Hi James, I hope you are well.
Today I had a problem testing flow + react with Jest. I was trying to test an invalid input in component's Props (In that case, I was testing a component with "color" props as a number, which should call "console.error" with something), although I used this props in the render function like "this.props.color.replace(...)". My code threw an exception about color don't have a replace function and don't even check type before.
I tried to use flow-runtime in babel without success. Do you suggest anything?