RegexParser/RegexParser.Tests/Transforms/QuantifierASTTransformTests.cs at master · aistrate/RegexParser · GitHub

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
using NUnit.Framework;
using RegexParser.Patterns;
using RegexParser.Tests.Asserts;
using RegexParser.Transforms;

namespace RegexParser.Tests.Transforms
{
    [TestFixture]
    public class QuantifierASTTransformTests
    {
        private BaseASTTransform transform = new QuantifierASTTransform();

        [Test]
        public void Quantifier_N_M()
        {
            string patternText = "a(bc){2,7}";

            BasePattern innerGroup = new GroupPattern(
                                            true,
                                            new CharEscapePattern('b'),
                                            new CharEscapePattern('c'));

            BasePattern expected = new GroupPattern(
                                            true,
                                            new CharEscapePattern('a'),
                                            new GroupPattern(
                                                    false,
                                                    new QuantifierPattern(innerGroup, 2, 2, true),
                                                    new QuantifierPattern(innerGroup, 0, 5, true)));

            RegexAssert.IsASTTransformCorrect(expected, patternText, transform);
        }

        [Test]
        public void Quantifier_N_Infinity()
        {
            string patternText = "a(bc){3,}";

            BasePattern innerGroup = new GroupPattern(
                                            true,
                                            new CharEscapePattern('b'),
                                            new CharEscapePattern('c'));

            BasePattern expected = new GroupPattern(
                                            true,
                                            new CharEscapePattern('a'),
                                            new GroupPattern(
                                                    false,
                                                    new QuantifierPattern(innerGroup, 3, 3, true),
                                                    new QuantifierPattern(innerGroup, 0, null, true)));

            RegexAssert.IsASTTransformCorrect(expected, patternText, transform);
        }

        [Test]
        public void Quantifier_Plus()
        {
            string patternText = "a(bc)+";

            BasePattern innerGroup = new GroupPattern(
                                            true,
                                            new CharEscapePattern('b'),
                                            new CharEscapePattern('c'));

            BasePattern expected = new GroupPattern(
                                            true,
                                            new CharEscapePattern('a'),
                                            new GroupPattern(
                                                    false,
                                                    innerGroup,
                                                    new QuantifierPattern(innerGroup, 0, null, true)));

            RegexAssert.IsASTTransformCorrect(expected, patternText, transform);
        }

        [Test]
        public void Quantifier_0_Infinity()
        {
            string patternText = "a(bc)*";

            BasePattern innerGroup = new GroupPattern(
                                            true,
                                            new CharEscapePattern('b'),
                                            new CharEscapePattern('c'));

            // Unchanged
            BasePattern expected = new GroupPattern(
                                            true,
                                            new CharEscapePattern('a'),
                                            new QuantifierPattern(innerGroup, 0, null, true));

            RegexAssert.IsASTTransformCorrect(expected, patternText, transform);
        }

        [Test]
        public void Quantifier_N()
        {
            string patternText = "a(bc){4}";

            BasePattern innerGroup = new GroupPattern(
                                            true,
                                            new CharEscapePattern('b'),
                                            new CharEscapePattern('c'));

            // Unchanged
            BasePattern expected = new GroupPattern(
                                            true,
                                            new CharEscapePattern('a'),
                                            new QuantifierPattern(innerGroup, 4, 4, true));

            RegexAssert.IsASTTransformCorrect(expected, patternText, transform);
        }

        [Test]
        public void Quantifier_1()
        {
            string patternText = "a(bc){1}";

            BasePattern innerGroup = new GroupPattern(
                                            true,
                                            new CharEscapePattern('b'),
                                            new CharEscapePattern('c'));

            BasePattern expected = new GroupPattern(
                                            true,
                                            new CharEscapePattern('a'),
                                            innerGroup);

            RegexAssert.IsASTTransformCorrect(expected, patternText, transform);
        }

        [Test]
        public void Quantifier_0()
        {
            string patternText = "a(bc){0}";

            BasePattern expected = new GroupPattern(
                                            true,
                                            new CharEscapePattern('a'));

            RegexAssert.IsASTTransformCorrect(expected, patternText, transform);
        }

        // TODO: uncomment when ExplicitCapture is working
        //[Test]
        //public void Quantifier_EmptyChild()
        //{
        //    // use ExplicitCapture
        //    string patternText = "a()+";

        //    BasePattern expected = new GroupPattern(
        //                                    true,
        //                                    new CharEscapePattern('a'));

        //    RegexAssert.IsASTTransformCorrect(expected, patternText, transform);
        //}
    }
}