feat: add Go backend

server/internal/logic/sys/portal_test.go

@@ -0,0 +1,32 @@
+package sys
+
+import "testing"
+
+func TestParseCents(t *testing.T) {
+	tests := []struct {
+		value string
+		want  int64
+	}{
+		{"0", 0},
+		{"0.01", 1},
+		{"12.3", 1230},
+		{"999.99", 99999},
+	}
+	for _, item := range tests {
+		got, err := parseCents(item.value)
+		if err != nil {
+			t.Fatalf("parseCents(%q) returned error: %v", item.value, err)
+		}
+		if got != item.want {
+			t.Fatalf("parseCents(%q)=%d, want %d", item.value, got, item.want)
+		}
+	}
+}
+
+func TestParseCentsRejectsInvalidValues(t *testing.T) {
+	for _, value := range []string{"", "-1", "1.001", "abc", "1.2.3"} {
+		if _, err := parseCents(value); err == nil {
+			t.Fatalf("parseCents(%q) should fail", value)
+		}
+	}
+}