Add BoolMatcher that matches bool value and reference.

Author: yaxum62

googletest/src/matchers/bool_matcher.rs

@@ -0,0 +1,88 @@
+// Copyright 2024 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.
+
+use crate::{
+    description::Description,
+    matcher::{Matcher, MatcherBase, MatcherResult},
+};
+
+/// Match a bool value or bool reference.
+#[derive(MatcherBase)]
+pub struct BoolMatcher {
+    expected: bool,
+}
+
+impl BoolMatcher {
+    fn matches(&self, actual: bool) -> MatcherResult {
+        (actual == self.expected).into()
+    }
+
+    fn describe(&self, matcher_result: MatcherResult) -> Description {
+        match (matcher_result, self.expected) {
+            (MatcherResult::Match, true) | (MatcherResult::NoMatch, false) => "is true".into(),
+            (MatcherResult::Match, false) | (MatcherResult::NoMatch, true) => "is false".into(),
+        }
+    }
+}
+
+impl Matcher<bool> for BoolMatcher {
+    fn matches(&self, actual: bool) -> MatcherResult {
+        self.matches(actual)
+    }
+
+    fn describe(&self, matcher_result: MatcherResult) -> Description {
+        self.describe(matcher_result)
+    }
+}
+
+impl<'a> Matcher<&'a bool> for BoolMatcher {
+    fn matches(&self, actual: &'a bool) -> MatcherResult {
+        self.matches(*actual)
+    }
+    fn describe(&self, matcher_result: MatcherResult) -> Description {
+        self.describe(matcher_result)
+    }
+}
+
+pub fn is_true() -> BoolMatcher {
+    BoolMatcher { expected: true }
+}
+
+pub fn is_false() -> BoolMatcher {
+    BoolMatcher { expected: false }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::prelude::*;
+
+    #[test]
+    fn match_value() -> Result<()> {
+        verify_that!(true, is_true())?;
+        verify_that!(true, not(is_false()))?;
+        verify_that!(false, is_false())?;
+        verify_that!(false, not(is_true()))
+    }
+
+    #[test]
+    fn match_ref() -> Result<()> {
+        let t = true;
+        let f = false;
+
+        verify_that!(&t, is_true())?;
+        verify_that!(&t, not(is_false()))?;
+        verify_that!(&f, is_false())?;
+        verify_that!(&f, not(is_true()))
+    }
+}

googletest/src/matchers/mod.rs

@@ -17,6 +17,7 @@
 mod all_matcher;
 mod any_matcher;
 mod anything_matcher;
+mod bool_matcher;
 mod char_count_matcher;
 mod conjunction_matcher;
 mod container_eq_matcher;
@@ -59,6 +60,7 @@ mod tuple_matcher;
 mod unordered_elements_are_matcher;
 
 pub use anything_matcher::anything;
+pub use bool_matcher::{is_false, is_true};
 pub use char_count_matcher::char_count;
 pub use container_eq_matcher::container_eq;
 pub use contains_matcher::{contains, ContainsMatcher};