/*
 * 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 TruthGetOrDefault} bug pattern.
 *
 * @author bhagwani@google.com (Sumit Bhagwani)
 */
@RunWith(JUnit4.class)
public class TruthGetOrDefaultTest {
  private final CompilationTestHelper compilationHelper =
      CompilationTestHelper.newInstance(TruthGetOrDefault.class, getClass());
  private final BugCheckerRefactoringTestHelper testHelper =
      BugCheckerRefactoringTestHelper.newInstance(TruthGetOrDefault.class, getClass());

  @Test
  public void positiveCases() {
    compilationHelper
        .addSourceLines(
            "Test.java",
            """
            import static com.google.common.truth.Truth.assertThat;
            import java.util.HashMap;
            import java.util.Map;

            class Test {
              void test() {
                Map<String, Integer> map = new HashMap<>();
                // BUG: Diagnostic contains: TruthGetOrDefault
                assertThat(map.getOrDefault("key", 0)).isEqualTo(0);
                Integer expectedVal = 0;
                // BUG: Diagnostic contains: TruthGetOrDefault
                assertThat(map.getOrDefault("key", expectedVal)).isEqualTo(expectedVal);
                Map<String, Long> longMap = new HashMap<>();
                // BUG: Diagnostic contains: TruthGetOrDefault
                assertThat(longMap.getOrDefault("key", 0L)).isEqualTo(5L);
              }
            }
            """)
        .doTest();
  }

  @Test
  public void negativeCases() {
    compilationHelper
        .addSourceLines(
            "Test.java",
"""
import static com.google.common.truth.Truth.assertThat;
import java.util.HashMap;
import java.util.Map;

class Test {
  void test() {
    Map<String, Integer> map = new HashMap<>();
    Integer expectedVal = 10;
    assertThat(map.getOrDefault("key", 0)).isEqualTo(expectedVal);
    assertThat(map.getOrDefault("key", Integer.valueOf(0))).isEqualTo(Integer.valueOf(1));
  }
}
""")
        .doTest();
  }

  @Test
  public void fixGeneration() {
    testHelper
        .addInputLines(
            "in/Test.java",
            """
            import static com.google.common.truth.Truth.assertThat;
            import java.util.HashMap;
            import java.util.Map;

            class Test {
              void test() {
                Map<String, Integer> map = new HashMap<>();
                assertThat(map.getOrDefault("key", 0)).isEqualTo(1);
                Map<String, Long> longMap = new HashMap<>();
                assertThat(longMap.getOrDefault("key", 0L)).isEqualTo(0L);
                assertThat(longMap.getOrDefault("key", 0L)).isEqualTo(0);
              }
            }
            """)
        .addOutputLines(
            "out/Test.java",
            """
            import static com.google.common.truth.Truth.assertThat;
            import java.util.HashMap;
            import java.util.Map;

            class Test {
              void test() {
                Map<String, Integer> map = new HashMap<>();
                assertThat(map).containsEntry("key", 1);
                Map<String, Long> longMap = new HashMap<>();
                assertThat(longMap).doesNotContainKey("key");
                assertThat(longMap.getOrDefault("key", 0L)).isEqualTo(0);
              }
            }
            """)
        .doTest();
  }
}
