TestRewriteRuleTokenStream.m revision 324c4644fee44b9898524c09511bd33c3f12e2df 
1// [The "BSD licence"]
2// Copyright (c) 2007 Kay Roepke
3// All rights reserved.
4//
5// Redistribution and use in source and binary forms, with or without
6// modification, are permitted provided that the following conditions
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8// 1. Redistributions of source code must retain the above copyright
9//    notice, this list of conditions and the following disclaimer.
10// 2. Redistributions in binary form must reproduce the above copyright
11//    notice, this list of conditions and the following disclaimer in the
12//    documentation and/or other materials provided with the distribution.
13// 3. The name of the author may not be used to endorse or promote products
14//    derived from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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25// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27#import "TestRewriteRuleTokenStream.h"
28#import "ANTLRRewriteRuleTokenStream.h"
29#import "ANTLRCommonTreeAdaptor.h"
30#import "ANTLRCommonToken.h"
31
32@implementation TestRewriteRuleTokenStream
33
34- (void) setUp
35{
36    treeAdaptor = [ANTLRCommonTreeAdaptor newTreeAdaptor];
37    stream = [ANTLRRewriteRuleTokenStream newANTLRRewriteRuleTokenStream:treeAdaptor
38                                                          description:@"rewrite rule token stream"];
39    token1 = [ANTLRCommonToken newToken:5];
40    token2 = [ANTLRCommonToken newToken:6];
41    token3 = [ANTLRCommonToken newToken:7];
42    token4 = [ANTLRCommonToken newToken:8];
43    [token1 setText:@"token 1"];
44    [token2 setText:@"token 2"];
45    [token3 setText:@"token 3"];
46    [token4 setText:@"token 4"];
47}
48
49- (void) tearDown
50{
51    [token1 release]; token1 = nil;
52    [token2 release]; token2 = nil;
53    [token3 release]; token3 = nil;
54    [token4 release]; token4 = nil;
55    
56    [treeAdaptor release]; treeAdaptor = nil;
57    [stream release]; stream = nil;
58}
59
60- (void) test01EmptyRewriteStream
61{
62    treeAdaptor = [ANTLRCommonTreeAdaptor newTreeAdaptor];
63    stream = [ANTLRRewriteRuleTokenStream newANTLRRewriteRuleTokenStream:treeAdaptor
64                                                             description:@"rewrite rule token stream"];
65    STAssertFalse([stream hasNext], @"-(BOOL)hasNext should be NO, but isn't");
66    STAssertThrows([stream nextToken], @"-next on empty stream should throw exception, but doesn't");
67}
68
69- (void) test02RewriteStreamCount
70{
71    treeAdaptor = [ANTLRCommonTreeAdaptor newTreeAdaptor];
72    stream = [ANTLRRewriteRuleTokenStream newANTLRRewriteRuleTokenStream:treeAdaptor
73                                                             description:@"rewrite rule token stream"];
74    token1 = [ANTLRCommonToken newToken:5];
75    token2 = [ANTLRCommonToken newToken:6];
76    [token1 setText:@"token 1"];
77    [token2 setText:@"token 2"];
78    STAssertTrue([stream size] == 0,
79                 @"empty stream should have count==0");
80    [stream addElement:token1];
81    STAssertTrue([stream size] == 1,
82                 @"single element stream should have count==1");
83    [stream addElement:token2];
84    STAssertTrue([stream size] == 2,
85                 @"multiple stream should have count==2");
86
87}
88
89- (void) test03SingleElement
90{
91    treeAdaptor = [ANTLRCommonTreeAdaptor newTreeAdaptor];
92    stream = [ANTLRRewriteRuleTokenStream newANTLRRewriteRuleTokenStream:treeAdaptor
93                                                             description:@"rewrite rule token stream"];
94    token1 = [ANTLRCommonToken newToken:5];
95    token2 = [ANTLRCommonToken newToken:6];
96    token3 = [ANTLRCommonToken newToken:7];
97    token4 = [ANTLRCommonToken newToken:8];
98    [token1 setText:@"token 1"];
99    [token2 setText:@"token 2"];
100    [token3 setText:@"token 3"];
101    [token4 setText:@"token 4"];
102    [stream addElement:token1];
103    STAssertTrue([stream hasNext], @"-hasNext should be YES, but isn't");
