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//! Ordering matchers for comparable values.
use core::fmt::Debug;
use crate::error::MatchError;
use crate::expectation::Expectation;
#[allow(clippy::needless_pass_by_value)]
impl<T: PartialOrd + Debug> Expectation<T> {
/// Asserts the value is strictly greater than the given bound.
///
/// Use [`to_be_at_least`](Self::to_be_at_least) for `>=`.
///
/// # Errors
///
/// Returns [`MatchError`] if the value is less than or equal to the bound.
///
/// ```text
/// expect!(count)
/// actual: 3
/// expected: to be greater than 5
/// ```
///
/// # Examples
///
/// ```
/// use behave::Expectation;
///
/// let result = Expectation::new(10, "10").to_be_greater_than(5);
/// assert!(result.is_ok());
/// ```
pub fn to_be_greater_than(&self, bound: T) -> Result<(), MatchError> {
let is_match = *self.value() > bound;
self.check(is_match, format!("to be greater than {bound:?}"))
}
/// Asserts the value is less than the given bound.
///
/// # Errors
///
/// Returns [`MatchError`] if the comparison fails.
///
/// # Examples
///
/// ```
/// use behave::Expectation;
///
/// let result = Expectation::new(3, "3").to_be_less_than(5);
/// assert!(result.is_ok());
/// ```
pub fn to_be_less_than(&self, bound: T) -> Result<(), MatchError> {
let is_match = *self.value() < bound;
self.check(is_match, format!("to be less than {bound:?}"))
}
/// Asserts the value is greater than or equal to the given bound.
///
/// # Errors
///
/// Returns [`MatchError`] if the comparison fails.
///
/// # Examples
///
/// ```
/// use behave::Expectation;
///
/// let result = Expectation::new(5, "5").to_be_at_least(5);
/// assert!(result.is_ok());
/// ```
pub fn to_be_at_least(&self, bound: T) -> Result<(), MatchError> {
let is_match = *self.value() >= bound;
self.check(is_match, format!("to be at least {bound:?}"))
}
/// Asserts the value is less than or equal to the given bound.
///
/// # Errors
///
/// Returns [`MatchError`] if the comparison fails.
///
/// # Examples
///
/// ```
/// use behave::Expectation;
///
/// let result = Expectation::new(5, "5").to_be_at_most(5);
/// assert!(result.is_ok());
/// ```
pub fn to_be_at_most(&self, bound: T) -> Result<(), MatchError> {
let is_match = *self.value() <= bound;
self.check(is_match, format!("to be at most {bound:?}"))
}
/// Asserts the value falls within the inclusive range `[low, high]`.
///
/// Both bounds are inclusive: `low <= value <= high`.
///
/// # Errors
///
/// Returns [`MatchError`] if the value is outside the range.
///
/// ```text
/// expect!(score)
/// actual: 150
/// expected: to be between 0 and 100
/// ```
///
/// # Examples
///
/// ```
/// use behave::Expectation;
///
/// let result = Expectation::new(5, "5").to_be_between(1, 10);
/// assert!(result.is_ok());
/// ```
pub fn to_be_between(&self, low: T, high: T) -> Result<(), MatchError> {
let val = self.value();
let is_match = *val >= low && *val <= high;
self.check(is_match, format!("to be between {low:?} and {high:?}"))
}
}
#[cfg(test)]
mod tests {
use crate::Expectation;
#[test]
fn greater_than_pass() {
assert!(Expectation::new(10, "x").to_be_greater_than(5).is_ok());
}
#[test]
fn greater_than_fail_equal() {
assert!(Expectation::new(5, "x").to_be_greater_than(5).is_err());
}
#[test]
fn greater_than_fail_less() {
assert!(Expectation::new(3, "x").to_be_greater_than(5).is_err());
}
#[test]
fn greater_than_negated() {
assert!(Expectation::new(3, "x")
.negate()
.to_be_greater_than(5)
.is_ok());
}
#[test]
fn less_than_pass() {
assert!(Expectation::new(3, "x").to_be_less_than(5).is_ok());
}
#[test]
fn less_than_fail_equal() {
assert!(Expectation::new(5, "x").to_be_less_than(5).is_err());
}
#[test]
fn less_than_fail_greater() {
assert!(Expectation::new(10, "x").to_be_less_than(5).is_err());
}
#[test]
fn less_than_negated() {
assert!(Expectation::new(10, "x")
.negate()
.to_be_less_than(5)
.is_ok());
}
#[test]
fn at_least_pass_greater() {
assert!(Expectation::new(10, "x").to_be_at_least(5).is_ok());
}
#[test]
fn at_least_pass_equal() {
assert!(Expectation::new(5, "x").to_be_at_least(5).is_ok());
}
#[test]
fn at_least_fail() {
assert!(Expectation::new(3, "x").to_be_at_least(5).is_err());
}
#[test]
fn at_least_negated() {
assert!(Expectation::new(3, "x").negate().to_be_at_least(5).is_ok());
}
#[test]
fn at_most_pass_less() {
assert!(Expectation::new(3, "x").to_be_at_most(5).is_ok());
}
#[test]
fn at_most_pass_equal() {
assert!(Expectation::new(5, "x").to_be_at_most(5).is_ok());
}
#[test]
fn at_most_fail() {
assert!(Expectation::new(10, "x").to_be_at_most(5).is_err());
}
#[test]
fn at_most_negated() {
assert!(Expectation::new(10, "x").negate().to_be_at_most(5).is_ok());
}
// --- to_be_between ---
#[test]
fn between_pass_in_range() {
assert!(Expectation::new(5, "x").to_be_between(1, 10).is_ok());
}
#[test]
fn between_pass_low_boundary() {
assert!(Expectation::new(1, "x").to_be_between(1, 10).is_ok());
}
#[test]
fn between_pass_high_boundary() {
assert!(Expectation::new(10, "x").to_be_between(1, 10).is_ok());
}
#[test]
fn between_fail_below() {
assert!(Expectation::new(0, "x").to_be_between(1, 10).is_err());
}
#[test]
fn between_fail_above() {
assert!(Expectation::new(11, "x").to_be_between(1, 10).is_err());
}
#[test]
fn between_negated() {
assert!(Expectation::new(0, "x")
.negate()
.to_be_between(1, 10)
.is_ok());
}
}