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17 package org.apache.commons.configuration.tree;
18
19 import junit.framework.TestCase;
20
21 /***
22 * Test class for ViewNode.
23 *
24 * @version $Id: TestViewNode.java 439648 2006-09-02 20:42:10Z oheger $
25 */
26 public class TestViewNode extends TestCase
27 {
28 /*** Stores the view node to be tested. */
29 ViewNode viewNode;
30
31 /*** Stores a regular node. */
32 ConfigurationNode node;
33
34 /*** A child node of the regular node. */
35 ConfigurationNode child;
36
37 /*** An attribute node of the regular node. */
38 ConfigurationNode attr;
39
40 protected void setUp() throws Exception
41 {
42 super.setUp();
43 node = new DefaultConfigurationNode();
44 child = new DefaultConfigurationNode("child");
45 attr = new DefaultConfigurationNode("attr");
46 node.addChild(child);
47 node.addAttribute(attr);
48 viewNode = new ViewNode();
49 }
50
51 /***
52 * Tests adding a child to the view node.
53 */
54 public void testAddChild()
55 {
56 viewNode.addChild(child);
57 assertEquals("Parent was changed", node, child.getParentNode());
58 assertEquals("Child was not added", 1, viewNode.getChildrenCount());
59 }
60
61 /***
62 * Tests adding a null child to the view node. This should throw an
63 * exception.
64 */
65 public void testAddNullChild()
66 {
67 try
68 {
69 viewNode.addChild(null);
70 fail("Could add null child!");
71 }
72 catch (IllegalArgumentException iex)
73 {
74
75 }
76 }
77
78 /***
79 * Tests adding an attribute to the view node.
80 */
81 public void testAddAttribute()
82 {
83 viewNode.addAttribute(attr);
84 assertEquals("Parent was changed", node, attr.getParentNode());
85 assertEquals("Attribute was not added", 1, viewNode.getAttributeCount());
86 }
87
88 /***
89 * Tests adding a null attribute to the view node. This should cause an
90 * exception.
91 */
92 public void testAddNullAttribute()
93 {
94 try
95 {
96 viewNode.addAttribute(null);
97 fail("Could add null attribute");
98 }
99 catch (IllegalArgumentException iex)
100 {
101
102 }
103 }
104
105 /***
106 * Tests appending all children to a view node.
107 */
108 public void testAppendChildren()
109 {
110 viewNode.addChild(new DefaultConfigurationNode("testNode"));
111 viewNode.appendChildren(node);
112 assertEquals("Wrong number of children", 2, viewNode.getChildrenCount());
113 assertEquals("Cannot find child", child, viewNode.getChild(1));
114 assertEquals("Parent was changed", node, ((ConfigurationNode) viewNode
115 .getChild(1)).getParentNode());
116 }
117
118 /***
119 * Tests appending children from a null source. This should be a noop.
120 */
121 public void testAppendNullChildren()
122 {
123 viewNode.appendChildren(null);
124 assertEquals("Wrong number of children", 0, viewNode.getChildrenCount());
125 }
126
127 /***
128 * tests appending all attributes to a view node.
129 */
130 public void testAppendAttributes()
131 {
132 viewNode.appendAttributes(node);
133 assertEquals("Wrong number of attributes", 1, viewNode
134 .getAttributeCount());
135 assertEquals("Cannot find attribute", attr, viewNode.getAttribute(0));
136 assertEquals("Parent was changed", node, ((ConfigurationNode) viewNode
137 .getAttribute(0)).getParentNode());
138 }
139
140 /***
141 * Tests appending attributes from a null source. This should be a noop.
142 */
143 public void testAppendNullAttributes()
144 {
145 viewNode.appendAttributes(null);
146 assertEquals("Wrong number of attributes", 0, viewNode
147 .getAttributeCount());
148 }
149 }