/*
    * SPDX-FileCopyrightText: Copyright (c) 2011-2026 Yegor Bugayenko
    * SPDX-License-Identifier: MIT
    */
   package com.qulice.checkstyle;
   
   import com.google.common.base.Joiner;
   import com.qulice.spi.Environment;
   import com.qulice.spi.Violation;
  import java.io.File;
  import java.io.IOException;
  import java.util.Collection;
  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.Assertions;
  import org.junit.jupiter.api.Assumptions;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test case for general {@link CheckstyleValidator} behavior that
   * is not tied to a single check: method references, record/default
   * methods, lambda and generics at end of line, chained lambdas
   * passed as arguments, literal comparisons, and the imports-only
   * regression guard. Per-check coverage lives in the dedicated
   * {@code *CheckTest.java} and {@code Checkstyle*Test.java} files
   * in this package.
   * @since 0.3
   */
  final class CheckstyleValidatorTest {
  
      @Test
      void acceptsInstanceMethodReferences() throws Exception {
          Assertions.assertDoesNotThrow(
              () -> this.runValidation("InstanceMethodRef.java", true)
          );
      }
  
      @Test
      void acceptsIdAsMethodName() throws Exception {
          Assertions.assertDoesNotThrow(
              () -> this.runValidation("IdMethodName.java", true)
          );
      }
  
      @Test
      void acceptsDefaultMethodsWithFinalModifiers() throws Exception {
          Assertions.assertDoesNotThrow(
              () -> this.runValidation("DefaultMethods.java", true)
          );
      }
  
      @Test
      void supportsRecordTypes() throws Exception {
          Assertions.assertDoesNotThrow(
              () -> this.runValidation("ValidRecord.java", true)
          );
      }
  
      @Test
      void acceptsLambdaAndGenericsAtEndOfLine() throws Exception {
          Assertions.assertDoesNotThrow(
              () -> this.runValidation("ValidLambdaAndGenericsAtEndOfLine.java", true)
          );
      }
  
      @Test
      void acceptsChainedLambdaAsArgument() throws Exception {
          Assertions.assertDoesNotThrow(
              () -> this.runValidation("ValidLambdaIndentation.java", true)
          );
      }
  
      @Test
      void allowsStringLiteralsOnBothSideInComparisons() throws Exception {
          Assertions.assertDoesNotThrow(
              () -> this.runValidation("ValidLiteralComparisonCheck.java", true)
          );
      }
  
      @Test
      void failsClearlyWhenCacheParentIsNotWritable() throws Exception {
          final Environment.Mock mock = new Environment.Mock();
          final File parent = new File(mock.tempdir(), "checkstyle");
          Assumptions.assumeTrue(
              parent.mkdirs() || parent.isDirectory(),
              "Parent directory must exist for the regression scenario"
          );
          try {
              Assumptions.assumeTrue(
                  parent.setReadOnly(),
                  "Filesystem does not support marking a directory read-only"
              );
              Assumptions.assumeFalse(
                  parent.canWrite(),
                  "Skipped: current user can write despite read-only attribute"
             );
             final Environment env = mock.withFile(
                 "src/main/java/foo/Foo.java",
                 "package foo; class Foo {}"
             );
             MatcherAssert.assertThat(
                 "Validation must fail fast with a clear writability error",
                 Assertions.assertThrows(
                     IllegalStateException.class,
                     () -> new CheckstyleValidator(env).validate(env.files("Foo.java"))
                 ).getMessage(),
                 Matchers.allOf(
                     Matchers.containsString("write"),
                     Matchers.containsString(parent.getAbsolutePath())
                 )
             );
         } finally {
             parent.setWritable(true, false);
         }
     }
 
     @Test
     void doesNotThrowExceptionIfImportsOnly() throws Exception {
         final Environment.Mock mock = new Environment.Mock();
         final String crlf = String.valueOf('\r').concat(String.valueOf('\n'));
         final String name = "Foo.java";
         final Environment env = mock.withParam(
             "license",
             String.format(
                 "file:%s",
                 new License().savePackageInfo(
                     new File(mock.basedir(), "src/main/java/foo")
                 ).withLines("License-1.", "", "License-2.")
                     .withEol(String.valueOf('\n'))
                     .file()
             )
         ).withFile(
             String.format("src/main/java/foo/%s", name),
             Joiner.on(crlf).join(
                 "package com.google;",
                 crlf,
                 "import java.util.*;"
             )
         );
         MatcherAssert.assertThat(
             "Validation error should exist",
             new CheckstyleValidator(env).validate(env.files(name)),
             Matchers.not(Matchers.<Violation>empty())
         );
     }
 
     private Collection<Violation> runValidation(final String file,
         final boolean passes) throws IOException {
         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()
         );
         final Collection<Violation> results =
             new CheckstyleValidator(env).validate(env.files(file));
         MatcherAssert.assertThat(
             "validation result should match expected state",
             results.isEmpty(),
             Matchers.is(passes)
         );
         return results;
     }
 }