public async Task Async_nullの場合は例外が発生する()
{
Func<Task> act = () => ResultExtensions.ContainsError(
source: null as Task<Result<string>>,
new Error());
await act.Should().ThrowAsync<ArgumentNullException>();
}
public async Task Async_Eq_nullの場合は例外が発生する()
{
Func <Task> act = () =>
ResultExtensions.ContainsError(
source: null as Task <Result>,
new Error(),
EqualityComparer <IError> .Default);
await act.Should().ThrowAsync <ArgumentNullException>();
}