So I'm trying to go with a mockist approach of testing this convert function in a temperature converter class. But I can't quite figure out how to properly test it without also testing the functions of the cases.
While I COULD just call the function and set the expected result to be the converted temperature, that wouldn't be a true unit test with the approach I'm trying to take.
I want to test the switch, not the functions in the cases.
How would I go about doing that using Jest?
convert(toScale: string) {
switch (`${this.#system} to ${toScale}`) {
case "C to F":
return this.celsiusToFahrenheit(this.#value);
case "C to K":
return this.celsiusToKelvin(this.#value);
case "F to C":
return this.fahrenheitToCelsius(this.#value);
case "F to K":
return this.fahrenheitToKelvin(this.#value);
case "K to C":
return this.kelvinToCelsius(this.#value);
case "K to F":
return this.kelvinToFahrenheit(this.#value);
default:
break;
}
}