build(rust): vendor googletest crate

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

@@ -0,0 +1,80 @@
+// 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.
+
+use crate::{
+    description::Description,
+    matcher::{Matcher, MatcherBase, MatcherResult},
+};
+use std::fmt::Debug;
+
+/// Matches anything. This matcher always succeeds.
+///
+/// This is useful to check if `actual` matches the specific structure (like
+/// `Some(...)`)  but without caring about the internal value.
+///
+/// ```
+/// # use googletest::prelude::*;
+/// # fn should_pass() -> Result<()> {
+/// let option = Some("Some value");
+/// verify_that!(option, some(anything()))?;
+/// #     Ok(())
+/// # }
+/// # should_pass().unwrap();
+/// ```
+pub fn anything() -> Anything {
+    Anything
+}
+
+#[derive(MatcherBase)]
+pub struct Anything;
+
+impl<T: Debug + Copy> Matcher<T> for Anything {
+    fn matches(&self, _: T) -> MatcherResult {
+        MatcherResult::Match
+    }
+
+    fn describe(&self, matcher_result: MatcherResult) -> Description {
+        match matcher_result {
+            MatcherResult::Match => "is anything".into(),
+            MatcherResult::NoMatch => "never matches".into(),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::prelude::*;
+    use crate::Result;
+
+    #[test]
+    fn anything_matches_i32() -> Result<()> {
+        let value = 32;
+        verify_that!(value, anything())?;
+        Ok(())
+    }
+
+    #[test]
+    fn anything_matches_str() -> Result<()> {
+        let value = "32";
+        verify_that!(value, anything())?;
+        Ok(())
+    }
+
+    #[test]
+    fn anything_matches_option() -> Result<()> {
+        let value = Some(32);
+        verify_that!(value, some(anything()))?;
+        Ok(())
+    }
+}