promisif-node

promise flow with if cycle

Usage

const Pif = require('promisif-node')()
let i = 0
new Pif((resolve) => resolve())
    .then(() => {
        Pif.if(false);
        return 'test';
    })
    .then(()=>i++)
    .catch(()=>i++)
    .then(() => Pif.end())
    .then((val) => {
        assert(val === 'test');
        assert(i === 0);
    });
let i = 0
Pif.reject()
    .catch(() => {
        Pif.if(false);
        return 'test';
    })
    .then(()=>i++)
    .then(()=>i++)
    .catch(() => Pif.end())
    .then((val) => {
        assert(val === 'test');
        assert(i === 0);
    });
let i = 0
Pif.reject()
    .catch(() => {
        Pif.if(false);
        return 'test';
    })
    .then(()=>i++)
    .then(()=>i++)
    .then(() => Pif.end())
    .then((val) => {
        assert(val === 'test');
        assert(i === 0);
    });
let i = 0
Pif.resolve()
    .then(() => {
        Pif.if(false);
        return 'test';
    })
    .then(()=>i++)
    .then(()=>i++)
    .catch(() => Pif.end())
    .then((val) => {
        assert(val === 'test');
        assert(i === 0);
    });

new Pif((resolve) => resolve())
    .then(() => {
        Pif.if(false);
        return Promise.reject('error');
    })
    .catch(()=>i++)
    .catch(()=>i++)
    .then(()=>i++)
    .then(() => Pif.end())
    .catch((error) => {
        assert(error === 'error');
        assert(i === 0);
    });

Pif.reject()
    .catch(() => {
        Pif.if(false);
        return Promise.reject('error');
    })
    .catch(()=>i++)
    .catch(()=>i++)
    .then(()=>i++)
    .catch(() => Pif.end())
    .catch((error) => {
        assert(error === 'error');
        assert(i === 0);
    });

new Pif((resolve) => resolve())
    .then(() => {
        Pif.if(false);
        return Promise.reject('error');
    })
    .catch(()=>i++)
    .catch(()=>i++)
    .then(()=>i++)
    .catch(() => Pif.end())
    .catch((error) => {
        assert(error === 'error');
        assert(i === 0);
    });

new Pif((resolve) => resolve())
    .catch(() => {
        Pif.if(false);
        return Promise.reject('error');
    })
    .catch(()=>i++)
    .catch(()=>i++)
    .then(()=>i++)
    .then(() => Pif.end())
    .catch((error) => {
        assert(error === 'error');
        assert(i === 0);
    });

    new Pif((resolve) => resolve())
    .catch(() => {
        Pif.if(true);
        return Promise.reject('error');
    })
    .catch(()=>i++)
    .then(()=>i++)
    .then(()=>i++)
    .then(() => Pif.end())
    .catch((error) => {
        assert(error === 'error');
        assert(i === 3);
    });

API

Class Method

resolve(val)

return a resolved if-promise.

reject(val)

return a rejected if-promise.

if(bool)

init the conditional block if bool is true.

end()

finish the conditional block. You can called in any time, could be a then method or catch method.

Instance Method

then(res,rej) -> if-promise

wrapper to then promise method.

catch(rej) -> if-promise

wrapper to catch promise method.