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.shared.util;
  
  import static org.junit.Assert.assertEquals;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.junit.Test;
  
  public class StringUtilTest {
  
    @Test
    public void testJoin() {
      final String[] a = new String[] {"a", "b"};
      final String j1 = StringUtil.join(a, ", ");
      assertEquals("a, b", j1);
  
      final List<String> s = new ArrayList<String>();
      s.add("1");
      s.add("2");
      final String j2 = StringUtil.join(s, ", ");
      assertEquals("1, 2", j2);
    }
  
    @Test
    public void testIsEmptyOrContainsEmptyString() {
      assertEquals(true, StringUtil.isEmptyOrContainsEmptyString(null));
      assertEquals(true, StringUtil.isEmptyOrContainsEmptyString(new String[] {}));
      assertEquals(true, StringUtil.isEmptyOrContainsEmptyString(new String[] {""}));
      assertEquals(false, StringUtil.isEmptyOrContainsEmptyString(new String[] {"foo"}));
      assertEquals(false, StringUtil.isEmptyOrContainsEmptyString(new String[] {"foo", "bar"}));
    }
  
    @Test
    public void testPadLeft() {
      assertEquals("  1", StringUtil.padLeft(1, 3)); // Padding of a shorter string representation
      assertEquals(
          "11111",
          StringUtil.padLeft(11111, 3)); // Padding of a longer string representation must not cut
    }
  }
  