add test

zokrates_core_test/tests/tests/arrays/identity.json

@@ -1,5 +1,5 @@
 {
-	"entry_point": "./tests/tests/arrays/identity.code",
+	"entry_point": "./tests/tests/arrays/identity.zok",
 	"curves": ["Bn128", "Bls12_381", "Bls12_377", "Bw6_761"],
 	"tests": [
 		{

zokrates_core_test/tests/tests/arrays/select.json

@@ -0,0 +1,50 @@
+{
+	"entry_point": "./tests/tests/arrays/select.zok",
+    "max_constraint_count": 44,
+	"curves": ["Bn128", "Bls12_381", "Bls12_377", "Bw6_761"],
+	"tests": [
+		{
+			"input": {
+				"values": ["0", "11", "22", "0"]
+			},
+			"output": {
+				"Ok": {
+					"values": ["0"]
+				}
+			}
+		},
+		{
+			"input": {
+				"values": ["0", "11", "22", "1"]
+			},
+			"output": {
+				"Ok": {
+					"values": ["11"]
+				}
+			}
+		},
+        {
+			"input": {
+				"values": ["0", "11", "22", "2"]
+			},
+			"output": {
+				"Ok": {
+					"values": ["22"]
+				}
+			}
+		},
+		{
+			"input": {
+				"values": ["0", "11", "22", "3"]
+			},
+			"output": {
+				"Err": {
+					"UnsatisfiedConstraint": {
+						"left": "1",
+						"right": "0"
+					}
+				}
+			}
+		}
+	]
+}

zokrates_core_test/tests/tests/arrays/select.zok

@@ -0,0 +1,2 @@
+def main(field[3] array, u32 index) -> field:
+    return array[index]