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/*
* Copyright (C) 2009 Google Inc.
*
* 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.
*/
package com.google.common.base;
import com.google.common.collect.ImmutableMap;
import junit.framework.TestCase;
import java.util.Arrays;
import java.util.Map;
/**
* Tests for {@link Objects#toStringHelper(Object)}.
*
* @author Jason Lee
*/
public class ToStringHelperTest extends TestCase {
public void testConstructor_instance() {
String toTest = Objects.toStringHelper(this).toString();
assertEquals("ToStringHelperTest{}", toTest);
}
public void testConstructor_innerClass() {
String toTest = Objects.toStringHelper(new TestClass()).toString();
assertEquals("TestClass{}", toTest);
}
public void testConstructor_anonymousClass() {
String toTest = Objects.toStringHelper(new Object() {}).toString();
assertTrue(toTest.matches("[0-9]+\\{\\}"));
}
// all remaining test are on an inner class with various fields
public void testToString_oneField() {
String toTest = Objects.toStringHelper(new TestClass())
.add("field1", "Hello")
.toString();
assertEquals("TestClass{field1=Hello}", toTest);
}
public void testToString_complexFields() {
Map<String, Integer> map = ImmutableMap.<String, Integer>builder()
.put("abc", 1)
.put("def", 2)
.put("ghi", 3)
.build();
String toTest = Objects.toStringHelper(new TestClass())
.add("field1", "This is string.")
.add("field2", Arrays.asList("abc", "def", "ghi"))
.add("field3", map)
.toString();
final String expected = "TestClass{"
+ "field1=This is string., field2=[abc, def, ghi], field3={abc=1, def=2, ghi=3}}";
assertEquals(expected, toTest);
}
public void testToString_addWithNullName() {
Objects.ToStringHelper helper = Objects.toStringHelper(new TestClass());
try {
helper.add(null, "Hello");
fail("No exception was thrown.");
} catch (NullPointerException expected) {
}
}
public void testToString_addWithNullValue() {
final String result = Objects.toStringHelper(new TestClass())
.add("Hello", null)
.toString();
assertEquals("TestClass{Hello=null}", result);
}
public void testToString_addValue() {
String toTest = Objects.toStringHelper(new TestClass())
.add("field1", 1)
.addValue("value1")
.add("field2", "value2")
.addValue(2)
.toString();
final String expected = "TestClass{field1=1, value1, field2=value2, 2}";
assertEquals(expected, toTest);
}
public void testToString_addValueWithNullValue() {
final String result = Objects.toStringHelper(new TestClass())
.addValue(null)
.addValue("Hello")
.addValue(null)
.toString();
final String expected = "TestClass{null, Hello, null}";
assertEquals(expected, result);
}
/**
* Test class for testing formatting of inner classes.
*/
private static class TestClass {}
}
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