stable-function
Ensure a function is stable, meaning the same input always produces the same output
Useful for stress testing functions in your unit tests to make sure their behaviors are consistent.
Install
npm install stable-function
Usage
import stableFunction from 'stable-function';
stableFunction(() => true);
//=> true
let index = 0;
stableFunction.returnValue(100, () => {
if (++index === 10) {
return 'bar';
}
return 'foo';
});
//=> 'bar'
API
stableFunction(count?, testFunction)
Returns a boolean whether the output of testFunction
was stable.
stableFunction.returnValue(count?, testFunction)
Returns the first differing output of testFunction
or the first output if stable.
count
Type: number
Default: 1000
The number of times to call the testFunction
.
testFunction
Type: function
The function to be tested.