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// Copyright 2017 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 (
"fmt"
"testing"
"github.com/gohugoio/hugo/deps"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestIndex(t *testing.T) {
t.Parallel()
ns := New(&deps.Deps{})
for i, test := range []struct {
item interface{}
indices []interface{}
expect interface{}
isErr bool
}{
{[]int{0, 1}, []interface{}{0}, 0, false},
{[]int{0, 1}, []interface{}{9}, nil, false}, // index out of range
{[]uint{0, 1}, nil, []uint{0, 1}, false},
{[][]int{{1, 2}, {3, 4}}, []interface{}{0, 0}, 1, false},
{map[int]int{1: 10, 2: 20}, []interface{}{1}, 10, false},
{map[int]int{1: 10, 2: 20}, []interface{}{0}, 0, false},
// errors
{nil, nil, nil, true},
{[]int{0, 1}, []interface{}{"1"}, nil, true},
{[]int{0, 1}, []interface{}{nil}, nil, true},
{tstNoStringer{}, []interface{}{0}, nil, true},
} {
errMsg := fmt.Sprintf("[%d] %v", i, test)
result, err := ns.Index(test.item, test.indices...)
if test.isErr {
require.Error(t, err, errMsg)
continue
}
require.NoError(t, err, errMsg)
assert.Equal(t, test.expect, result, errMsg)
}
}
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