/*
 * 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 org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** {@link TryWithResourcesVariable}Test */
@RunWith(JUnit4.class)
public class TryWithResourcesVariableTest {
  private final BugCheckerRefactoringTestHelper testHelper =
      BugCheckerRefactoringTestHelper.newInstance(TryWithResourcesVariable.class, getClass());

  @Test
  public void refactoring() {
    testHelper
        .addInputLines(
            "Test.java",
            """
            class Test {
              void f(AutoCloseable r1) {
                try (AutoCloseable r2 = r1) {
                  System.err.println(r2);
                } catch (Exception e) {
                }
              }
            }
            """)
        .addOutputLines(
            "Test.java",
            """
            class Test {
              void f(AutoCloseable r1) {
                try (r1) {
                  System.err.println(r1);
                } catch (Exception e) {
                }
              }
            }
            """)
        .doTest();
  }

  @Test
  public void refactoringTwoVariables() {
    testHelper
        .addInputLines(
            "Test.java",
            """
            class Test {
              void f(AutoCloseable a1, AutoCloseable a2) {
                try (AutoCloseable b1 = a1;
                    AutoCloseable b2 = a2) {
                  System.err.println(b1);
                  System.err.println(b2);
                } catch (Exception e) {
                }
              }
            }
            """)
        .addOutputLines(
            "Test.java",
            """
            class Test {
              void f(AutoCloseable a1, AutoCloseable a2) {
                try (a1;
                    a2) {
                  System.err.println(a1);
                  System.err.println(a2);
                } catch (Exception e) {
                }
              }
            }
            """)
        .doTest();
  }

  @Test
  public void negativeNonFinal() {
    testHelper
        .addInputLines(
            "Test.java",
            """
            abstract class Test {
              abstract AutoCloseable reassign(AutoCloseable r);

              void f(AutoCloseable r1) {
                r1 = reassign(r1);
                try (AutoCloseable r2 = r1) {
                  System.err.println(r2);
                } catch (Exception e) {
                }
              }
            }
            """)
        .expectUnchanged()
        .doTest();
  }
}
