101 lines
2.9 KiB
Rust
101 lines
2.9 KiB
Rust
// Copyright 2024 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use crate::{
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description::Description,
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matcher::{Matcher, MatcherBase, MatcherResult},
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};
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/// Matches boolean value `true`.
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pub fn is_true() -> BoolMatcher {
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BoolMatcher { expected: true }
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}
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/// Matches boolean value `false`.
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pub fn is_false() -> BoolMatcher {
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BoolMatcher { expected: false }
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}
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/// Matches a bool value or bool reference.
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#[derive(MatcherBase)]
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pub struct BoolMatcher {
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expected: bool,
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}
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impl BoolMatcher {
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fn matches(&self, actual: bool) -> MatcherResult {
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(actual == self.expected).into()
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}
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fn describe(&self, matcher_result: MatcherResult) -> Description {
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match (matcher_result, self.expected) {
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(MatcherResult::Match, true) | (MatcherResult::NoMatch, false) => "is true".into(),
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(MatcherResult::Match, false) | (MatcherResult::NoMatch, true) => "is false".into(),
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}
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}
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}
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impl Matcher<bool> for BoolMatcher {
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fn matches(&self, actual: bool) -> MatcherResult {
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self.matches(actual)
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}
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fn describe(&self, matcher_result: MatcherResult) -> Description {
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self.describe(matcher_result)
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}
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}
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impl<'a> Matcher<&'a bool> for BoolMatcher {
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fn matches(&self, actual: &'a bool) -> MatcherResult {
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self.matches(*actual)
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}
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fn describe(&self, matcher_result: MatcherResult) -> Description {
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self.describe(matcher_result)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::prelude::*;
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use crate::Result;
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#[test]
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fn match_value() -> Result<()> {
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verify_that!(true, is_true())?;
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verify_that!(true, not(is_false()))?;
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verify_that!(false, is_false())?;
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verify_that!(false, not(is_true()))
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}
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#[test]
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fn match_ref() -> Result<()> {
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let t = true;
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let f = false;
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verify_that!(&t, is_true())?;
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verify_that!(&t, not(is_false()))?;
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verify_that!(&f, is_false())?;
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verify_that!(&f, not(is_true()))
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}
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#[test]
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fn describe() {
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assert_eq!(is_true().describe(MatcherResult::Match).to_string(), "is true");
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assert_eq!(is_true().describe(MatcherResult::NoMatch).to_string(), "is false");
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assert_eq!(is_false().describe(MatcherResult::Match).to_string(), "is false");
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assert_eq!(is_false().describe(MatcherResult::NoMatch).to_string(), "is true");
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}
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}
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