1 files changed, 47 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/inconsistent_digit_grouping.rs b/src/tools/clippy/tests/ui/inconsistent_digit_grouping.rs
new file mode 100644
index 000000000..d5d27c853
--- /dev/null
+++ b/src/tools/clippy/tests/ui/inconsistent_digit_grouping.rs
@@ -0,0 +1,47 @@
+// run-rustfix
+#[warn(clippy::inconsistent_digit_grouping)]
+#[deny(clippy::unreadable_literal)]
+#[allow(unused_variables, clippy::excessive_precision)]
+fn main() {
+    macro_rules! mac1 {
+        () => {
+            1_23_456
+        };
+    }
+    macro_rules! mac2 {
+        () => {
+            1_234.5678_f32
+        };
+    }
+
+    let good = (
+        123,
+        1_234,
+        1_2345_6789,
+        123_f32,
+        1_234.12_f32,
+        1_234.123_4_f32,
+        1.123_456_7_f32,
+    );
+    let bad = (1_23_456, 1_234_5678, 1234_567, 1_234.5678_f32, 1.234_5678_f32);
+
+    // Test padding
+    let _ = 0x100000;
+    let _ = 0x1000000;
+    let _ = 0x10000000;
+    let _ = 0x100000000_u64;
+
+    // Test suggestion when fraction has no digits
+    let _: f32 = 1_23_456.;
+
+    // Test UUID formatted literal
+    let _: u128 = 0x12345678_1234_1234_1234_123456789012;
+
+    // Ignore literals in macros
+    let _ = mac1!();
+    let _ = mac2!();
+
+    // Issue #6096
+    // Allow separating exponent with '_'
+    let _ = 1.025_011_10_E0;
+}