initial test

engine/aggregate_test.go

@@ -0,0 +1,88 @@
+package engine
+
+import (
+	"testing"
+)
+
+const input = `
+[
+   {
+      "_id": 1,
+      "name": "karam",
+      "age": 16,
+      "tal": 1.2
+   },
+   {
+      "_id": 2,
+      "name": "bxiry",
+      "age": 16,
+      "tal": 1.25
+   },
+   {
+      "_id": 3,
+      "name": "john",
+      "age": 17,
+      "tal": 1.65
+   },
+   {
+      "_id": 4,
+      "name": "adam",
+      "age": 34,
+      "tal": 1.63
+   },
+   {
+      "_id": 5,
+      "name": "hammam",
+      "age": 33,
+      "tal": 1.65
+   },
+   {
+      "_id": 6,
+      "name": "hisham",
+      "age": 43,
+      "tal": 1.66
+   }
+]`
+
+const sortedStr = `[
+   {
+      "_id": 4,
+      "name": "adam",
+      "age": 34,
+      "tal": 1.63
+   },
+   {
+      "_id": 5,
+      "name": "hammam",
+      "age": 33,
+      "tal": 1.65
+   },
+   {
+      "_id": 6,
+      "name": "hisham",
+      "age": 43,
+      "tal": 1.66
+   },
+   {
+      "_id": 3,
+      "name": "john",
+      "age": 17,
+      "tal": 1.65
+   },
+   {
+      "_id": 1,
+      "name": "karam",
+      "age": 16,
+      "tal": 1.2
+   },
+   {
+      "_id": 1,
+      "name": "karam",
+      "age": 16,
+      "tal": 1.2
+   }
+]`
+
+func TestSortString(t *testing.T) {
+	// Test cases with different data and sort key
+}