1 files changed, 97 insertions, 0 deletions
diff --git a/third_party/rust/bitflags/src/tests/fmt.rs b/third_party/rust/bitflags/src/tests/fmt.rs
new file mode 100644
index 0000000000..ed4571877d
--- /dev/null
+++ b/third_party/rust/bitflags/src/tests/fmt.rs
@@ -0,0 +1,97 @@
+use super::*;
+
+#[test]
+fn cases() {
+    case(TestFlags::empty(), "TestFlags(0x0)", "0", "0", "0", "0");
+    case(TestFlags::A, "TestFlags(A)", "1", "1", "1", "1");
+    case(
+        TestFlags::all(),
+        "TestFlags(A | B | C)",
+        "7",
+        "7",
+        "7",
+        "111",
+    );
+    case(
+        TestFlags::from_bits_retain(1 << 3),
+        "TestFlags(0x8)",
+        "8",
+        "8",
+        "10",
+        "1000",
+    );
+    case(
+        TestFlags::A | TestFlags::from_bits_retain(1 << 3),
+        "TestFlags(A | 0x8)",
+        "9",
+        "9",
+        "11",
+        "1001",
+    );
+
+    case(TestZero::ZERO, "TestZero(0x0)", "0", "0", "0", "0");
+    case(
+        TestZero::ZERO | TestZero::from_bits_retain(1),
+        "TestZero(0x1)",
+        "1",
+        "1",
+        "1",
+        "1",
+    );
+
+    case(TestZeroOne::ONE, "TestZeroOne(ONE)", "1", "1", "1", "1");
+
+    case(
+        TestOverlapping::from_bits_retain(1 << 1),
+        "TestOverlapping(0x2)",
+        "2",
+        "2",
+        "2",
+        "10",
+    );
+
+    case(
+        TestExternal::from_bits_retain(1 | 1 << 1 | 1 << 3),
+        "TestExternal(A | B | 0x8)",
+        "B",
+        "b",
+        "13",
+        "1011",
+    );
+
+    case(
+        TestExternal::all(),
+        "TestExternal(A | B | C | 0xf8)",
+        "FF",
+        "ff",
+        "377",
+        "11111111",
+    );
+
+    case(
+        TestExternalFull::all(),
+        "TestExternalFull(0xff)",
+        "FF",
+        "ff",
+        "377",
+        "11111111",
+    );
+}
+
+#[track_caller]
+fn case<
+    T: std::fmt::Debug + std::fmt::UpperHex + std::fmt::LowerHex + std::fmt::Octal + std::fmt::Binary,
+>(
+    value: T,
+    debug: &str,
+    uhex: &str,
+    lhex: &str,
+    oct: &str,
+    bin: &str,
+) {
+    assert_eq!(debug, format!("{:?}", value));
+    assert_eq!(uhex, format!("{:X}", value));
+    assert_eq!(lhex, format!("{:x}", value));
+    assert_eq!(oct, format!("{:o}", value));
+    assert_eq!(bin, format!("{:b}", value));
+}