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1
23
24 package com.sun.enterprise.cli.framework;
25
26 import java.io.BufferedReader  ;
27 import java.io.IOException ;
28 import java.io.PipedReader ;
29 import java.io.PipedWriter ;
30 import java.io.StringReader ;
31 import java.io.Writer ;
32 import junit.framework.*;
33
38
39 public class PagerTest extends TestCase {
40 public void testNegativeLinesPerPage() throws IOException {
41 final Pager m = new Pager(-1, new StringReader ("1\n2\n3"),
42 stdout.getWriter());
43 m.nextPage();
44 assertEquals("1", stdout.readLine());
45 assertEquals("2", stdout.readLine());
46 assertEquals("3", stdout.readLine());
47 assertTrue("Output should no longer be ready", !stdout.ready());
48 }
49
50 public void testHasNext() throws IOException {
51 final Pager m = new Pager(2, new StringReader ("1\n2\n3"),
52 stdout.getWriter());
53 assertTrue("Didn't expect anything in the output!",
54 !stdout.ready());
55 m.nextPage();
56 assertTrue(m.hasNext());
57 m.nextPage();
58 assertTrue(!m.hasNext());
59 }
60
61
62 public void testZeroLengthPage() throws IOException {
63 final Pager m = new Pager(0, new StringReader ("1\n2\n3\n4\n5\n6\n7"),
64 stdout.getWriter());
65 assertTrue("Didn't expect anything in the output!",
66 !stdout.ready());
67 m.nextPage();
68 assertTrue("Didn't expect anything in the output!",
69 !stdout.ready());
70 }
71
72
73
74
75 public void testMultiplePages() throws IOException {
76 final Pager m = new Pager(2, new StringReader ("1\n2\n3\n4\n5\n6\n7"), stdout.getWriter());
77 assertTrue("Didn't expect anything in the output!", !stdout.ready());
78 m.nextPage();
79 assertTrue("Expected something on the output!", stdout.ready());
80 assertEquals("1", stdout.readLine());
81 assertEquals("2", stdout.readLine());
82 assertTrue("Expected end of page 1", !stdout.ready());
83 m.nextPage();
84 assertTrue("Expected page 2 to be ready", stdout.ready());
85 assertEquals("3", stdout.readLine());
86 assertEquals("4", stdout.readLine());
87 assertTrue("Expected to be waiting for page 3", !stdout.ready());
88 m.nextPage();
89 assertEquals("5", stdout.readLine());
90 assertEquals("6", stdout.readLine());
91 assertTrue("Expected to be waiting for page 4", !stdout.ready());
92 m.nextPage();
93 assertEquals("7", stdout.readLine());
94 assertTrue("Expected end of page 4", !stdout.ready());
95 }
96
97 public void testSinglePage() throws IOException {
98 final Pager m = new Pager(2, new StringReader ("1\n2\n"), stdout.getWriter());
99 assertTrue("Didn't expect anything in the output!", !stdout.ready());
100 m.nextPage();
101 assertTrue("Expected something on the output!", stdout.ready());
102 assertEquals("1", stdout.readLine());
103 assertEquals("2", stdout.readLine());
104 assertTrue("Expected no more output", !stdout.ready());
105 }
106
107
108 public PagerTest(String name){
109 super(name);
110 }
111 Pipe stdout;
112 protected void setUp() throws IOException {
113 stdout = new Pipe();
114 }
115
116 protected void tearDown() {
117 }
118
119 private void nyi(){
120 fail("Not Yet Implemented");
121 }
122
123 public static void main(String args[]){
124 if (args.length == 0){
125 junit.textui.TestRunner.run(PagerTest.class);
126 } else {
127 junit.textui.TestRunner.run(makeSuite(args));
128 }
129 }
130 private static TestSuite makeSuite(String args[]){
131 final TestSuite ts = new TestSuite();
132 for (int i = 0; i < args.length; i++){
133 ts.addTest(new PagerTest(args[i]));
134 }
135 return ts;
136 }
137
138 class Pipe
139 {
140 PipedWriter pw = new PipedWriter ();
141 PipedReader pr = new PipedReader ();
142 BufferedReader br = new BufferedReader (pr);
143 Writer getWriter(){ return pw; }
144 BufferedReader getReader() { return br; }
145
146 Pipe() throws IOException { pr.connect(pw); }
147 String readLine() throws IOException {
148 return br.readLine();
149 }
150 boolean ready() throws IOException {
151 return br.ready();
152 }
153
154
155 }
156
157
158
159 }
160 |
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