/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.maven.plugins.jar;
  
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.util.Locale;
  import java.util.Optional;
  
  import org.apache.maven.toolchain.Toolchain;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Assumptions;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  class ToolchainsJdkVersionTest {
  
      @Mock
      private Toolchain toolchain;
  
      private final ToolchainsJdkSpecification toolchainsJdkSpecification = new ToolchainsJdkSpecification();
  
      @Test
      void shouldReturnCorrectSpec() {
  
          Path javacPath = getJavacPath();
          Assumptions.assumeTrue(Files.isExecutable(javacPath));
  
          when(toolchain.findTool("javac")).thenReturn(javacPath.toString());
  
          Optional<String> jdkVersion = toolchainsJdkSpecification.getJDKSpecification(toolchain);
          Assertions.assertTrue(jdkVersion.isPresent());
          Assertions.assertEquals(System.getProperty("java.specification.version"), jdkVersion.get());
      }
  
      @Test
      void shouldReturnEmptySpec() {
  
          when(toolchain.findTool("javac")).thenReturn(null);
  
          Optional<String> jdkVersion = toolchainsJdkSpecification.getJDKSpecification(toolchain);
          Assertions.assertFalse(jdkVersion.isPresent());
      }
  
      private String getJavaCName() {
          if (System.getProperty("os.name", "").toLowerCase(Locale.ROOT).startsWith("win")) {
              return "javac.exe";
          } else {
              return "javac";
          }
      }
  
      private Path getJavacPath() {
          String javaCName = getJavaCName();
  
          String javaHome = System.getProperty("java.home");
  
          Path javacPath = Paths.get(javaHome, "bin", javaCName);
          if (Files.isExecutable(javacPath)) {
              return javacPath;
          }
  
          // try with jre
          return Paths.get(javaHome, "../bin", javaCName);
      }
  }