hugo/tpl/collections/append_test.go
Bjørn Erik Pedersen 31a8bb8c07 common/maps: Improve append in Scratch
This commit consolidates the reflective collections handling in `.Scratch` vs the `tpl` package so they use the same code paths.

This commit also adds support for a corner case where a typed slice is appended to a nil or empty `[]interface{}`.

Fixes #5275
2018-10-08 12:30:50 +02:00

67 lines
1.8 KiB
Go

// Copyright 2018 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"
"reflect"
"testing"
"github.com/gohugoio/hugo/deps"
"github.com/stretchr/testify/require"
)
// Also see tests in common/collection.
func TestAppend(t *testing.T) {
t.Parallel()
ns := New(&deps.Deps{})
for i, test := range []struct {
start interface{}
addend []interface{}
expected interface{}
}{
{[]string{"a", "b"}, []interface{}{"c"}, []string{"a", "b", "c"}},
{[]string{"a", "b"}, []interface{}{"c", "d", "e"}, []string{"a", "b", "c", "d", "e"}},
{[]string{"a", "b"}, []interface{}{[]string{"c", "d", "e"}}, []string{"a", "b", "c", "d", "e"}},
// Errors
{"", []interface{}{[]string{"a", "b"}}, false},
{[]string{"a", "b"}, []interface{}{}, false},
// No string concatenation.
{"ab",
[]interface{}{"c"},
false},
} {
errMsg := fmt.Sprintf("[%d]", i)
args := append(test.addend, test.start)
result, err := ns.Append(args...)
if b, ok := test.expected.(bool); ok && !b {
require.Error(t, err, errMsg)
continue
}
require.NoError(t, err, errMsg)
if !reflect.DeepEqual(test.expected, result) {
t.Fatalf("%s got\n%T: %v\nexpected\n%T: %v", errMsg, result, result, test.expected, test.expected)
}
}
}