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//! Equality matchers.
use core::fmt::Debug;
use crate::error::MatchError;
use crate::expectation::Expectation;
impl<T: PartialEq + Debug> Expectation<T> {
/// Asserts the value equals the expected value.
///
/// Uses [`PartialEq`] for comparison. Supports negation via
/// [`.not()`](Expectation::not).
///
/// # Errors
///
/// Returns [`MatchError`] if the values are not equal (or equal when negated).
///
/// ```text
/// expect!(score)
/// actual: 99
/// expected: to equal 42
/// ```
///
/// # Examples
///
/// ```
/// use behave::Expectation;
///
/// let result = Expectation::new(42, "42").to_equal(42);
/// assert!(result.is_ok());
///
/// // Negation:
/// let result = Expectation::new(1, "1").not().to_equal(2);
/// assert!(result.is_ok());
/// ```
#[allow(clippy::needless_pass_by_value)]
pub fn to_equal(&self, expected: T) -> Result<(), MatchError> {
let is_match = *self.value() == expected;
self.check(is_match, format!("to equal {expected:?}"))
}
/// Asserts the value does not equal the given value.
///
/// # Errors
///
/// Returns [`MatchError`] if the values are equal.
///
/// # Examples
///
/// ```
/// use behave::Expectation;
///
/// let result = Expectation::new(1, "1").to_not_equal(2);
/// assert!(result.is_ok());
/// ```
#[allow(clippy::needless_pass_by_value)]
pub fn to_not_equal(&self, expected: T) -> Result<(), MatchError> {
let is_match = *self.value() != expected;
self.check(is_match, format!("to not equal {expected:?}"))
}
}
#[cfg(test)]
mod tests {
use crate::Expectation;
#[test]
fn to_equal_pass() {
let result = Expectation::new(42, "42").to_equal(42);
assert!(result.is_ok());
}
#[test]
fn to_equal_fail() {
let result = Expectation::new(42, "42").to_equal(99);
assert!(result.is_err());
}
#[test]
fn to_equal_negated_pass() {
let result = Expectation::new(42, "42").negate().to_equal(99);
assert!(result.is_ok());
}
#[test]
fn to_equal_negated_fail() {
let result = Expectation::new(42, "42").negate().to_equal(42);
assert!(result.is_err());
}
#[test]
fn to_not_equal_pass() {
let result = Expectation::new(1, "1").to_not_equal(2);
assert!(result.is_ok());
}
#[test]
fn to_not_equal_fail() {
let result = Expectation::new(1, "1").to_not_equal(1);
assert!(result.is_err());
}
#[test]
fn to_not_equal_negated_pass() {
let result = Expectation::new(1, "1").negate().to_not_equal(1);
assert!(result.is_ok());
}
#[test]
fn to_not_equal_negated_fail() {
let result = Expectation::new(1, "1").negate().to_not_equal(2);
assert!(result.is_err());
}
}