build(rust): vendor googletest crate

third_party/crates/googletest-0.14.3/src/matchers/bool_matcher.rs

@@ -0,0 +1,100 @@
+// 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},
+};
+
+/// Matches boolean value `true`.
+pub fn is_true() -> BoolMatcher {
+    BoolMatcher { expected: true }
+}
+
+/// Matches boolean value `false`.
+pub fn is_false() -> BoolMatcher {
+    BoolMatcher { expected: false }
+}
+
+/// Matches 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)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::prelude::*;
+    use crate::Result;
+
+    #[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()))
+    }
+
+    #[test]
+    fn describe() {
+        assert_eq!(is_true().describe(MatcherResult::Match).to_string(), "is true");
+        assert_eq!(is_true().describe(MatcherResult::NoMatch).to_string(), "is false");
+        assert_eq!(is_false().describe(MatcherResult::Match).to_string(), "is false");
+        assert_eq!(is_false().describe(MatcherResult::NoMatch).to_string(), "is true");
+    }
+}