1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.el.parser;
import jakarta.el.ELException;
import jakarta.el.ELProcessor;
import org.junit.Assert;
import org.junit.Test;
public class TestAstLambdaExpression {
@Test
public void testSpec01() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("(x->x+1)(1)", Integer.class);
Assert.assertEquals(Integer.valueOf(2), result);
}
@Test
public void testSpec02() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("((x,y)->x+y)(1,2)", Integer.class);
Assert.assertEquals(Integer.valueOf(3), result);
}
@Test
public void testSpec03() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("(()->64)", Integer.class);
Assert.assertEquals(Integer.valueOf(64), result);
}
@Test
public void testSpec04() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("v = (x,y)->x+y; v(3,4)", Integer.class);
Assert.assertEquals(Integer.valueOf(7), result);
}
@Test
public void testSpec05() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("fact = n -> n==0? 1: n*fact(n-1); fact(5)",
Integer.class);
Assert.assertEquals(Integer.valueOf(120), result);
}
@Test
public void testSpec06() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("(x->y->x-y)(2)(1)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testInvocation01() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("(()->2)()",
Integer.class);
Assert.assertEquals(Integer.valueOf(2), result);
}
@Test
public void testNested01() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("(()->y->2-y)()(1)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testNested02() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("(()->y->()->2-y)()(1)()",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test(expected=ELException.class)
public void testNested03() {
ELProcessor processor = new ELProcessor();
// More method parameters than there are nested lambda expressions
processor.getValue("(()->y->()->2-y)()(1)()()",
Integer.class);
}
@Test
public void testNested04() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("(()->y->()->x->x-y)()(1)()(2)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testNested05() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("(()->y->()->()->x->x-y)()(1)()()(2)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testNested06() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("(()->y->()->()->x->x-y)()(1)()(3)(2)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testNested07() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("()->()->()->42",
Integer.class);
Assert.assertEquals(Integer.valueOf(42), result);
}
@Test
public void testLambdaAsFunction01() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("v = (x->y->x-y); v(2)(1)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testLambdaAsFunction02() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("v = (()->y->2-y); v()(1)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testLambdaAsFunction03() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("v = (()->y->()->2-y); v()(1)()",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test(expected=ELException.class)
public void testLambdaAsFunction04() {
ELProcessor processor = new ELProcessor();
// More method parameters than there are nested lambda expressions
processor.getValue("v = (()->y->()->2-y); v()(1)()()",
Integer.class);
}
@Test
public void testLambdaAsFunction05() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("v = (()->y->()->x->x-y); v()(1)()(2)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testLambdaAsFunction06() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("v = (()->y->()->()->x->x-y); v()(1)()()(2)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test
public void testLambdaAsFunction07() {
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("v = (()->y->()->()->x->x-y); v()(1)()(3)(2)",
Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
@Test(expected=ELException.class)
public void testLambdaAsFunction08() {
// Using a name space for the function is not allowed
ELProcessor processor = new ELProcessor();
Object result =
processor.getValue("foo:v = (x)->x+1; foo:v(0)", Integer.class);
Assert.assertEquals(Integer.valueOf(1), result);
}
}
|
