flavio 0.5.0

flavio welcomes you
Documentation 
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use super::{TensorError, TensorRank0};
use crate::{get_defeat_message, ABS_TOL, EPSILON, REL_TOL};
use std::{cmp::PartialEq, fmt};

#[cfg(test)]
pub trait ErrorTensor {
    fn error(
        &self,
        comparator: &Self,
        tol_abs: &TensorRank0,
        tol_rel: &TensorRank0,
    ) -> Option<usize>;
    fn error_fd(&self, comparator: &Self, epsilon: &TensorRank0) -> Option<(bool, usize)>;
}

pub fn assert_eq<'a, T: fmt::Display + PartialEq + ErrorTensor>(
    value_1: &'a T,
    value_2: &'a T,
) -> Result<(), TestError> {
    if value_1 == value_2 {
        Ok(())
    } else {
        Err(TestError {
            message: format!(
            "\n\x1b[1;91mAssertion `left == right` failed.\n\x1b[0;91m  left: {}\n right: {}\x1b[0m",
            value_1, value_2
        ),
        })
    }
}

pub fn assert_eq_from_fd<'a, T: fmt::Display + ErrorTensor>(
    value: &'a T,
    value_fd: &'a T,
) -> Result<(), TestError> {
    if let Some((failed, error_count)) = value.error_fd(value_fd, &EPSILON) {
        if failed {
            Err(TestError {
                message: format!(
                "\n\x1b[1;91mAssertion `left ≈= right` failed in {} places.\n\x1b[0;91m  left: {}\n right: {}\x1b[0m",
                error_count, value, value_fd
            ),
            })
        } else {
            println!(
                "Warning: \n\x1b[1;93mAssertion `left ≈= right` was weak in {} places.\x1b[0m",
                error_count
            );
            Ok(())
        }
    } else {
        Ok(())
    }
}

pub fn assert_eq_within_tols<'a, T: fmt::Display + ErrorTensor>(
    value_1: &'a T,
    value_2: &'a T,
) -> Result<(), TestError> {
    if let Some(error_count) = value_1.error(value_2, &ABS_TOL, &REL_TOL) {
        Err(TestError {
            message: format!(
            "\n\x1b[1;91mAssertion `left ≈= right` failed in {} places.\n\x1b[0;91m  left: {}\n right: {}\x1b[0m",
            error_count, value_1, value_2
        ),
        })
    } else {
        Ok(())
    }
}

pub struct TestError {
    pub message: String,
}

impl fmt::Debug for TestError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(
            f,
            "{}\n\x1b[0;2;31m{}\x1b[0m\n",
            self.message,
            get_defeat_message()
        )
    }
}

impl From<TensorError> for TestError {
    fn from(_error: TensorError) -> TestError {
        todo!()
    }
}