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diff --git a/js/scripting-lang/tests/integration_02_pattern_matching.txt b/js/scripting-lang/tests/integration_02_pattern_matching.txt
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+/* Integration Test: Pattern Matching */
+/* Combines: case expressions, functions, recursion, complex patterns */
+
+..out "=== Integration Test: Pattern Matching ===";
+
+/* Recursive factorial with case expressions */
+factorial : n -> 
+  when n is
+    0 then 1
+    _ then n * (factorial (n - 1));
+
+/* Pattern matching with multiple parameters */
+classify : x y -> 
+  when x y is
+    0 0 then "both zero"
+    0 _ then "x is zero"
+    _ 0 then "y is zero"
+    _ _ then when x is
+            0 then "x is zero (nested)"
+            _ then when y is
+                  0 then "y is zero (nested)"
+                  _ then "neither zero";
+
+/* Test factorial */
+fact5 : factorial 5;
+fact3 : factorial 3;
+
+..assert fact5 = 120;
+..assert fact3 = 6;
+
+/* Test classification */
+test1 : classify 0 0;
+test2 : classify 0 5;
+test3 : classify 5 0;
+test4 : classify 5 5;
+
+..assert test1 = "both zero";
+..assert test2 = "x is zero";
+..assert test3 = "y is zero";
+..assert test4 = "neither zero";
+
+/* Complex nested case expressions */
+analyze : x y z -> 
+  when x y z is
+    0 0 0 then "all zero"
+    0 0 _ then "x and y zero"
+    0 _ 0 then "x and z zero"
+    _ 0 0 then "y and z zero"
+    0 _ _ then "only x zero"
+    _ 0 _ then "only y zero"
+    _ _ 0 then "only z zero"
+    _ _ _ then "none zero";
+
+result1 : analyze 0 0 0;
+result2 : analyze 0 1 1;
+result3 : analyze 1 0 1;
+result4 : analyze 1 1 1;
+
+..assert result1 = "all zero";
+..assert result2 = "only x zero";
+..assert result3 = "only y zero";
+..assert result4 = "none zero";
+
+..out "Pattern matching integration test completed"; 
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