github.com/graemephi/kahugo@v0.62.3-0.20211121071557-d78c0423784d/common/collections/slice_test.go (about)

     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 interface{}) (interface{}, error) {
    50  	items := in.([]interface{})
    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 interface{}) (interface{}, error) {
    64  	items := in.([]interface{})
    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 interface{}) (interface{}, error) {
    86  	items := in.([]interface{})
    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     []interface{}
   107  		expected interface{}
   108  	}{
   109  		{[]interface{}{"a", "b"}, []string{"a", "b"}},
   110  		{[]interface{}{&tstSlicer{"a"}, &tstSlicer{"b"}}, tstSlicers{&tstSlicer{"a"}, &tstSlicer{"b"}}},
   111  		{[]interface{}{&tstSlicer{"a"}, "b"}, []interface{}{&tstSlicer{"a"}, "b"}},
   112  		{[]interface{}{}, []interface{}{}},
   113  		{[]interface{}{nil}, []interface{}{nil}},
   114  		{[]interface{}{5, "b"}, []interface{}{5, "b"}},
   115  		{[]interface{}{&tstSlicerIn1{"a"}, &tstSlicerIn2{"b"}}, testSlicerInterfaces{&tstSlicerIn1{"a"}, &tstSlicerIn2{"b"}}},
   116  		{[]interface{}{&tstSlicerIn1{"a"}, &tstSlicer{"b"}}, []interface{}{&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  }