impast's Introduction

impast

A library for package AST importing.

Installation

go get -u github.com/orisano/impast

How to use

package main

import (
	"fmt"
	"log"
	
	"github.com/orisano/impast"
)

func main() {
	pkg, err := impast.ImportPackage("io")
	if err != nil {
		log.Fatal(err)
	}
	it := impast.FindInterface(pkg, "Writer")
	if it == nil {
		log.Fatalf("io.Writer not found")
	}

	methods := impast.GetRequires(it)
	for _, method := range methods {
		fmt.Println(method.Names[0].Name)
	}
	// Output:
	// Write
}

Useful commands

interfacer

struct to interface command

Installation

go get -u github.com/orisano/impast/cmd/interfacer

How to use

$ interfacer -out HTTPClient net/http.Client
type HTTPClient interface {
	Do(req *http.Request) (*http.Response, error)
	Get(url string) (resp *http.Response, err error)
	Head(url string) (resp *http.Response, err error)
	Post(url, contentType string, body io.Reader) (resp *http.Response, err error)
	PostForm(url string, data url.Values) (resp *http.Response, err error)
}

mocker

generate mock command

Installation

go get -u github.com/orisano/impast/cmd/mocker

How to use

$ mocker -pkg io -type ReadWriter
type ReadWriterMock struct {
	ReadMock	func(p []byte) (n int, err error)
	WriteMock	func(p []byte) (n int, err error)
}

func (m *ReadWriterMock) Read(p []byte) (n int, err error) {
	return m.ReadMock(p)
}

func (m *ReadWriterMock) Write(p []byte) (n int, err error) {
	return m.WriteMock(p)
}

stuber

generate stub command

Installation

go get -u github.com/orisano/impast/cmd/stuber

How to use

$ stuber -pkg net -implement Conn -export -name c -type "*MyConn"
func (c *MyConn) Read(b []byte) (n int, err error) {
	panic("implement me")
}

func (c *MyConn) Write(b []byte) (n int, err error) {
	panic("implement me")
}

func (c *MyConn) Close() error {
	panic("implement me")
}

func (c *MyConn) LocalAddr() net.Addr {
	panic("implement me")
}

func (c *MyConn) RemoteAddr() net.Addr {
	panic("implement me")
}

func (c *MyConn) SetDeadline(t time.Time) error {
	panic("implement me")
}

func (c *MyConn) SetReadDeadline(t time.Time) error {
	panic("implement me")
}

func (c *MyConn) SetWriteDeadline(t time.Time) error {
	panic("implement me")
}