104    ANTLRCommonTree *tree = [stream nextNode];
105    STAssertEqualObjects([tree getToken], token1, @"return token from stream should be token1, but isn't");
106}
107
108- (void) test04SingleElementDup
109{
110    [stream addElement:token1];
111    ANTLRCommonTree *tree1, *tree2;
112    STAssertNoThrow(tree1 = [stream nextNode],
113                    @"stream iteration should not throw exception"
114                    );
115    STAssertNoThrow(tree2 = [stream nextNode],
116                    @"stream iteration past element count (single element) should not throw exception"
117                    );
118    STAssertEqualObjects([tree1 getToken], [tree2 getToken],
119                         @"tokens should be the same");
120    STAssertFalse(tree1 == tree2, 
121                         @"trees should be different, but aren't");
122}
123
124- (void) test05MultipleElements
125{
126    [stream addElement:token1];
127    [stream addElement:token2];
128    [stream addElement:token3];
129    ANTLRCommonTree *tree1, *tree2, *tree3, *tree4;
130    STAssertNoThrow(tree1 = [stream nextNode],
131                    @"stream iteration should not throw exception"
132                    );
133    STAssertEqualObjects([tree1 getToken], token1,
134                         @"[tree1 token] should be equal to token1"
135                         );
136    STAssertNoThrow(tree2 = [stream nextNode],
137                    @"stream iteration should not throw exception"
138                    );
139    STAssertEqualObjects([tree2 getToken], token2,
140                         @"[tree2 token] should be equal to token2"
141                         );
142    STAssertNoThrow(tree3 = [stream nextNode],
143                    @"stream iteration should not throw exception"
144                    );
145    STAssertEqualObjects([tree3 getToken], token3,
146                         @"[tree3 token] should be equal to token3"
147                         );
148    STAssertThrows(tree4 = [stream nextNode],
149                    @"iterating beyond end of stream should throw an exception"
150                    );
151}
152
153- (void) test06MultipleElementsAfterReset
154{
155    [stream addElement:token1];
156    [stream addElement:token2];
157    [stream addElement:token3];
158    ANTLRCommonTree *tree1, *tree2, *tree3;
159    
160    // consume the stream completely
161    STAssertNoThrow(tree1 = [stream nextNode],
162                    @"stream iteration should not throw exception"
163                    );
164    STAssertEqualObjects([tree1 getToken], token1,
165                         @"[tree1 token] should be equal to token1"
166                         );
167    STAssertNoThrow(tree2 = [stream nextNode],
168                    @"stream iteration should not throw exception"
169                    );
170    STAssertEqualObjects([tree2 getToken], token2,
171                         @"[tree2 token] should be equal to token2"
172                         );
173    STAssertNoThrow(tree3 = [stream nextNode],
174                    @"stream iteration should not throw exception"
175                    );
176    
177    [stream reset]; // after resetting the stream it should dup
178    
179    ANTLRCommonTree *tree1Dup, *tree2Dup, *tree3Dup;
180
181    STAssertNoThrow(tree1Dup = [stream nextNode],
182                    @"stream iteration should not throw exception"
183                    );
184    STAssertTrue(tree1 != tree1Dup,
185                 @"[tree1 token] should be equal to token1"
186                 );
187    STAssertNoThrow(tree2Dup = [stream nextNode],
188                    @"stream iteration should not throw exception"
189                    );
190    STAssertTrue(tree2 != tree2Dup,
191                 @"[tree2 token] should be equal to token2"
192                 );
193    STAssertNoThrow(tree3Dup = [stream nextNode],
194                    @"stream iteration should not throw exception"
195                    );
196    STAssertTrue(tree3 != tree3Dup,
197                 @"[tree3 token] should be equal to token3"
198                 );
199}
200
201@end
202