github.com/gohugoio/hugo@v0.88.1/tpl/internal/go_templates/texttemplate/hugo_template_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 template
    15  
    16  import (
    17  	"bytes"
    18  	"reflect"
    19  	"strings"
    20  	"testing"
    21  
    22  	qt "github.com/frankban/quicktest"
    23  )
    24  
    25  type TestStruct struct {
    26  	S string
    27  	M map[string]string
    28  }
    29  
    30  func (t TestStruct) Hello1(arg string) string {
    31  	return arg
    32  }
    33  
    34  func (t TestStruct) Hello2(arg1, arg2 string) string {
    35  	return arg1 + " " + arg2
    36  }
    37  
    38  type execHelper struct {
    39  }
    40  
    41  func (e *execHelper) GetFunc(tmpl Preparer, name string) (reflect.Value, bool) {
    42  	if name == "print" {
    43  		return zero, false
    44  	}
    45  	return reflect.ValueOf(func(s string) string {
    46  		return "hello " + s
    47  	}), true
    48  }
    49  
    50  func (e *execHelper) GetMapValue(tmpl Preparer, m, key reflect.Value) (reflect.Value, bool) {
    51  	key = reflect.ValueOf(strings.ToLower(key.String()))
    52  	return m.MapIndex(key), true
    53  }
    54  
    55  func (e *execHelper) GetMethod(tmpl Preparer, receiver reflect.Value, name string) (method reflect.Value, firstArg reflect.Value) {
    56  	if name != "Hello1" {
    57  		return zero, zero
    58  	}
    59  	m := receiver.MethodByName("Hello2")
    60  	return m, reflect.ValueOf("v2")
    61  }
    62  
    63  func TestTemplateExecutor(t *testing.T) {
    64  	c := qt.New(t)
    65  
    66  	templ, err := New("").Parse(`
    67  {{ print "foo" }}
    68  {{ printf "hugo" }}
    69  Map: {{ .M.A }}
    70  Method: {{ .Hello1 "v1" }}
    71  
    72  `)
    73  
    74  	c.Assert(err, qt.IsNil)
    75  
    76  	ex := NewExecuter(&execHelper{})
    77  
    78  	var b bytes.Buffer
    79  	data := TestStruct{S: "sv", M: map[string]string{"a": "av"}}
    80  
    81  	c.Assert(ex.Execute(templ, &b, data), qt.IsNil)
    82  	got := b.String()
    83  
    84  	c.Assert(got, qt.Contains, "foo")
    85  	c.Assert(got, qt.Contains, "hello hugo")
    86  	c.Assert(got, qt.Contains, "Map: av")
    87  	c.Assert(got, qt.Contains, "Method: v2 v1")
    88  
    89  }