diff --git a/idea/testData/codegen/controlStructures/ifBlock.jet b/idea/testData/codegen/controlStructures/ifBlock.jet
index e69de29bb2d..4905fb2efc6 100644
--- a/idea/testData/codegen/controlStructures/ifBlock.jet
+++ b/idea/testData/codegen/controlStructures/ifBlock.jet
@@ -0,0 +1,10 @@
+import java.util.*
+
+fun concat(l: List<String>): String? {
+    val sb = StringBuilder()
+    for(s in l) {
+        val x = if(l.size() > 1) { "T" } else { "F" };
+        sb.append(x)
+    }
+    return sb.toString()
+}