com.google.errorprone.matchers.Description;
import com.google.errorprone.scanner.ScannerSupplier;
import com.sun.source.tree.ReturnTree;
import com.sun.tools.javac.main.Main.Result;
import javax.tools.JavaFileObject;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Test for unsuppressible checks.
 *
 * @author eaftan@google.com (Eddie Aftandilan)
 */
@RunWith(JUnit4.class)
public class UnsuppressibleTest {

  @BugPattern(
      name = "MyChecker",
      summary = "Test checker that is unsuppressible",
      explanation = "Test checker that that is unsuppressible",
      suppressionAnnotations = {},
      severity = ERROR)
  public static class MyChecker extends BugChecker implements ReturnTreeMatcher {
    @Override
    public Description matchReturn(ReturnTree tree, VisitorState state) {
      return describeMatch(tree);
    }
  }

  private ErrorProneTestCompiler compiler;
  private DiagnosticTestHelper diagnosticHelper;

  @Before
  public void setUp() {
    diagnosticHelper = new DiagnosticTestHelper();
    compiler =
        new ErrorProneTestCompiler.Builder()
            .listenToDiagnostics(diagnosticHelper.collector)
            .report(ScannerSupplier.fromBugCheckerClasses(MyChecker.class))
            .build();
  }

  @Test
  public void testPositiveCase() {
    ImmutableList<JavaFileObject> sources =
        forResources(getClass(), "UnsuppressiblePositiveCases.java");
    assertThat(compiler.compile(sources), is(Result.ERROR));
    assertThat(diagnosticHelper.getDiagnostics().toString(), containsString("[MyChecker]"));
  }
}
