/*
 * 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.javadoc;

import com.google.errorprone.BugCheckerRefactoringTestHelper;
import com.google.errorprone.BugCheckerRefactoringTestHelper.TestMode;
import com.google.errorprone.CompilationTestHelper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Unit tests for {@link MissingSummary} bug pattern. */
@RunWith(JUnit4.class)
public final class MissingSummaryTest {

  private final BugCheckerRefactoringTestHelper refactoring =
      BugCheckerRefactoringTestHelper.newInstance(MissingSummary.class, getClass());

  private final CompilationTestHelper helper =
      CompilationTestHelper.newInstance(MissingSummary.class, getClass());

  @Test
  public void replaceReturn() {
    refactoring
        .addInputLines(
            "Test.java",
            """
            interface Test {
              /**
               * @param n foo
               * @return n
               */
              int test(int n);
            }
            """)
        .addOutputLines(
            "Test.java",
            """
            interface Test {
              /**
               * Returns n.
               *
               * @param n foo
               */
              int test(int n);
            }
            """)
        .doTest(TestMode.TEXT_MATCH);
  }

  @Test
  public void replaceSee() {
    refactoring
        .addInputLines(
            "Test.java",
            """
            interface Test {
              /**
               * @param n foo
               * @see List other impl
               */
              void test(int n);
              /**
               * @param n foo
               * @see List
               */
              void test2(int n);
            }
            """)
        .addOutputLines(
            "Test.java",
            """
            interface Test {
              /**
               * See {@link List other impl}.
               *
               * @param n foo
               */
              void test(int n);
              /**
               * See {@link List}.
               *
               * @param n foo
               */
              void test2(int n);
            }
            """)
        .doTest(TestMode.TEXT_MATCH);
  }

  @Test
  public void publicCase() {
    helper
        .addSourceLines(
            "Test.java",
            """
            // BUG: Diagnostic contains: @see
            /** @see another thing */
            public interface Test {
              // BUG: Diagnostic contains: @return
              /** @return foo */
              int test();
            }
            """)
        .doTest();
  }

  @Test
  public void privateCase() {
    helper
        .addSourceLines(
            "Test.java",
            """
            class Test {
              /** @throws IllegalStateException */
              private void test() {}
            }
            """)
        .doTest();
  }

  @Test
  public void effectivelyPrivateCase() {
    helper
        .addSourceLines(
            "Test.java",
            """
            class Test {
              private class Inner {
                /** @throws IllegalStateException */
                public void test() {}
              }
            }
            """)
        .doTest();
  }

  @Test
  public void negative() {
    helper
        .addSourceLines(
            "Test.java",
            """
            interface Test {
              /**
               * Summary line!
               *
               * @return n
               */
              int test();
            }
            """)
        .doTest();
  }

  @Test
  public void negativeAnnotations() {
    helper
        .addSourceLines(
            "Test.java",
            """
            class Test {
              /** @param o thing to compare */
              @Override public boolean equals(Object o) { return true; }
              /** @deprecated use something else */
              @Deprecated public void frobnicate() {}
            }
            """)
        .doTest();
  }

  @Test
  public void negativeConstructor() {
    helper
        .addSourceLines(
            "Test.java",
            """
            class Test {
              /** @param o thing to compare */
              public Test(Object o) {}
            }
            """)
        .doTest();
  }

  @Test
  public void negativePrivate() {
    helper
        .addSourceLines(
            "Test.java",
            """
            class Test {
              /** @param o thing to compare */
              private Test(Object o) {}
            }
            """)
        .doTest();
  }

  @Test
  public void negativeOverride() {
    helper
        .addSourceLines(
            "Test.java",
            """
            class Test implements java.util.function.Predicate<Object> {
              /** @param o thing to compare */
              public boolean test(Object o) { return false; }
            }
            """)
        .doTest();
  }

  @Test
  public void seeWithHtmlLink() {
    helper
        .addSourceLines(
            "Test.java",
            """
            // BUG: Diagnostic contains:
            /** @see <a href="foo">bar</a> */
            public interface Test {}
            """)
        .doTest();
  }

  @Test
  public void emptyReturn() {
    helper
        .addSourceLines(
            "Test.java",
            """
            interface Test {
              // BUG: Diagnostic contains:
              /** @return */
              int test(int n);
            }
            """)
        .doTest();
  }

  @Test
  public void emptyComment() {
    helper
        .addSourceLines(
            "Test.java",
            """
            package test;
            /** */
            // BUG: Diagnostic contains: summary line is required
            public class Test {
            }
            """)
        .doTest();
  }
}
