/*
    * SPDX-FileCopyrightText: Copyright (c) 2011-2026 Yegor Bugayenko
    * SPDX-License-Identifier: MIT
    */
   package com.qulice.pmd;
   
   import com.qulice.spi.Environment;
   import com.qulice.spi.Violation;
   import java.io.File;
  import java.util.Collections;
  import java.util.stream.Collectors;
  import org.cactoos.text.TextOf;
  import org.hamcrest.MatcherAssert;
  import org.hamcrest.Matchers;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test case for UnnecessaryLocalRule.
   * @since 0.24
   */
  final class UnnecessaryLocalRuleTest {
  
      @Test
      void detectsUnnecessaryLocalVariableOnReturn() throws Exception {
          final String file = "UnnecessaryLocal.java";
          final Environment.Mock mock = new Environment.Mock();
          final String name = String.format("src/main/java/foo/%s", file);
          final Environment env = mock.withFile(
              name,
              new TextOf(
                  this.getClass().getResourceAsStream(file)
              ).asString()
          );
          MatcherAssert.assertThat(
              "UnnecessaryLocalRule should fire on a local variable used only in return",
              new PmdValidator(env).validate(
                  Collections.singletonList(new File(env.basedir(), name))
              ).stream().map(Violation::name).collect(Collectors.toList()),
              Matchers.hasItem("UnnecessaryLocalRule")
          );
      }
  
      @Test
      void doesNotFireWhenVariableIsUsedInLoop() throws Exception {
          final String file = "UnnecessaryLocalInLoop.java";
          final Environment.Mock mock = new Environment.Mock();
          final String name = String.format("src/main/java/foo/%s", file);
          final Environment env = mock.withFile(
              name,
              new TextOf(
                  this.getClass().getResourceAsStream(file)
              ).asString()
          );
          MatcherAssert.assertThat(
              "UnnecessaryLocalRule should not fire when variable is used in a loop",
              new PmdValidator(env).validate(
                  Collections.singletonList(new File(env.basedir(), name))
              ).stream().map(Violation::name).collect(Collectors.toList()),
              Matchers.not(Matchers.hasItem("UnnecessaryLocalRule"))
          );
      }
  
      @Test
      void doesNotFireWhenVariableIsUsedMoreThanOnce() throws Exception {
          final String file = "UnnecessaryLocalUsedTwice.java";
          final Environment.Mock mock = new Environment.Mock();
          final String name = String.format("src/main/java/foo/%s", file);
          final Environment env = mock.withFile(
              name,
              new TextOf(
                  this.getClass().getResourceAsStream(file)
              ).asString()
          );
          MatcherAssert.assertThat(
              "UnnecessaryLocalRule should not fire when variable is used more than once",
              new PmdValidator(env).validate(
                  Collections.singletonList(new File(env.basedir(), name))
              ).stream().map(Violation::name).collect(Collectors.toList()),
              Matchers.not(Matchers.hasItem("UnnecessaryLocalRule"))
          );
      }
  }