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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// There are no visible documentation elements in this module.
#![doc(hidden)]
use crate::matcher::{Matcher, MatcherResult};
use std::fmt::Debug;
/// Matcher created by [`Matcher::or`].
///
/// **For internal use only. API stablility is not guaranteed!**
#[doc(hidden)]
pub struct DisjunctionMatcher<M1, M2> {
m1: M1,
m2: M2,
}
impl<M1, M2> DisjunctionMatcher<M1, M2> {
pub(crate) fn new(m1: M1, m2: M2) -> Self {
Self { m1, m2 }
}
}
impl<M1: Matcher, M2: Matcher<ActualT = M1::ActualT>> Matcher for DisjunctionMatcher<M1, M2>
where
M1::ActualT: Debug,
{
type ActualT = M1::ActualT;
fn matches(&self, actual: &M1::ActualT) -> MatcherResult {
match (self.m1.matches(actual), self.m2.matches(actual)) {
(MatcherResult::NoMatch, MatcherResult::NoMatch) => MatcherResult::NoMatch,
_ => MatcherResult::Match,
}
}
fn explain_match(&self, actual: &M1::ActualT) -> String {
format!("{} and\n {}", self.m1.explain_match(actual), self.m2.explain_match(actual))
}
fn describe(&self, matcher_result: MatcherResult) -> String {
format!("{}, or {}", self.m1.describe(matcher_result), self.m2.describe(matcher_result))
}
}
#[cfg(test)]
mod tests {
use crate::prelude::*;
use indoc::indoc;
#[test]
fn or_true_true_matches() -> Result<()> {
verify_that!(1, anything().or(anything()))
}
#[test]
fn or_true_false_matches() -> Result<()> {
verify_that!(1, anything().or(not(anything())))
}
#[test]
fn or_false_true_matches() -> Result<()> {
verify_that!(1, not(anything()).or(anything()))
}
#[test]
fn or_false_false_does_not_match() -> Result<()> {
let result = verify_that!(1, not(anything()).or(not(anything())));
verify_that!(
result,
err(displays_as(contains_substring(indoc!(
"
Value of: 1
Expected: never matches, or never matches
Actual: 1,
which is anything and
which is anything
"
))))
)
}
#[test]
fn chained_or_matches() -> Result<()> {
verify_that!(10, eq(1).or(eq(5)).or(ge(9)))
}
#[test]
fn works_with_str_slices() -> Result<()> {
verify_that!("A string", ends_with("A").or(ends_with("string")))
}
#[test]
fn works_with_owned_strings() -> Result<()> {
verify_that!("A string".to_string(), ends_with("A").or(ends_with("string")))
}
}
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