/
evaluator_test.go
96 lines (84 loc) · 1.8 KB
/
evaluator_test.go
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
package evaluator
import (
"monkey_interpreter/lexer"
"monkey_interpreter/object"
"monkey_interpreter/parser"
"testing"
)
func TestEvalIntegerExpression(t *testing.T) {
tests := []struct {
input string
expected int64
}{
{"5", 5},
{"10", 10},
{"-5", -5},
{"-10", -10},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testIntegerObject(t, evaluated, tt.expected)
}
}
func testEval(input string) object.Object {
l := lexer.New(input)
p := parser.New(l)
program := p.ParseProgram()
return Eval(program)
}
func testIntegerObject(t *testing.T, obj object.Object, expected int64) bool {
result, ok := obj.(*object.Integer)
if !ok {
t.Errorf("object is not Integer. got=%T (%+v)", obj, obj)
return false
}
if result.Value != expected {
t.Errorf("object has wrong value. got=%d, want=%d",
result.Value, expected)
return false
}
return true
}
func TestEvalBooleanExpression(t *testing.T) {
tests := []struct {
input string
expected bool
}{
{"true", true},
{"false", false},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testBooleanObject(t, evaluated, tt.expected)
}
}
func testBooleanObject(t *testing.T, obj object.Object, expected bool) bool {
result, ok := obj.(*object.Boolean)
if !ok {
t.Errorf("object is not Boolean. got=%T (%+v)", obj, obj)
return false
}
if result.Value != expected {
t.Errorf("object has wrong value. got=%t, want=%t",
result.Value, expected)
return false
}
return true
}
func TestBangOperator(t *testing.T) {
tests := []struct {
input string
expected bool
}{
{"!true", false},
{"!false", true},
{"!5", false},
{"!!true", true},
{"!!false", false},
{"!!5", true},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testBooleanObject(t, evaluated, tt.expected)
}
}