1 files changed, 32 insertions, 0 deletions
diff --git a/third_party/rust/bitflags/src/tests/is_all.rs b/third_party/rust/bitflags/src/tests/is_all.rs
new file mode 100644
index 0000000000..382a458f61
--- /dev/null
+++ b/third_party/rust/bitflags/src/tests/is_all.rs
@@ -0,0 +1,32 @@
+use super::*;
+
+use crate::Flags;
+
+#[test]
+fn cases() {
+    case(false, TestFlags::empty(), TestFlags::is_all);
+    case(false, TestFlags::A, TestFlags::is_all);
+
+    case(true, TestFlags::ABC, TestFlags::is_all);
+
+    case(
+        true,
+        TestFlags::ABC | TestFlags::from_bits_retain(1 << 3),
+        TestFlags::is_all,
+    );
+
+    case(true, TestZero::empty(), TestZero::is_all);
+
+    case(true, TestEmpty::empty(), TestEmpty::is_all);
+}
+
+#[track_caller]
+fn case<T: Flags + std::fmt::Debug>(expected: bool, value: T, inherent: impl FnOnce(&T) -> bool) {
+    assert_eq!(expected, inherent(&value), "{:?}.is_all()", value);
+    assert_eq!(
+        expected,
+        Flags::is_all(&value),
+        "Flags::is_all({:?})",
+        value
+    );
+}