code: /**
   * This file is part of Eclipse Steady.
   *
   * 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.
   *
   * SPDX-License-Identifier: Apache-2.0
   * SPDX-FileCopyrightText: Copyright (c) 2018-2020 SAP SE or an SAP affiliate company and Eclipse Steady contributors
   */
  package org.eclipse.steady.python.pip;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.junit.Test;
  
  public class PyWrapperTest {
  
    @Test
    public void testPythonVersion() {
      final List<String> list = new ArrayList<String>();
      list.add("python");
      list.add("--version");
  
      try {
        // Perform call
        final ProcessBuilder pb = new ProcessBuilder(list);
  
        // Start and wait
        final Process process = pb.start();
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        String line;
        System.out.print("Output of [python --version]:");
        while ((line = reader.readLine()) != null) {
          System.out.println(line);
        }
      } catch (IOException ioe) {
        ioe.printStackTrace();
      }
    }
  
    @Test
    public void testPipVersion() {
      final List<String> list = new ArrayList<String>();
      list.add("python");
      list.add("-m");
      list.add("pip");
      list.add("--version");
  
      try {
        // Perform call
        final ProcessBuilder pb = new ProcessBuilder(list);
  
        // Start and wait
        final Process process = pb.start();
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        String line;
        System.out.print("Output of [python -m pip --version]:");
        while ((line = reader.readLine()) != null) {
          System.out.println(line);
        }
      } catch (IOException ioe) {
        ioe.printStackTrace();
      }
    }
  }
  