/*
 * Copyright 2015 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.common.collect.ImmutableList;
import com.google.errorprone.CompilationTestHelper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** {@link MissingOverride}Test */
@RunWith(JUnit4.class)
public class MissingOverrideTest {

  private final CompilationTestHelper compilationHelper =
      CompilationTestHelper.newInstance(MissingOverride.class, getClass());

  @Test
  public void simple() {
    compilationHelper
        .addSourceLines(
            "Super.java",
            """
            public class Super {
              void f() {}
            }
            """)
        .addSourceLines(
            "Test.java",
            """
            public class Test extends Super {
              // BUG: Diagnostic contains: f overrides method in Super; expected @Override
              public void f() {}
            }
            """)
        .doTest();
  }

  @Test
  public void abstractMethod() {
    compilationHelper
        .addSourceLines(
            "Super.java",
            """
            public abstract class Super {
              abstract void f();
            }
            """)
        .addSourceLines(
            "Test.java",
            """
            public class Test extends Super {
              // BUG: Diagnostic contains: f implements method in Super; expected @Override
              public void f() {}
            }
            """)
        .doTest();
  }

  @Test
  public void generatedMethod() {
    compilationHelper
        .addSourceLines(
            "Test.java",
            """
            import javax.annotation.processing.Generated;

            @Generated("foo")
            public abstract class Test {
              public abstract int hashCode();
            }
            """)
        .doTest();
  }

  @Test
  public void interfaceMethod() {
    compilationHelper
        .addSourceLines(
            "Super.java",
            """
            interface Super {
              void f();
            }
            """)
        .addSourceLines(
            "Test.java",
            """
            public class Test implements Super {
              // BUG: Diagnostic contains: f implements method in Super; expected @Override
              public void f() {}
            }
            """)
        .doTest();
  }

  @Test
  public void bothStatic() {
    compilationHelper
        .addSourceLines(
            "Super.java",
            """
            public class Super {
              static void f() {}
            }
            """)
        .addSourceLines(
            "Test.java",
            """
            public class Test extends Super {
              public static void f() {}
            }
            """)
        .doTest();
  }

  @Test
  public void deprecatedMethod() {
    compilationHelper
        .addSourceLines(
            "Super.java",
            """
            public class Super {
              @Deprecated
              void f() {}
            }
            """)
        .addSourceLines(
            "Test.java",
            """
            public class Test extends Super {
              public void f() {}
            }
            """)
        .doTest();
  }

  @Test
  public void interfaceOverride() {
    compilationHelper
        .addSourceLines(
            "Super.java",
            """
            interface Super {
              void f();
            }
            """)
        .addSourceLines(
            "Test.java",
            """
            public interface Test extends Super {
              // BUG: Diagnostic contains: f implements method in Super; expected @Override
              void f();
            }
            """)
        .doTest();
  }

  @Test
  public void ignoreInterfaceOverride() {
    compilationHelper
        .setArgs(ImmutableList.of("-XepOpt:MissingOverride:IgnoreInterfaceOverrides=true"))
        .addSourceLines(
            "Super.java",
            """
            interface Super {
              void f();
            }
            """)
        .addSourceLines(
            "Test.java",
            """
            public interface Test extends Super {
              void f();
            }
            """)
        .doTest();
  }

  @Test
  public void explicitRecordAccessor() {
    compilationHelper
        .addSourceLines(
            "Baz.java",
            """
            public record Baz(int x) {
              // BUG: Diagnostic contains: x is an explicitly declared accessor method
              public int x() {
                return x;
              }
              public int x(int y) {
                return y;
              }
              public int y() {
                return x;
              }
            }
            """)
        .doTest();
  }

  @Test
  public void explicitRecordAccessor_doesNotFlagConstructors() {
    compilationHelper
        .addSourceLines(
            "Test.java",
            """
            public record Test(int x) {
              public Test() {
                this(1);
              }

              public Test {}
            }
            """)
        .doTest();
  }
}
