/*
 * 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.bugpatterns.inject;

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

/**
 * @author sgoldfeder@google.com (Steven Goldfeder)
 */
@RunWith(JUnit4.class)
public class InvalidTargetingOnScopingAnnotationTest {

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

  @Test
  public void positiveCase() {
    compilationHelper
        .addSourceLines(
            "InvalidTargetingOnScopingAnnotationPositiveCases.java",
            """
            package com.google.errorprone.bugpatterns.inject.testdata;

            import static java.lang.annotation.ElementType.CONSTRUCTOR;
            import static java.lang.annotation.ElementType.METHOD;
            import static java.lang.annotation.ElementType.PARAMETER;
            import static java.lang.annotation.ElementType.TYPE;
            import static java.lang.annotation.RetentionPolicy.RUNTIME;

            import com.google.inject.ScopeAnnotation;
            import java.lang.annotation.ElementType;
            import java.lang.annotation.Retention;
            import java.lang.annotation.Target;
            import javax.inject.Scope;

            /**
             * @author sgoldfeder@google.com(Steven Goldfeder)
             */
            public class InvalidTargetingOnScopingAnnotationPositiveCases {

              /** Scoping excludes METHOD */
              // BUG: Diagnostic contains: @Target({TYPE, METHOD})
              @Target(TYPE)
              @Scope
              @Retention(RUNTIME)
              public @interface TestAnnotation1 {}

              /** Scoping excludes TYPE */
              // BUG: Diagnostic contains: @Target({TYPE, METHOD})
              @Target(METHOD)
              @Scope
              @Retention(RUNTIME)
              public @interface TestAnnotation2 {}

              /** Scoping excludes both, but has other elements to preserve */
              // BUG: Diagnostic contains: @Target({TYPE, METHOD, PARAMETER})
              @Target(PARAMETER)
              @Scope
              @Retention(RUNTIME)
              public @interface TestAnnotation4 {}

              /** Scoping includes one of the required ones. */
              // BUG: Diagnostic contains: @Target({TYPE, METHOD, PARAMETER, CONSTRUCTOR})
              @Target({PARAMETER, METHOD, CONSTRUCTOR})
              @Scope
              @Retention(RUNTIME)
              public @interface TestAnnotation5 {}

              /** Same as above, but with a different physical manifestation */
              // BUG: Diagnostic contains: @Target({TYPE, METHOD, PARAMETER, CONSTRUCTOR})
              @Target(value = {ElementType.PARAMETER, METHOD, CONSTRUCTOR})
              @Scope
              @Retention(RUNTIME)
              public @interface TestAnnotation6 {}

              /** Target annotation is empty, nonsensical since it can't be applied to anything */
              // BUG: Diagnostic contains: @Target({TYPE, METHOD})
              @Target({})
              @ScopeAnnotation
              @Retention(RUNTIME)
              public @interface TestAnnotation7 {}
            }\
            """)
        .doTest();
  }

  @Test
  public void negativeCase() {
    compilationHelper
        .addSourceLines(
            "InvalidTargetingOnScopingAnnotationNegativeCases.java",
"""
package com.google.errorprone.bugpatterns.inject.testdata;

import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import javax.inject.Scope;

/**
 * @author sgoldfeder@google.com(Steven Goldfeder)
 */
public class InvalidTargetingOnScopingAnnotationNegativeCases {

  /** A scoping annotation with no specified target. */
  @Scope
  @Retention(RUNTIME)
  public @interface TestAnnotation1 {}

  /** A scoping annotation that contains more than the required */
  @Target({TYPE, METHOD, PARAMETER})
  @Scope
  @Retention(RUNTIME)
  public @interface TestAnnotation2 {}

  /** A scoping annotation with legal targeting. */
  @Target({TYPE, METHOD})
  @Scope
  @Retention(RUNTIME)
  public @interface TestAnnotation3 {}

  /**
   * A non-scoping annotation with targeting that would be illegal if it were a scoping annotation.
   */
  @Target(PARAMETER)
  @Retention(RUNTIME)
  public @interface TestAnnotation4 {}
}\
""")
        .doTest();
  }
}
