1 files changed, 91 insertions, 0 deletions
diff --git a/src/tests/insert.rs b/src/tests/insert.rs
new file mode 100644
index 0000000..b18cd17
--- /dev/null
+++ b/src/tests/insert.rs
@@ -0,0 +1,91 @@
+use super::*;
+
+use crate::Flags;
+
+#[test]
+fn cases() {
+    case(
+        TestFlags::empty(),
+        &[
+            (TestFlags::A, 1),
+            (TestFlags::A | TestFlags::B, 1 | 1 << 1),
+            (TestFlags::empty(), 0),
+            (TestFlags::from_bits_retain(1 << 3), 1 << 3),
+        ],
+        TestFlags::insert,
+        TestFlags::set,
+    );
+
+    case(
+        TestFlags::A,
+        &[
+            (TestFlags::A, 1),
+            (TestFlags::empty(), 1),
+            (TestFlags::B, 1 | 1 << 1),
+        ],
+        TestFlags::insert,
+        TestFlags::set,
+    );
+}
+
+#[track_caller]
+fn case<T: Flags + std::fmt::Debug + Copy>(
+    value: T,
+    inputs: &[(T, T::Bits)],
+    mut inherent_insert: impl FnMut(&mut T, T),
+    mut inherent_set: impl FnMut(&mut T, T, bool),
+) where
+    T::Bits: std::fmt::Debug + PartialEq + Copy,
+{
+    for (input, expected) in inputs {
+        assert_eq!(
+            *expected,
+            {
+                let mut value = value;
+                inherent_insert(&mut value, *input);
+                value
+            }
+            .bits(),
+            "{:?}.insert({:?})",
+            value,
+            input
+        );
+        assert_eq!(
+            *expected,
+            {
+                let mut value = value;
+                Flags::insert(&mut value, *input);
+                value
+            }
+            .bits(),
+            "Flags::insert({:?}, {:?})",
+            value,
+            input
+        );
+
+        assert_eq!(
+            *expected,
+            {
+                let mut value = value;
+                inherent_set(&mut value, *input, true);
+                value
+            }
+            .bits(),
+            "{:?}.set({:?}, true)",
+            value,
+            input
+        );
+        assert_eq!(
+            *expected,
+            {
+                let mut value = value;
+                Flags::set(&mut value, *input, true);
+                value
+            }
+            .bits(),
+            "Flags::set({:?}, {:?}, true)",
+            value,
+            input
+        );
+    }
+}