HistoryTest.java revision 3062:15bdc18525ff 
1/*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @summary Test Completion
27 * @build HistoryTest
28 * @run testng HistoryTest
29 */
30
31import java.io.ByteArrayInputStream;
32import java.io.ByteArrayOutputStream;
33import java.io.PrintStream;
34import java.util.Arrays;
35import java.util.HashMap;
36import java.util.Map;
37import java.util.prefs.AbstractPreferences;
38import java.util.prefs.BackingStoreException;
39import jdk.internal.jline.console.history.MemoryHistory;
40
41import jdk.jshell.JShell;
42import jdk.jshell.SourceCodeAnalysis;
43import jdk.jshell.SourceCodeAnalysis.CompletionInfo;
44import org.testng.annotations.Test;
45import jdk.internal.jshell.tool.EditingHistory;
46
47import static org.testng.Assert.*;
48
49@Test
50public class HistoryTest {
51
52    public void testHistory() {
53        JShell eval = JShell.builder()
54                .in(new ByteArrayInputStream(new byte[0]))
55                .out(new PrintStream(new ByteArrayOutputStream()))
56                .err(new PrintStream(new ByteArrayOutputStream()))
57                .build();
58        SourceCodeAnalysis analysis = eval.sourceCodeAnalysis();
59        MemoryPreferences prefs = new MemoryPreferences(null, "");
60        EditingHistory history = new EditingHistory(prefs) {
61            @Override protected CompletionInfo analyzeCompletion(String input) {
62                return analysis.analyzeCompletion(input);
63            }
64        };
65        history.add("void test() {");
66        history.add("    System.err.println(1);");
67        history.add("}");
68        history.add("/exit");
69
70        previousAndAssert(history, "/exit");
71
72        history.previous(); history.previous(); history.previous();
73
74        history.add("void test() { /*changed*/");
75
76        previousAndAssert(history, "}");
77        previousAndAssert(history, "    System.err.println(1);");
78        previousAndAssert(history, "void test() {");
79
80        assertFalse(history.previous());
81
82        nextAndAssert(history, "    System.err.println(1);");
83        nextAndAssert(history, "}");
84        nextAndAssert(history, "");
85
86        history.add("    System.err.println(2);");
87        history.add("} /*changed*/");
88
89        assertEquals(history.size(), 7);
90
91        history.save();
92
93        history = new EditingHistory(prefs) {
94            @Override protected CompletionInfo analyzeCompletion(String input) {
95                return analysis.analyzeCompletion(input);
96            }
97        };
98
99        previousSnippetAndAssert(history, "void test() { /*changed*/");
100        previousSnippetAndAssert(history, "/exit");
101        previousSnippetAndAssert(history, "void test() {");
102
103        assertFalse(history.previousSnippet());
104
105        nextSnippetAndAssert(history, "/exit");
106        nextSnippetAndAssert(history, "void test() { /*changed*/");
107        nextSnippetAndAssert(history, "");
108
109        assertFalse(history.nextSnippet());
110
111        history.add("{");
112        history.add("}");
113
114        history.save();
115
116        history = new EditingHistory(prefs) {
117            @Override protected CompletionInfo analyzeCompletion(String input) {
118                return analysis.analyzeCompletion(input);
119            }
120        };
121
122        previousSnippetAndAssert(history, "{");
123        previousSnippetAndAssert(history, "void test() { /*changed*/");
124        previousSnippetAndAssert(history, "/exit");
125        previousSnippetAndAssert(history, "void test() {");
126
127        while (history.next());
128
129        history.add("/*current1*/");
130        history.add("/*current2*/");
131        history.add("/*current3*/");
132
133        assertEquals(history.currentSessionEntries(), Arrays.asList("/*current1*/", "/*current2*/", "/*current3*/"));
134
135        history.remove(0);
136
137        assertEquals(history.currentSessionEntries(), Arrays.asList("/*current1*/", "/*current2*/", "/*current3*/"));
138
139        while (history.size() > 2)
140            history.remove(0);
141
142        assertEquals(history.currentSessionEntries(), Arrays.asList("/*current2*/", "/*current3*/"));
143
144        for (int i = 0; i < MemoryHistory.DEFAULT_MAX_SIZE * 2; i++) {
145            history.add("/exit");
146        }
147
148        history.add("void test() { /*after full*/");
149        history.add("    System.err.println(1);");
150        history.add("}");
151
152        previousSnippetAndAssert(history, "void test() { /*after full*/");
153    }
154
155    public void testSaveOneHistory() {
156        JShell eval = JShell.builder()
157                .in(new ByteArrayInputStream(new byte[0]))
158                .out(new PrintStream(new ByteArrayOutputStream()))
159                .err(new PrintStream(new ByteArrayOutputStream()))
160                .build();
161        SourceCodeAnalysis analysis = eval.sourceCodeAnalysis();
162        MemoryPreferences prefs = new MemoryPreferences(null, "");
163        EditingHistory history = new EditingHistory(prefs) {
164            @Override protected CompletionInfo analyzeCompletion(String input) {
165                return analysis.analyzeCompletion(input);
166            }
167        };
168
169        history.add("first");
170        history.save();
171    }
172
173    private void previousAndAssert(EditingHistory history, String expected) {
174        assertTrue(history.previous());
175        assertEquals(history.current().toString(), expected);
176    }
177
178    private void nextAndAssert(EditingHistory history, String expected) {
179        assertTrue(history.next());
180        assertEquals(history.current().toString(), expected);
181    }
182
183    private void previousSnippetAndAssert(EditingHistory history, String expected) {
184        assertTrue(history.previousSnippet());
185        assertEquals(history.current().toString(), expected);
186    }
187
188    private void nextSnippetAndAssert(EditingHistory history, String expected) {
189        assertTrue(history.nextSnippet());
190        assertEquals(history.current().toString(), expected);
191    }
192
193    private static final class MemoryPreferences extends AbstractPreferences {
194
195        private final Map<String, String> key2Value = new HashMap<>();
196        private final Map<String, MemoryPreferences> key2SubNode = new HashMap<>();
197
198        public MemoryPreferences(AbstractPreferences parent, String name) {
199            super(parent, name);
200        }
201
202        @Override
203        protected void putSpi(String key, String value) {
204            key2Value.put(key, value);
205        }
206
207        @Override
208        protected String getSpi(String key) {
209            return key2Value.get(key);
210        }
211
212        @Override
213        protected void removeSpi(String key) {
214            key2Value.remove(key);
215        }
216
217        @Override
218        protected void removeNodeSpi() throws BackingStoreException {
219            ((MemoryPreferences) parent()).key2SubNode.remove(name());
220        }
221
222        @Override
223        protected String[] keysSpi() throws BackingStoreException {
224            return key2Value.keySet().toArray(new String[key2Value.size()]);
225        }
226
227        @Override
228        protected String[] childrenNamesSpi() throws BackingStoreException {
229            return key2SubNode.keySet().toArray(new String[key2SubNode.size()]);
230        }
231
232        @Override
233        protected AbstractPreferences childSpi(String name) {
234            return key2SubNode.computeIfAbsent(name, n -> new MemoryPreferences(this, n));
235        }
236
237        @Override
238        protected void syncSpi() throws BackingStoreException {}
239
240        @Override
241        protected void flushSpi() throws BackingStoreException {}
242
243    }
244
245}
246