diff options
Diffstat (limited to 'common/collections/slice_test.go')
-rw-r--r-- | common/collections/slice_test.go | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/common/collections/slice_test.go b/common/collections/slice_test.go new file mode 100644 index 000000000..fd8eb24f1 --- /dev/null +++ b/common/collections/slice_test.go @@ -0,0 +1,125 @@ +// 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" + "fmt" + "testing" + + "github.com/alecthomas/assert" +) + +var _ Slicer = (*tstSlicer)(nil) +var _ Slicer = (*tstSlicerIn1)(nil) +var _ Slicer = (*tstSlicerIn2)(nil) +var _ testSlicerInterface = (*tstSlicerIn1)(nil) +var _ testSlicerInterface = (*tstSlicerIn1)(nil) + +type testSlicerInterface interface { + Name() string +} + +type testSlicerInterfaces []testSlicerInterface + +type tstSlicerIn1 struct { + name string +} + +type tstSlicerIn2 struct { + name string +} + +type tstSlicer struct { + name 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.name +} + +func (p *tstSlicerIn2) Name() string { + return p.name +} + +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() + + 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 := fmt.Sprintf("[%d] %v", i, test.args) + + result := Slice(test.args...) + + assert.Equal(t, test.expected, result, errMsg) + } + + assert.Len(t, Slice(), 0) +} |