restit

RESTit (v1)

A Go micro-framework to help writing RESTful API integration test

Package RESTit provides helps to those who want to write an integration test program for their JSON-based RESTful APIs.

The aim is to make these integration readable highly re-usable, and yet easy to modify.

Migration Notice

This is an old version of RESTit library. This is to keep older projects that depending RESTit from breaking. For new projects, please use the latest version.

If you were using v1 and want to keep using it, please change your import statement from:

import (
    "github.com/yookoala/restit"
)

to:

import (
    restit "github.com/go-restit/restit/v1"
)

Dependencies

RESTit is written in Go (a.k.a. Golang). You’ll have to install go first.

You need to first install “github.com/jmcvetta/napping”:

$ go get github.com/jmcvetta/napping

Install

Just like installing other golang packages:

$ go get github.com/go-restit/restit/v1

How to Use

To use, you first have to implement the TestRespond interface for the REST server response that you’re expecting.

In Go, json contents are usually unmarshaled to structs. What you need to do is implement 4 methods to the struct type.

Example:

type ExmplResp struct {
	Status string  `json:"status"`
	Result []Stuff `json:"result"`
}

func (r *ExmplResp) Count() int {
	return len(r.Result)
}

func (r *ExmplResp) NthValid(n int) (err error) {
	// some test to see nth record is valid
	// such as:
	if r.Result[n].StuffId == 0 {
		return fmt.Errorf("The thing has a StuffId = 0")
	}
	return
}

func (r *ExmplResp) GetNth(n int) (item interface{}, err error) {
	// return the nth item
	return Result[n]
}

func (r *ExmplResp) Match(a interface{}, b interface{}) (match bool, err error) {

	// cast a and b back to Stuff
	real_a = a.(Stuff)
	real_b = b.(Stuff)

	// some test to check if real_a equals real_b
	// ...
}

func (r *ExmplResp) Reset() {
    r.Status = ""
    r.Result = make([]Stuff, 0)
}

Then you may write the tests.

Write Your Tests

You can then test your RESTful API like this:

import (
    restit "github.com/go-restit/restit/v1"
)

// create a tester for your stuffAPI
// first parameter is a human readable name that will
// appear on error second parameter is the base URL to
// the API entry point
stuffAPI := restit.Rest(
    "Stuff", "http://foobar:8080/api/stuffs")

// some parameters we'll use
var result restit.TestResult
var test restit.TestCase
var response ExmplResp

// some random stuff for test
// for example,
stuffToCreate = Stuff{
    Name: "apple",
    Color: "red",
}
stuffToUpdate = Stuff{
    Name: "orange",
    Color: "orange",
}

// here we add some dummy security measures
// or you may add any parameters you like
securityInfo := napping.Params{
    "username": "valid_user",
    "token": "some_security_token",
}


// -------- Test Create --------
// 1. create the stuff
test = stuffAPI.
    Create(&stuffToCreate).
    AddHeader("Authorization", "Some token").
    WithParams(&securityInfo).
    WithResponseAs(&response).
    ExpectResultCount(1).
    ExpectResultsValid().
    ExpectResultNth(0, &stuffToCreate).
    ExpectResultsToPass(
        "Custom Test",
        func (r Response) error {
        // some custom test you may want to run
        // ...
        })

result, err := test.Run()
if err != nil {
    // you may add more verbose output for
    // inspection
    fmt.Printf("Failed creating stuff!!!!\n")
    fmt.Printf("Please inspect the Raw Response: "
            + result.RawText())

    // or you can simply:
    panic(err)
}

// id of the just created stuff
// for reference of later tests
stuffId := response.Result[0].StuffId
stuffToCreate.StuffId = stuffId
stuffToUpdate.StuffId = stuffId

// 2. test the created stuff
test = stuffAPI.
    Retrieve(fmt.Sprintf("%d", stuffId)).
    WithResponseAs(&response).
    ExpectResultCount(1).
    ExpectResultsValid().
    ExpectResultNth(0, &stuffToCreate)
// A short hand to just panic on any error
result = test.RunOrPanic()


// -------- Test Update --------
// 1. update the stuff
result = stuffAPI.
    Update(&stuffToUpdate,
        fmt.Sprintf("%d", stuffId)).
    WithResponseAs(&response).
    WithParams(&securityInfo).
    ExpectResultCount(1).
    ExpectResultsValid().
    ExpectResultNth(0, &stuffToUpdate).
    RunOrPanic() // Yes, you can be this lazy

// 2. test the updated stuff
result = stuffAPI.
    Retrieve(fmt.Sprintf("%d", stuffId)).
    WithResponseAs(&response).
    ExpectResultCount(1).
    ExpectResultsValid().
    ExpectResultNth(0, &stuffToUpdate).
    RunOrPanic()


// -------- Test Delete --------
// delete the stuff
result = stuffAPI.
    Delete(fmt.Sprintf("%d", stuffId)).
    WithResponseAs(&response).
    WithParams(security).
    ExpectResultCount(1).
    ExpectResultsValid().
    ExpectResultNth(0, &stuffToUpdate).
    RunOrPanic()

// 2. test the deleted stuff
result = stuffAPI.
    Retrieve(fmt.Sprintf("%d", stuffId)).
    WithResponseAs(&response).
    ExpectStatus(404).
    RunOrPanic()

Bug Reports

To report issue, please visit the issue tracker.

And of course, patches and pull requests are most welcome.

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