CommonStringUtilTest.java

package com.wemblog.foundation.utility;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.util.ArrayList;
import java.util.List;

import org.junit.Test;


public class CommonStringUtilTest {

  @Test
  public void testIsEmpty() {
    assertTrue(CommonStringUtil.isEmpty(""));
    assertFalse(CommonStringUtil.isEmpty(" "));
    assertFalse(CommonStringUtil.isEmpty("test"));
    assertFalse(CommonStringUtil.isEmpty("   test   "));
    assertTrue(CommonStringUtil.isEmpty(null));
  }

  @Test
  public void testIsEmptyWithTrim() {
    assertTrue(CommonStringUtil.isEmpty("", false));
    assertTrue(CommonStringUtil.isEmpty(" ", true));
    assertFalse(CommonStringUtil.isEmpty(" ", false));
    assertFalse(CommonStringUtil.isEmpty("test", true));
    assertFalse(CommonStringUtil.isEmpty("   test   ", true));
    assertTrue(CommonStringUtil.isEmpty(null, true));
    assertTrue(CommonStringUtil.isEmpty(null, false));
  }

  @Test
  public void testConvertArrayToString() {
    String[] test = { "test1", "test2" };
    assertEquals(CommonStringUtil.convertArrayToString(new String[1]), "");
    assertEquals(CommonStringUtil.convertArrayToString(null), "");
    assertEquals(CommonStringUtil.convertArrayToString(test), "test1,test2");
    test[1] = "test3 test4";
    assertEquals(CommonStringUtil.convertArrayToString(test), "test1,test3 test4");
    ArrayList<String> test1 = new ArrayList<String>();
    test1.add("test1    test2");
    test1.add("test3");
    assertEquals(CommonStringUtil.convertArrayToString(test1.toArray(new String[test1.size()])),
        "test1    test2,test3");
  }

  @Test
  public void testConvertArrayListToString() {
    List<String> test = new ArrayList<String>();
    assertEquals(CommonStringUtil.convertArrayListToString(null), "");
    assertEquals(CommonStringUtil.convertArrayListToString(test), "");
    test.add("test1");
    test.add("test2");
    assertEquals(CommonStringUtil.convertArrayListToString(test), "test1,test2");
    test.add("test3 test4");
    assertEquals(CommonStringUtil.convertArrayListToString(test), "test1,test2,test3 test4");
  }

}