hugo/tpl/internal/go_templates/texttemplate/hugo_template_test.go
Bjørn Erik Pedersen a03c631c42
Rework template handling for function and map lookups
This is a big commit, but it deletes lots of code and simplifies a lot.

* Resolving the template funcs at execution time means we don't have to create template clones per site
* Having a custom map resolver means that we can remove the AST lower case transformation for the special lower case Params map

Not only is the above easier to reason about, it's also faster, especially if you have more than one language, as in the benchmark below:

```
name                          old time/op    new time/op    delta
SiteNew/Deep_content_tree-16    53.7ms ± 0%    48.1ms ± 2%  -10.38%  (p=0.029 n=4+4)

name                          old alloc/op   new alloc/op   delta
SiteNew/Deep_content_tree-16    41.0MB ± 0%    36.8MB ± 0%  -10.26%  (p=0.029 n=4+4)

name                          old allocs/op  new allocs/op  delta
SiteNew/Deep_content_tree-16      481k ± 0%      410k ± 0%  -14.66%  (p=0.029 n=4+4)
```

This should be even better if you also have lots of templates.

Closes #6594
2019-12-12 10:04:35 +01:00

71 lines
1.6 KiB
Go

// 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 template
import (
"bytes"
"reflect"
"strings"
"testing"
qt "github.com/frankban/quicktest"
)
type TestStruct struct {
S string
M map[string]string
}
type execHelper struct {
}
func (e *execHelper) GetFunc(name string) (reflect.Value, bool) {
if name == "print" {
return zero, false
}
return reflect.ValueOf(func(s string) string {
return "hello " + s
}), true
}
func (e *execHelper) GetMapValue(m, key reflect.Value) (reflect.Value, bool) {
key = reflect.ValueOf(strings.ToLower(key.String()))
return m.MapIndex(key), true
}
func TestTemplateExecutor(t *testing.T) {
c := qt.New(t)
templ, err := New("").Parse(`
{{ print "foo" }}
{{ printf "hugo" }}
Map: {{ .M.A }}
`)
c.Assert(err, qt.IsNil)
ex := NewExecuter(&execHelper{})
var b bytes.Buffer
data := TestStruct{S: "sv", M: map[string]string{"a": "av"}}
c.Assert(ex.Execute(templ, &b, data), qt.IsNil)
got := b.String()
c.Assert(got, qt.Contains, "foo")
c.Assert(got, qt.Contains, "hello hugo")
c.Assert(got, qt.Contains, "Map: av")
}