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backend/internal/translator/common/bytes_test.go

@@ -0,0 +1,56 @@
+package common
+
+import "testing"
+
+func TestJoinRawArray(t *testing.T) {
+	tests := []struct {
+		name  string
+		items [][]byte
+		want  string
+	}{
+		{name: "empty", want: "[]"},
+		{name: "single", items: [][]byte{[]byte(`{"id":1}`)}, want: `[{"id":1}]`},
+		{name: "multiple", items: [][]byte{[]byte(`{"id":1}`), []byte(`{"id":2}`)}, want: `[{"id":1},{"id":2}]`},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			if got := string(JoinRawArray(test.items)); got != test.want {
+				t.Fatalf("JoinRawArray() = %s, want %s", got, test.want)
+			}
+		})
+	}
+}
+
+func TestNewRawArrayItems(t *testing.T) {
+	if items := NewRawArrayItems(0); items != nil {
+		t.Fatalf("NewRawArrayItems(0) = %#v, want nil", items)
+	}
+	if items := NewRawArrayItems(3); len(items) != 0 || cap(items) != 3 {
+		t.Fatalf("NewRawArrayItems(3) len = %d, cap = %d; want len 0, cap 3", len(items), cap(items))
+	}
+}
+
+func TestSetRawArrayItems(t *testing.T) {
+	tests := []struct {
+		name  string
+		data  string
+		path  string
+		items [][]byte
+		want  string
+	}{
+		{name: "empty", data: `{"items":[]}`, path: "items", want: `{"items":[]}`},
+		{name: "single nested", data: `{"before":1,"request":{"contents":[]},"after":2}`, path: "request.contents", items: [][]byte{[]byte(`{"id":1}`)}, want: `{"before":1,"request":{"contents":[{"id":1}]},"after":2}`},
+		{name: "single fallback", data: `{"items":[{"old":1},{"old":2}]}`, path: "items", items: [][]byte{[]byte(`{"id":1}`)}, want: `{"items":[{"id":1}]}`},
+		{name: "multiple", data: `{"items":[]}`, path: "items", items: [][]byte{[]byte(`{"id":1}`), []byte(`{"id":2}`)}, want: `{"items":[{"id":1},{"id":2}]}`},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got := SetRawArrayItems([]byte(test.data), test.path, test.items)
+			if string(got) != test.want {
+				t.Fatalf("SetRawArrayItems() = %s, want %s", got, test.want)
+			}
+		})
+	}
+}