go语言设计模式之template

template.go

package template

import (
	"strings"
)

type MessageRetriever interface {
	Message() string
}

type Template interface {
	first() string
	third() string
	ExecuteAlgorithm(MessageRetriever) string
}

type TemplateImpl struct{}

func (t *TemplateImpl) first() string {
	return "hello"
}

func (t *TemplateImpl) third() string {
	return "template"
}

func (t *TemplateImpl) ExecuteAlgorithm(m MessageRetriever) string {
	return strings.Join([]string{t.first(), m.Message(), t.third()}, "")
}

　　

template_test.go

package template

import (
	"strings"
	"testing"
)

type TestStruct struct {
	TemplateImpl
}

func (m *TestStruct) Message() string {
	return "world"
}

func TestTemplate_ExecuteAlgorithm(t *testing.T) {
	t.Run("Using interfaces", func(t *testing.T) {
		s := &TestStruct{}
		res := s.ExecuteAlgorithm(s)
		expected := "world"
		if !strings.Contains(res, expected) {
			t.Errorf("Expected string '%s' was not found on returned string\n", expected)
		}
	})
}

　

输出：

C:/Go/bin/go.exe test -v [D:/Go/src/github.com/aguncn/go-design-patterns/Behavioral/Teamplate]
=== RUN   TestTemplate_ExecuteAlgorithm
=== RUN   TestTemplate_ExecuteAlgorithm/Using_interfaces
--- PASS: TestTemplate_ExecuteAlgorithm (0.00s)
    --- PASS: TestTemplate_ExecuteAlgorithm/Using_interfaces (0.00s)
PASS
ok  	Teamplate	0.033s
成功: 进程退出代码 0.