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// Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package collections
import (
"errors"
"testing"
qt "github.com/frankban/quicktest"
)
var (
_ Slicer = (*tstSlicer)(nil)
_ Slicer = (*tstSlicerIn1)(nil)
_ Slicer = (*tstSlicerIn2)(nil)
_ testSlicerInterface = (*tstSlicerIn1)(nil)
_ testSlicerInterface = (*tstSlicerIn1)(nil)
)
type testSlicerInterface interface {
Name() string
}
type testSlicerInterfaces []testSlicerInterface
type tstSlicerIn1 struct {
TheName string
}
type tstSlicerIn2 struct {
TheName string
}
type tstSlicer struct {
TheName string
}
func (p *tstSlicerIn1) Slice(in interface{}) (interface{}, error) {
items := in.([]interface{})
result := make(testSlicerInterfaces, len(items))
for i, v := range items {
switch vv := v.(type) {
case testSlicerInterface:
result[i] = vv
default:
return nil, errors.New("invalid type")
}
}
return result, nil
}
func (p *tstSlicerIn2) Slice(in interface{}) (interface{}, error) {
items := in.([]interface{})
result := make(testSlicerInterfaces, len(items))
for i, v := range items {
switch vv := v.(type) {
case testSlicerInterface:
result[i] = vv
default:
return nil, errors.New("invalid type")
}
}
return result, nil
}
func (p *tstSlicerIn1) Name() string {
return p.TheName
}
func (p *tstSlicerIn2) Name() string {
return p.TheName
}
func (p *tstSlicer) Slice(in interface{}) (interface{}, error) {
items := in.([]interface{})
result := make(tstSlicers, len(items))
for i, v := range items {
switch vv := v.(type) {
case *tstSlicer:
result[i] = vv
default:
return nil, errors.New("invalid type")
}
}
return result, nil
}
type tstSlicers []*tstSlicer
func TestSlice(t *testing.T) {
t.Parallel()
c := qt.New(t)
for i, test := range []struct {
args []interface{}
expected interface{}
}{
{[]interface{}{"a", "b"}, []string{"a", "b"}},
{[]interface{}{&tstSlicer{"a"}, &tstSlicer{"b"}}, tstSlicers{&tstSlicer{"a"}, &tstSlicer{"b"}}},
{[]interface{}{&tstSlicer{"a"}, "b"}, []interface{}{&tstSlicer{"a"}, "b"}},
{[]interface{}{}, []interface{}{}},
{[]interface{}{nil}, []interface{}{nil}},
{[]interface{}{5, "b"}, []interface{}{5, "b"}},
{[]interface{}{&tstSlicerIn1{"a"}, &tstSlicerIn2{"b"}}, testSlicerInterfaces{&tstSlicerIn1{"a"}, &tstSlicerIn2{"b"}}},
{[]interface{}{&tstSlicerIn1{"a"}, &tstSlicer{"b"}}, []interface{}{&tstSlicerIn1{"a"}, &tstSlicer{"b"}}},
} {
errMsg := qt.Commentf("[%d] %v", i, test.args)
result := Slice(test.args...)
c.Assert(test.expected, qt.DeepEquals, result, errMsg)
}
}
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