1 files changed, 64 insertions, 0 deletions
diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..023c545
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,64 @@
+// Copyright (c) 2018 The predicates-rs Project Developers.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::fmt;
+
+use crate::reflection;
+use crate::Predicate;
+
+#[derive(Clone, PartialEq, Eq)]
+pub(crate) struct DebugAdapter<T>
+where
+    T: fmt::Debug,
+{
+    pub(crate) debug: T,
+}
+
+impl<T> DebugAdapter<T>
+where
+    T: fmt::Debug,
+{
+    pub fn new(debug: T) -> Self {
+        Self { debug }
+    }
+}
+
+impl<T> fmt::Display for DebugAdapter<T>
+where
+    T: fmt::Debug,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:#?}", self.debug)
+    }
+}
+
+impl<T> fmt::Debug for DebugAdapter<T>
+where
+    T: fmt::Debug,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.debug.fmt(f)
+    }
+}
+
+pub(crate) fn default_find_case<'a, P, Item>(
+    pred: &'a P,
+    expected: bool,
+    variable: &Item,
+) -> Option<reflection::Case<'a>>
+where
+    P: Predicate<Item>,
+    Item: ?Sized,
+{
+    let actual = pred.eval(variable);
+    if expected == actual {
+        Some(reflection::Case::new(Some(pred), actual))
+    } else {
+        None
+    }
+}