github.com/linchen2chris/hugo@v0.0.0-20230307053224-cec209389705/tpl/internal/go_templates/texttemplate/hugo_template_test.go (about)

     1  // Copyright 2022 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  	"context"
    19  	"reflect"
    20  	"strings"
    21  	"testing"
    22  
    23  	qt "github.com/frankban/quicktest"
    24  	"github.com/gohugoio/hugo/common/hreflect"
    25  )
    26  
    27  type TestStruct struct {
    28  	S string
    29  	M map[string]string
    30  }
    31  
    32  func (t TestStruct) Hello1(arg string) string {
    33  	return arg
    34  }
    35  
    36  func (t TestStruct) Hello2(arg1, arg2 string) string {
    37  	return arg1 + " " + arg2
    38  }
    39  
    40  type execHelper struct{}
    41  
    42  func (e *execHelper) Init(ctx context.Context, tmpl Preparer) {
    43  }
    44  
    45  func (e *execHelper) GetFunc(ctx context.Context, tmpl Preparer, name string) (reflect.Value, reflect.Value, bool) {
    46  	if name == "print" {
    47  		return zero, zero, false
    48  	}
    49  	return reflect.ValueOf(func(s string) string {
    50  		return "hello " + s
    51  	}), zero, true
    52  }
    53  
    54  func (e *execHelper) GetMapValue(ctx context.Context, tmpl Preparer, m, key reflect.Value) (reflect.Value, bool) {
    55  	key = reflect.ValueOf(strings.ToLower(key.String()))
    56  	return m.MapIndex(key), true
    57  }
    58  
    59  func (e *execHelper) GetMethod(ctx context.Context, tmpl Preparer, receiver reflect.Value, name string) (method reflect.Value, firstArg reflect.Value) {
    60  	if name != "Hello1" {
    61  		return zero, zero
    62  	}
    63  	m := hreflect.GetMethodByName(receiver, "Hello2")
    64  	return m, reflect.ValueOf("v2")
    65  }
    66  
    67  func TestTemplateExecutor(t *testing.T) {
    68  	c := qt.New(t)
    69  
    70  	templ, err := New("").Parse(`
    71  {{ print "foo" }}
    72  {{ printf "hugo" }}
    73  Map: {{ .M.A }}
    74  Method: {{ .Hello1 "v1" }}
    75  
    76  `)
    77  
    78  	c.Assert(err, qt.IsNil)
    79  
    80  	ex := NewExecuter(&execHelper{})
    81  
    82  	var b bytes.Buffer
    83  	data := TestStruct{S: "sv", M: map[string]string{"a": "av"}}
    84  
    85  	c.Assert(ex.ExecuteWithContext(context.Background(), templ, &b, data), qt.IsNil)
    86  	got := b.String()
    87  
    88  	c.Assert(got, qt.Contains, "foo")
    89  	c.Assert(got, qt.Contains, "hello hugo")
    90  	c.Assert(got, qt.Contains, "Map: av")
    91  	c.Assert(got, qt.Contains, "Method: v2 v1")
    92  }