1 files changed, 38 insertions, 0 deletions
diff --git a/vendor/bitflags/src/tests/from_bits_retain.rs b/vendor/bitflags/src/tests/from_bits_retain.rs
new file mode 100644
index 00000000..1ae28a66
--- /dev/null
+++ b/vendor/bitflags/src/tests/from_bits_retain.rs
@@ -0,0 +1,38 @@
+use super::*;
+
+use crate::Flags;
+
+#[test]
+fn cases() {
+    case(0, TestFlags::from_bits_retain);
+    case(1, TestFlags::from_bits_retain);
+    case(1 | 1 << 1 | 1 << 2, TestFlags::from_bits_retain);
+
+    case(1 << 3, TestFlags::from_bits_retain);
+    case(1 | 1 << 3, TestFlags::from_bits_retain);
+
+    case(1 | 1 << 1, TestOverlapping::from_bits_retain);
+
+    case(1 << 1, TestOverlapping::from_bits_retain);
+
+    case(1 << 5, TestExternal::from_bits_retain);
+}
+
+#[track_caller]
+fn case<T: Flags>(input: T::Bits, inherent: impl FnOnce(T::Bits) -> T)
+where
+    <T as Flags>::Bits: std::fmt::Debug + PartialEq,
+{
+    assert_eq!(
+        input,
+        inherent(input).bits(),
+        "T::from_bits_retain({:?})",
+        input
+    );
+    assert_eq!(
+        input,
+        T::from_bits_retain(input).bits(),
+        "Flags::from_bits_retain({:?})",
+        input
+    );
+}