/*
 * 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;

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 InterfaceWithOnlyStatics} bug pattern. */
@RunWith(JUnit4.class)
public class InterfaceWithOnlyStaticsTest {
  private final CompilationTestHelper testHelper =
      CompilationTestHelper.newInstance(InterfaceWithOnlyStatics.class, getClass());
  private final BugCheckerRefactoringTestHelper refactoringHelper =
      BugCheckerRefactoringTestHelper.newInstance(InterfaceWithOnlyStatics.class, getClass());

  @Test
  public void positive() {
    testHelper
        .addSourceLines(
            "Test.java",
            """
            // BUG: Diagnostic contains: InterfaceWithOnlyStatics
            interface Test {
              public static final int foo = 42;
            }
            """)
        .doTest();
  }

  @Test
  public void negative_hasNonStaticMethod() {
    testHelper
        .addSourceLines(
            "Test.java",
            """
            interface Test {
              public static final int foo = 42;

              int bar();
            }
            """)
        .doTest();
  }

  @Test
  public void negative_notInterface() {
    testHelper
        .addSourceLines(
            "Test.java",
            """
            class Test {
              public static final int foo = 42;
            }
            """)
        .doTest();
  }

  @Test
  public void negative_annotation() {
    testHelper
        .addSourceLines(
            "Test.java",
            """
            @interface Test {
              public static final int foo = 42;
            }
            """)
        .doTest();
  }

  @Test
  public void negative_extends() {
    testHelper
        .addSourceLines(
            "A.java", //
            "interface A {}")
        .addSourceLines(
            "Test.java",
            """
            interface Test extends A {
              int foo = 42;

              static int bar() {
                return 1;
              }
            }
            """)
        .doTest();
  }

  @Test
  public void negative_daggerModules() {
    testHelper
        .addSourceLines(
            "Module.java",
            """
            package dagger;

            public @interface Module {}
            """)
        .addSourceLines(
            "Test.java",
            """
            import dagger.Module;

            @Module
            interface Test {
              public static final int foo = 42;
            }
            """)
        .doTest();
  }

  @Test
  public void negative_daggerModules_producerModule() {
    testHelper
        .addSourceLines(
            "ProducerModule.java",
            """
            package dagger.producers;

            public @interface ProducerModule {}
            """)
        .addSourceLines(
            "Test.java",
            """
            import dagger.producers.ProducerModule;

            @ProducerModule
            interface Test {
              public static final int foo = 42;
            }
            """)
        .doTest();
  }

  @Test
  public void refactoring() {
    refactoringHelper
        .addInputLines(
            "Test.java",
            """
            interface Test {
              int foo = 42;

              static int bar() {
                return 1;
              }
            }
            """)
        .addOutputLines(
            "Test.java",
            """
            final class Test {
              public static final int foo = 42;

              public static int bar() {
                return 1;
              }

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

  @Test
  public void refactoring_innerClass() {
    refactoringHelper
        .addInputLines(
            "Foo.java",
            """
            class Foo {
              interface Test {
                int foo = 42;
              }
            }
            """)
        .addOutputLines(
            "Foo.java",
            """
            class Foo {
              static final class Test {
                public static final int foo = 42;

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

  @Test
  public void negativeSealed() {
    testHelper
        .addSourceLines(
            "Test.java",
            """
            sealed interface Test {
              record A() implements Test {}

              record B() implements Test {}
            }
            """)
        .doTest();
  }
}
