slice_test.go (2982B)
1 // Copyright 2019 The Hugo Authors. All rights reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 // http://www.apache.org/licenses/LICENSE-2.0
7 //
8 // Unless required by applicable law or agreed to in writing, software
9 // distributed under the License is distributed on an "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 // See the License for the specific language governing permissions and
12 // limitations under the License.
13
14 package collections
15
16 import (
17 "errors"
18 "testing"
19
20 qt "github.com/frankban/quicktest"
21 )
22
23 var (
24 _ Slicer = (*tstSlicer)(nil)
25 _ Slicer = (*tstSlicerIn1)(nil)
26 _ Slicer = (*tstSlicerIn2)(nil)
27 _ testSlicerInterface = (*tstSlicerIn1)(nil)
28 _ testSlicerInterface = (*tstSlicerIn1)(nil)
29 )
30
31 type testSlicerInterface interface {
32 Name() string
33 }
34
35 type testSlicerInterfaces []testSlicerInterface
36
37 type tstSlicerIn1 struct {
38 TheName string
39 }
40
41 type tstSlicerIn2 struct {
42 TheName string
43 }
44
45 type tstSlicer struct {
46 TheName string
47 }
48
49 func (p *tstSlicerIn1) Slice(in any) (any, error) {
50 items := in.([]any)
51 result := make(testSlicerInterfaces, len(items))
52 for i, v := range items {
53 switch vv := v.(type) {
54 case testSlicerInterface:
55 result[i] = vv
56 default:
57 return nil, errors.New("invalid type")
58 }
59 }
60 return result, nil
61 }
62
63 func (p *tstSlicerIn2) Slice(in any) (any, error) {
64 items := in.([]any)
65 result := make(testSlicerInterfaces, len(items))
66 for i, v := range items {
67 switch vv := v.(type) {
68 case testSlicerInterface:
69 result[i] = vv
70 default:
71 return nil, errors.New("invalid type")
72 }
73 }
74 return result, nil
75 }
76
77 func (p *tstSlicerIn1) Name() string {
78 return p.TheName
79 }
80
81 func (p *tstSlicerIn2) Name() string {
82 return p.TheName
83 }
84
85 func (p *tstSlicer) Slice(in any) (any, error) {
86 items := in.([]any)
87 result := make(tstSlicers, len(items))
88 for i, v := range items {
89 switch vv := v.(type) {
90 case *tstSlicer:
91 result[i] = vv
92 default:
93 return nil, errors.New("invalid type")
94 }
95 }
96 return result, nil
97 }
98
99 type tstSlicers []*tstSlicer
100
101 func TestSlice(t *testing.T) {
102 t.Parallel()
103 c := qt.New(t)
104
105 for i, test := range []struct {
106 args []any
107 expected any
108 }{
109 {[]any{"a", "b"}, []string{"a", "b"}},
110 {[]any{&tstSlicer{"a"}, &tstSlicer{"b"}}, tstSlicers{&tstSlicer{"a"}, &tstSlicer{"b"}}},
111 {[]any{&tstSlicer{"a"}, "b"}, []any{&tstSlicer{"a"}, "b"}},
112 {[]any{}, []any{}},
113 {[]any{nil}, []any{nil}},
114 {[]any{5, "b"}, []any{5, "b"}},
115 {[]any{&tstSlicerIn1{"a"}, &tstSlicerIn2{"b"}}, testSlicerInterfaces{&tstSlicerIn1{"a"}, &tstSlicerIn2{"b"}}},
116 {[]any{&tstSlicerIn1{"a"}, &tstSlicer{"b"}}, []any{&tstSlicerIn1{"a"}, &tstSlicer{"b"}}},
117 } {
118 errMsg := qt.Commentf("[%d] %v", i, test.args)
119
120 result := Slice(test.args...)
121
122 c.Assert(test.expected, qt.DeepEquals, result, errMsg)
123 }
124 }