test: refactor bound tests

test/UtilsLibTest.sol

@@ -8,13 +8,21 @@ import "../lib/forge-std/src/Test.sol";
 contract UtilsTest is Test {
     using UtilsLib for int256;
 
-    function testBound(int256 x, int256 low, int256 high) public {
-        if (x <= high) {
-            if (x >= low) assertEq(x.bound(low, high), x);
-            else assertEq(x.bound(low, high), low);
-        } else {
-            if (low <= high) assertEq(x.bound(low, high), high);
-            else assertEq(x.bound(low, high), low);
-        }
+    function testBoundExpected(int256 x, int256 low, int256 high) public {
+        int256 expected = x <= high ? (x >= low ? x : low) : (low <= high ? high : low);
+        assertEq(x.bound(low, high), expected);
+    }
+
+    function testBoundMaxMin(int256 x, int256 low, int256 high) public {
+        int256 maxMin = _max(_min(x, high), low);
+        assertEq(x.bound(low, high), maxMin);
+    }
+
+    function _min(int256 a, int256 b) private pure returns (int256) {
+        return a > b ? b : a;
+    }
+
+    function _max(int256 a, int256 b) private pure returns (int256) {
+        return a > b ? a : b;
     }
 }