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1
33
34
72
73 package edu.rice.cs.util;
74
75 import edu.rice.cs.drjava.DrJavaTestCase;
76
77 import java.io.BufferedReader  ;
78 import java.io.IOException ;
79 import java.io.InputStreamReader ;
80
81
84 public class StreamRedirectorTest extends DrJavaTestCase {
85
88 public void testEmptyInput() throws IOException {
89 InputStreamRedirector isr = new InputStreamRedirector() {
90 protected String _getInput() {
91 return "";
92 }
93 };
94 try {
95 isr.read();
96 fail("Should have thrown IOException on empty input!");
97 }
98 catch (IOException ioe) {
99 }
101 }
102
103
106 public void testStaticInput() throws IOException {
107 InputStreamRedirector isr = new InputStreamRedirector() {
108 protected String _getInput() {
109 return "Hello World!\n";
110 }
111 };
112 BufferedReader br = new BufferedReader (new InputStreamReader (isr));
113 assertEquals("First read", "Hello World!", br.readLine());
114 assertEquals("Second read", "Hello World!", br.readLine()); }
116
117
120 public void testDynamicInput() throws IOException {
121 InputStreamRedirector isr = new InputStreamRedirector() {
122 int x = -1;
123 protected String _getInput() {
124 x++;
125 return x + "\n";
126 }
127 };
128 BufferedReader br = new BufferedReader (new InputStreamReader (isr));
129 assertEquals("First read", "0", br.readLine());
130 assertEquals("Second read", "1", br.readLine());
132 assertEquals("Third read", "2", br.readLine());
133 }
134
135
139 public void testMultiLineInput() throws IOException {
140 InputStreamRedirector isr = new InputStreamRedirector() {
141 private boolean alreadyCalled = false;
142
143 protected String _getInput() {
144 if (alreadyCalled) {
145 throw new RuntimeException ("_getInput() has already been called!");
146 }
147 alreadyCalled = true;
148 return "Line 1\nLine 2\n";
149 }
150 };
151 BufferedReader br = new BufferedReader (new InputStreamReader (isr));
152 assertEquals("First read calls _getInput()", "Line 1", br.readLine());
153 assertEquals("First read does not call _getInput()", "Line 2", br.readLine());
154 try {
155 br.readLine();
156 fail("_getInput() should be called again!");
157 }
158 catch(RuntimeException re) {
159 assertEquals("Should have thrown correct exception.",
160 "_getInput() has already been called!", re.getMessage());
161 }
162 }
163 } |
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