1 package mergo_test
2
3 import (
4 "testing"
5
6 "dario.cat/mergo"
7 )
8
9 var testDataM = []struct {
10 M1 mapTest
11 M2 mapTest
12 WithOverrideEmptyValue bool
13 ExpectedMap map[int]int
14 }{
15 {
16 M1: mapTest{
17 M: map[int]int{1: 1, 3: 3},
18 },
19 M2: mapTest{
20 M: map[int]int{1: 2, 2: 2},
21 },
22 WithOverrideEmptyValue: true,
23 ExpectedMap: map[int]int{1: 1, 3: 3},
24 },
25 {
26 M1: mapTest{
27 M: map[int]int{1: 1, 3: 3},
28 },
29 M2: mapTest{
30 M: map[int]int{1: 2, 2: 2},
31 },
32 WithOverrideEmptyValue: false,
33 ExpectedMap: map[int]int{1: 1, 2: 2, 3: 3},
34 },
35 {
36 M1: mapTest{
37 M: map[int]int{},
38 },
39 M2: mapTest{
40 M: map[int]int{1: 2, 2: 2},
41 },
42 WithOverrideEmptyValue: true,
43 ExpectedMap: map[int]int{},
44 },
45 {
46 M1: mapTest{
47 M: map[int]int{},
48 },
49 M2: mapTest{
50 M: map[int]int{1: 2, 2: 2},
51 },
52 WithOverrideEmptyValue: false,
53 ExpectedMap: map[int]int{1: 2, 2: 2},
54 },
55 }
56
57 func withOverrideEmptyValue(enable bool) func(*mergo.Config) {
58 if enable {
59 return mergo.WithOverwriteWithEmptyValue
60 }
61
62 return mergo.WithOverride
63 }
64
65 func TestMergeMapWithOverride(t *testing.T) {
66 t.Parallel()
67
68 for _, data := range testDataM {
69 err := mergo.Merge(&data.M2, data.M1, withOverrideEmptyValue(data.WithOverrideEmptyValue))
70 if err != nil {
71 t.Errorf("Error while merging %s", err)
72 }
73
74 if len(data.M2.M) != len(data.ExpectedMap) {
75 t.Errorf("Got %d elements in map, but expected %d", len(data.M2.M), len(data.ExpectedMap))
76 return
77 }
78
79 for i, val := range data.M2.M {
80 if val != data.ExpectedMap[i] {
81 t.Errorf("Expected value: %d, but got %d while merging map", data.ExpectedMap[i], val)
82 }
83 }
84 }
85 }
86
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