/** Test the addWord method */
  @Test
  public void addWord() {

    assertEquals("Asserting hellow is not in empty dict", false, emptyDict.isWord("hellow"));
    assertEquals("Asserting hellow is not in small dict", false, smallDict.isWord("hellow"));
    assertEquals("Asserting hellow is not in large dict", false, largeDict.isWord("hellow"));

    emptyDict.addWord("hellow");
    smallDict.addWord("hellow");
    largeDict.addWord("hellow");

    assertEquals("Asserting hellow is in empty dict", true, emptyDict.isWord("hellow"));
    assertEquals("Asserting hellow is in small dict", true, smallDict.isWord("hellow"));
    assertEquals("Asserting hellow is in large dict", true, largeDict.isWord("hellow"));

    assertEquals("Asserting xyzabc is not in empty dict", false, emptyDict.isWord("xyzabc"));
    assertEquals("Asserting xyzabc is not in small dict", false, smallDict.isWord("xyzabc"));
    assertEquals("Asserting xyzabc is in large dict", false, largeDict.isWord("xyzabc"));

    emptyDict.addWord("XYZAbC");
    smallDict.addWord("XYZAbC");
    largeDict.addWord("XYZAbC");

    assertEquals("Asserting xyzabc is in empty dict", true, emptyDict.isWord("xyzabc"));
    assertEquals("Asserting xyzabc is in small dict", true, smallDict.isWord("xyzabc"));
    assertEquals("Asserting xyzabc is large dict", true, largeDict.isWord("xyzabc"));

    assertEquals("Testing isWord on empty: empty string", false, emptyDict.isWord(""));
    assertEquals("Testing isWord on small: empty string", false, smallDict.isWord(""));
    assertEquals("Testing isWord on large: empty string", false, largeDict.isWord(""));

    assertEquals("Testing isWord on small: no", false, smallDict.isWord("no"));
    assertEquals("Testing isWord on large: no", true, largeDict.isWord("no"));

    assertEquals("Testing isWord on small: subsequent", true, smallDict.isWord("subsequent"));
    assertEquals("Testing isWord on large: subsequent", true, largeDict.isWord("subsequent"));
  }
  /** Test the isWord method */
  @Test
  public void testIsWord() {
    assertEquals("Testing isWord on empty: Hello", false, emptyDict.isWord("Hello"));
    assertEquals("Testing isWord on small: Hello", true, smallDict.isWord("Hello"));
    assertEquals("Testing isWord on large: Hello", true, largeDict.isWord("Hello"));

    assertEquals("Testing isWord on small: hello", true, smallDict.isWord("hello"));
    assertEquals("Testing isWord on large: hello", true, largeDict.isWord("hello"));

    assertEquals("Testing isWord on small: hellow", false, smallDict.isWord("hellow"));
    assertEquals("Testing isWord on large: hellow", false, largeDict.isWord("hellow"));

    assertEquals("Testing isWord on empty: empty string", false, emptyDict.isWord(""));
    assertEquals("Testing isWord on small: empty string", false, smallDict.isWord(""));
    assertEquals("Testing isWord on large: empty string", false, largeDict.isWord(""));

    assertEquals("Testing isWord on small: no", false, smallDict.isWord("no"));
    assertEquals("Testing isWord on large: no", true, largeDict.isWord("no"));

    assertEquals("Testing isWord on small: subsequent", true, smallDict.isWord("subsequent"));
    assertEquals("Testing isWord on large: subsequent", true, largeDict.isWord("subsequent"));
  }