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
|
const { parse } = require('../src/parser.js')
describe('parse', () => {
describe('error handling', () => {
it('throws when a binary operation lacks an argument', () => {
expect(() => { parse('1d') }).toThrow(/Syntax error/)
expect(() => { parse('2+3+') }).toThrow(/Syntax error/)
})
it('throws when two binary operations follow each other', () => {
expect(() => { parse('1++2') }).toThrow(/Syntax error/)
})
it('throws when two dice not combined with a binary operation', () => {
expect(() => { parse('(1d4)(1d6)') }).toThrow(/Syntax error/)
expect(() => { parse('1 2') }).toThrow(/Syntax error/)
})
})
it('parses a constant', () => {
expect(parse('5')).toEqual({ type: 'constant', value: 5 })
})
it('parses a simple die with no left side', () => {
expect(parse('d6')).toEqual({
type: 'd',
left: { type: 'constant', value: 1 },
right: { type: 'constant', value: 6 }
})
})
it('parses a simple die (1d6)', () => {
expect(parse('1d6')).toEqual({
type: 'd',
left: { type: 'constant', value: 1 },
right: { type: 'constant', value: 6 }
})
})
it('parses a simple die (10d42)', () => {
expect(parse('10d42')).toEqual({
type: 'd',
left: { type: 'constant', value: 10 },
right: { type: 'constant', value: 42 }
})
})
it('parses a compound die (1d2d3)', () => {
expect(parse('1d2d3')).toEqual({
type: 'd',
left: { type: 'constant', value: 1 },
right: {
type: 'd',
left: { type: 'constant', value: 2 },
right: { type: 'constant', value: 3 }
}
})
})
it('parses constant addition', () => {
expect(parse('1 + 2')).toEqual({
type: 'add',
left: { type: 'constant', value: 1 },
right: { type: 'constant', value: 2 }
})
})
it('parses dice addition', () => {
expect(parse('2d8 + d6')).toEqual({
type: 'add',
left: {
type: 'd',
left: { type: 'constant', value: 2 },
right: { type: 'constant', value: 8 }
},
right: {
type: 'd',
left: { type: 'constant', value: 1 },
right: { type: 'constant', value: 6 }
}
})
})
it('parses dice subtraction', () => {
expect(parse('1d6 - 2d8')).toEqual({
type: 'subtract',
left: {
type: 'd',
left: { type: 'constant', value: 1 },
right: { type: 'constant', value: 6 }
},
right: {
type: 'd',
left: { type: 'constant', value: 2 },
right: { type: 'constant', value: 8 }
}
})
})
it('parses negatives', () => {
expect(parse('-1 + (-(2d6))')).toEqual({
type: 'add',
left: {
type: 'negative',
value: { type: 'constant', value: 1 }
},
right: {
type: 'negative',
value: {
type: 'd',
left: { type: 'constant', value: 2 },
right: { type: 'constant', value: 6 }
}
}
})
})
it('parses exploding dice', () => {
expect(parse('1E1d6')).toEqual({
type: 'E',
left: { type: 'constant', value: 1 },
right: {
type: 'd',
left: { type: 'constant', value: 1 },
right: { type: 'constant', value: 6 }
}
})
})
it('parses dice with keep', () => {
expect(parse('1K2d20')).toEqual({
type: 'K',
left: { type: 'constant', value: 1 },
right: {
type: 'd',
left: { type: 'constant', value: 2 },
right: { type: 'constant', value: 20 }
}
})
})
describe('parsing parentheses', () => {
test('(1d6)d6', () => {
expect(parse('(1d6)d6')).toEqual({
type: 'd',
left: {
type: 'd',
left: { type: 'constant', value: 1 },
right: { type: 'constant', value: 6 }
},
right: { type: 'constant', value: 6 },
})
})
test('2d(6 + 3)d4', () => {
expect(parse('2d(6 + 3)d4')).toEqual({
type: 'd',
left: { type: 'constant', value: 2 },
right: {
type: 'd',
left: {
type: 'add',
left: { type: 'constant', value: 6 },
right: { type: 'constant', value: 3 }
},
right: { type: 'constant', value: 4 }
},
})
})
})
})
|