PerryMK

Yet another JS mock library

Are you bored with jest? Try PerryMK to make your life harder.

CURRENT VERSION: 0.1.2

How to install

Install from npm

npm install perrymk

How to use PerryMK

Let me first introduce my old friend, Perry:

class Perry{
    constructor(cloth){
        this.cloth=cloth;
    }
    soundWhenMeet(charactor){
        switch(charactor){
            case "doofenshmirtz":
                return "Perry the Platypus!!"
            case "phineas":
                return "There you are Perry"
            case "ferb":
                return "kakkkk kakkkk"
        }
    }
}

He is cute, right?

Core features

Inspired by Mockito, PerryMK is focus on easy-to-use property.

Stub

Simple stub

let perryWatcher = new Mock(Perry);
perry = perryWatcher.when("soundWhenMeet").thenReturn("Mocking is fun, right?")

Stub with expected arguments using ArgumentMatcher (I said! This is a Mockito-copy-cat..)

perry = perryWatcher.when("soundWhenMeet")
                    .withArgs(eq("phineas"))
                    .thenReturn("Oh there you are Perry!..")
perry = perryWatcher.when("soundWhenMeet")
                    .withArgs(eq("doofenshmirtz"))
                    .thenReturn("Doofenshmirtz Evil Incorporated 🎵")
perry = perryWatcher.when("soundWhenMeet")
                    .withArgs(any("string"))
                    .thenReturn("🎵")

Mock

Simple mock

console.log("Total called times:", perryWatcher.verify("soundWhenMeet").times())

Mock with expected arguments

console.log("Called times when meet Doofenshmirtz:", perryWatcher.verify("soundWhenMeet")
                                                                .withArgs(eq("doofenshmirtz"))
                                                                .times())
console.log("Called times when meet Phineas:", perryWatcher.verify("soundWhenMeet")
                                                            .withArgs(eq("phineas"))
                                                            .times())
console.log("Called times when meet Ferb:", perryWatcher.verify("soundWhenMeet")
                                                        .withArgs(eq("ferb"))
                                                        .times())

Credit

• Mockito