NET-1123 Repro FN S2183

analyzers/tests/SonarAnalyzer.Test/TestCases/DoNotShiftByZeroOrIntSize.cs

@@ -132,3 +132,47 @@ private void ImproveShiftingBehavior()
         }
     }
 }
+
+// https://sonarsource.atlassian.net/browse/NET-1122
+namespace Enums
+{
+    enum Int8Enum : byte
+    {
+        One = 1,
+        Two = 1 << 1,
+        Three = 1 << 7,
+        Four = unchecked((byte)(1 << 9)), // FN
+        Five = (byte)(1 << 9), // Error [CS0221]
+        Six = unchecked((byte)(Three << 2)), // FN
+        Seven = Three << 2, // Error [CS0031]
+    }
+
+    enum Int16Enum : short
+    {
+        One = 1,
+        Two = 1 << 1,
+        Three = 1 << 13,
+        Four = unchecked((short)(1 << 17)), // FN
+        Five = (short)(1 << 17), // Error [CS0221]
+        Six = unchecked((short)(Three << 2)), // FN
+        Seven = Three << 2, // Error [CS0031]
+    }
+
+    enum Int32Enum : int
+    {
+        One = 1,
+        Two = 1 << 1,
+        Three = 1 << 31,
+        Four = 1 << 33, // FN
+        Five = Three << 2, // FN
+    }
+
+    enum Int64Enum : long
+    {
+        One = 1,
+        Two = 1 << 1,
+        Three = 1 << 63,
+        Four = 1 << 65, // FN
+        Five = Three << 2, // FN
+    }
+}