/*
 * Copyright 2021 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;

/** {@link MissingBraces}Test */
@RunWith(JUnit4.class)
public class MissingBracesTest {
  @Test
  public void positive() {
    BugCheckerRefactoringTestHelper.newInstance(MissingBraces.class, getClass())
        .addInputLines(
            "Test.java",
            """
            import java.util.List;

            class Test {
              void f(boolean x, List<Integer> is) {
                if (x) throw new AssertionError();
                else x = !x;
                while (x) g();
                do g();
                while (x);
                for (; x; ) g();
                for (int i : is) g();
              }

              void g() {}
            }
            """)
        .addOutputLines(
            "Test.java",
            """
            import java.util.List;

            class Test {
              void f(boolean x, List<Integer> is) {
                if (x) {
                  throw new AssertionError();
                } else {
                  x = !x;
                }
                while (x) {
                  g();
                }
                do {
                  g();
                } while (x);
                for (; x; ) {
                  g();
                }
                for (int i : is) {
                  g();
                }
              }

              void g() {}
            }
            """)
        .doTest();
  }

  @Test
  public void negative() {
    CompilationTestHelper.newInstance(MissingBraces.class, getClass())
        .addSourceLines(
            "Test.java",
            """
            class Test {
              void f(boolean x) {
                if (x) {
                  g();
                } else {
                  g();
                }
                while (x) {
                  g();
                }
                do {
                  g();
                } while (x);
                for (; ; ) {
                  g();
                }
              }

              void g() {}
            }
            """)
        .doTest();
  }

  @Test
  public void suggestedFixForNestedProblemsWithOverlappingBracePostfixInsertions() {
    BugCheckerRefactoringTestHelper.newInstance(MissingBraces.class, getClass())
        .addInputLines(
            "Test.java",
            """
            import java.util.List;

            class Test {
              private String findNotNull(List<String> items) {
                for (String item : items) if (item != null) return item;
                return null;
              }
            }
            """)
        .addOutputLines(
            "Test.java",
            """
            import java.util.List;

            class Test {
              private String findNotNull(List<String> items) {
                for (String item : items) {
                  if (item != null) {
                    return item;
                  }
                }
                return null;
              }
            }
            """)
        .doTest();
  }
}
