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use self::fluid::core::prelude::*;
use crate as fluid;
use std::ops::Not;
#[derive(Debug, Drop)]
pub struct BeAnError<O: Debug, E: Debug> {
pub(in crate::assertions) should: ShouldImpl<Result<O, E>>,
pub(in crate::assertions) containing_truthness: bool,
}
impl<O: Debug, E: Debug> AssertionImpl for BeAnError<O, E> {
type Left = Result<O, E>;
fn failure_message(&mut self) -> Option<String> {
let left_dbg = self.should.left_dbg();
let truthness = self.should.truthness();
if self.should.left.as_ref()?.is_err() != self.should.truthness {
let message = if let Some(stringified) = self.should.stringified() {
format!(
"\t{} is {}\n\
\tbut it should{} be an error.",
stringified,
left_dbg,
truthness.str()
)
} else {
format!("\t{} is{} an error.", left_dbg, truthness.not().str())
};
Some(message)
} else {
None
}
}
fn consume_as_should(mut self) -> ShouldImpl<Self::Left> {
self.should.take()
}
fn should_mut(&mut self) -> &mut ShouldImpl<Self::Left> {
&mut self.should
}
}
impl<O: Debug, E: Debug> Should<Result<O, E>> {
pub fn be_an_error(self) -> ChainableAssert<BeAnError<O, E>> {
let implem = BeAnError {
should: self.into(),
containing_truthness: true,
};
ChainableAssert(implem)
}
}