/*
 * Copyright 2017 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.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 ComplexBooleanConstantTest}.
 *
 * @author Sumit Bhagwani (bhagwani@google.com)
 */
@RunWith(JUnit4.class)
public class ComplexBooleanConstantTest {
  private final BugCheckerRefactoringTestHelper refactoringHelper =
      BugCheckerRefactoringTestHelper.newInstance(ComplexBooleanConstant.class, getClass());

  @Test
  public void refactorTest() {
    refactoringHelper
        .addInputLines(
            "in/Foo.java",
            """
            class Foo {
              int CONSTANT1 = 1;
              int CONSTANT2 = 1;

              int barNoOp() {
                return 1 - 1;
              }

              boolean barNoOpWithConstants() {
                return CONSTANT1 == CONSTANT2;
              }

              boolean barEquals() {
                return 1 == 1;
              }

              boolean barNotEquals() {
                return 1 != 1;
              }

              boolean f(boolean x) {
                boolean r;
                r = x || !false;
                r = x || !true;
                r = x || true;
                r = x && !false;
                r = x && !true;
                r = x && false;
                return r;
              }
            }
            """)
        .addOutputLines(
            "out/Foo.java",
            """
            class Foo {
              int CONSTANT1 = 1;
              int CONSTANT2 = 1;

              int barNoOp() {
                return 1 - 1;
              }

              boolean barNoOpWithConstants() {
                return CONSTANT1 == CONSTANT2;
              }

              boolean barEquals() {
                return true;
              }

              boolean barNotEquals() {
                return false;
              }

              boolean f(boolean x) {
                boolean r;
                r = true;
                r = x || !true;
                r = true;
                r = x && !false;
                r = false;
                r = false;
                return r;
              }
            }
            """)
        .doTest(TestMode.TEXT_MATCH);
  }

  @Test
  public void negative() {
    CompilationTestHelper.newInstance(ComplexBooleanConstant.class, getClass())
        .addSourceLines(
            "A.java",
            """
            package a;

            class A {
              static final int A = 1;
              static final int B = 2;
              static final boolean C = A > B;
              static final boolean D = A + B > 0;
              static final boolean E = (A + B) > 0;
            }
            """)
        .doTest();
  }
}
