fix: Prevent jsonpath from causing panic when body is expected to be array but isn't (#392)

* fix: Prevent jsonpath from causing panic when body is expected to be array but isn't

Fixes #391

core/condition_test.go

@@ -231,6 +231,13 @@ func TestCondition_evaluate(t *testing.T) {
 			ExpectedSuccess: true,
 			ExpectedOutput:  "[BODY][0].id == 1",
 		},
+		{
+			Name:            "body-jsonpath-when-body-is-array-but-actual-body-is-not",
+			Condition:       Condition("[BODY][0].name == test"),
+			Result:          &Result{body: []byte("{\"statusCode\": 500, \"message\": \"Internal Server Error\"}")},
+			ExpectedSuccess: false,
+			ExpectedOutput:  "[BODY][0].name (INVALID) == test",
+		},
 		{
 			Name:            "body-jsonpath-complex-int",
 			Condition:       Condition("[BODY].data.id == 1"),