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16 package org.apache.commons.jxpath.util;
17
18 import java.lang.reflect.Array  ;
19 import java.math.BigDecimal ;
20 import java.util.ArrayList ;
21 import java.util.Arrays ;
22 import java.util.Collections ;
23 import java.util.Date ;
24 import java.util.List ;
25
26 import junit.framework.TestCase;
27
28 import org.apache.commons.jxpath.NodeSet;
29 import org.apache.commons.jxpath.Pointer;
30
31
37
38 public class BasicTypeConverterTest extends TestCase {
39
44 public BasicTypeConverterTest(String name) {
45 super(name);
46 }
47
48 public void testPrimitiveToString() {
49 assertConversion(new Integer (1), String .class, "1");
50 }
51
52 public void testArrayToList() {
53 assertConversion(
54 new int[] { 1, 2 },
55 List .class,
56 Arrays.asList(new Object [] { new Integer (1), new Integer (2)}));
57 }
58
59 public void testArrayToArray() {
60 assertConversion(
61 new int[] { 1, 2 },
62 String [].class,
63 Arrays.asList(new String [] { "1", "2" }));
64 }
65
66 public void testListToArray() {
67 assertConversion(
68 Arrays.asList(new Integer [] { new Integer (1), new Integer (2)}),
69 String [].class,
70 Arrays.asList(new String [] { "1", "2" }));
71
72 assertConversion(
73 Arrays.asList(new String [] { "1", "2" }),
74 int[].class,
75 Arrays.asList(new Integer [] { new Integer (1), new Integer (2)}));
76 }
77
78 public void testInvalidConversion() {
79 boolean exception = false;
80 try {
81 TypeUtils.convert("'foo'", Date .class);
82 }
83 catch (Throwable ex) {
84 exception = true;
85 }
86 assertTrue("Type conversion exception", exception);
87 }
88
89 public void assertConversion(Object from, Class toType, Object expected) {
90 boolean can = TypeUtils.canConvert(from, toType);
91 assertTrue("Can convert: " + from.getClass() + " to " + toType, can);
92 Object result = TypeUtils.convert(from, toType);
93 if (result.getClass().isArray()) {
94 ArrayList list = new ArrayList ();
95 for (int j = 0; j < Array.getLength(result); j++) {
96 list.add(Array.get(result, j));
97 }
98 result = list;
99 }
100 assertEquals(
101 "Convert: " + from.getClass() + " to " + toType,
102 expected,
103 result);
104 }
105
106 public void testSingletonCollectionToString() {
107 assertConversion(Collections.singleton("Earth"), String .class, "Earth");
108 }
109
110 public void testSingletonArrayToString() {
111 assertConversion(new String [] { "Earth" }, String .class, "Earth");
112 }
113
114 public void testPointerToString() {
115 assertConversion(new Pointer() {
116 public Object getValue() {
117 return "value";
118 }
119 public Object getNode() {
120 return null;
121 }
122 public void setValue(Object value) {
123 }
124 public Object getRootNode() {
125 return null;
126 }
127 public String asPath() {
128 return null;
129 }
130 public Object clone() {
131 return null;
132 }
133 public int compareTo(Object o) {
134 return 0;
135 }
136 }, String .class, "value");
137 }
138
139 public void testNodeSetToString() {
140 assertConversion(new NodeSet() {
141 public List getNodes() {
142 return null;
143 }
144 public List getPointers() {
145 return null;
146 }
147 public List getValues() {
148 List list = new ArrayList ();
149 list.add("hello");
150 list.add("goodbye");
151 return Collections.singletonList(list);
152 }
153 }, String .class, "hello");
154 }
155
156 public void testNodeSetToInteger() {
158 assertConversion(new NodeSet() {
159 public List getNodes() {
160 return null;
161 }
162 public List getPointers() {
163 return null;
164 }
165 public List getValues() {
166 return Collections.singletonList("9");
167 }
168 }, Integer .class, new Integer (9));
169 }
170
171 public void testBeanUtilsConverter() {
172 assertConversion("12", BigDecimal .class, new BigDecimal (12));
173 }
174 } |
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