@wmakeev/cloneable-generator
v1.0.1
Published
Cloneable generator from @saga/testing-utils
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cloneable-generator
This code taken from redux-saga testing-utils module. Just
cloneableGenerator
function without any other dependencies.
Install
npm install @wmakeev/cloneable-generator
Example
Takes a generator function (function*) and returns a generator function. All generators instanciated from this function will be cloneable. For testing purpose only.
This is useful when you want to test a different branch of generator function without having to replay the steps that lead to it.
import { cloneableGenerator } from '@wmakeev/cloneable-generator';
function* oddOrEven() {
// some stuff are done here
yield 1;
yield 2;
yield 3;
const userInput = yield 'enter a number';
if (userInput % 2 === 0) {
yield 'even';
} else {
yield 'odd'
}
}
test('my oddOrEven', assert => {
const data = {};
data.gen = cloneableGenerator(oddOrEven)();
assert.equal(
data.gen.next().value,
1,
'it should yield 1'
);
assert.equal(
data.gen.next().value,
2,
'it should yield 2'
);
assert.equal(
data.gen.next().value,
3,
'it should yield 3'
);
assert.equal(
data.gen.next().value,
'enter a number',
'it should ask for a number'
);
assert.test('even number is given', a => {
// we make a clone of the generator before giving the number;
data.clone = data.gen.clone();
a.equal(
data.gen.next(2).value,
'even',
'it should yield "even"'
);
a.equal(
data.gen.next().done,
true,
'it should be done'
);
a.end();
});
assert.test('odd number is given', a => {
a.equal(
data.clone.next(1).value,
'odd',
'it should yield "odd"'
);
a.equal(
data.clone.next().done,
true,
'it should be done'
);
a.end();
});
assert.end();
});