/*
    * SPDX-FileCopyrightText: Copyright (c) 2011-2026 Yegor Bugayenko
    * SPDX-License-Identifier: MIT
    */
   package com.qulice.checkstyle;
   
   import com.qulice.spi.Environment;
   import java.io.File;
   import org.cactoos.io.ResourceOf;
  import org.cactoos.text.FormattedText;
  import org.cactoos.text.IoCheckedText;
  import org.cactoos.text.TextOf;
  import org.hamcrest.MatcherAssert;
  import org.hamcrest.Matchers;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test case for {@link CheckstyleValidator}'s handling of the
   * {@code SingleSpaceSeparatorCheck}.
   *
   * @since 0.24.2
   */
  final class CheckstyleSingleSpaceSeparatorTest {
  
      @Test
      void rejectsDoubleWhitespaceInFieldDeclaration() throws Exception {
          final String file = "DoubleWhitespaceFieldDecl.java";
          final Environment.Mock mock = new Environment.Mock();
          final Environment env = mock.withParam(
              "license",
              String.format(
                  "file:%s",
                  new License().savePackageInfo(
                      new File(mock.basedir(), "src/main/java/foo")
                  ).withLines("Hello.")
                      .withEol(String.valueOf('\n')).file()
              )
          ).withFile(
              String.format("src/main/java/foo/%s", file),
              new IoCheckedText(
                  new TextOf(
                      new ResourceOf(
                          new FormattedText("com/qulice/checkstyle/%s", file)
                      )
                  )
              ).asString()
          );
          MatcherAssert.assertThat(
              "double whitespace in a field declaration must be reported",
              new CheckstyleValidator(env).validate(env.files(file)),
              Matchers.hasItem(
                  new ViolationMatcher(
                      "Use a single space to separate non-whitespace characters.",
                      file, "18", "SingleSpaceSeparatorCheck"
                  )
              )
          );
      }
  }