Add unit tests for middleware, models, services, handlers, and repository helpers

internal/model/savings_test.go

@@ -0,0 +1,61 @@
+package model
+
+import (
+	"database/sql"
+	"testing"
+	"time"
+)
+
+func TestSavingsCategory_ProcessForJSON(t *testing.T) {
+	t.Run("with deposit dates", func(t *testing.T) {
+		c := &SavingsCategory{
+			DepositStartDate: sql.NullTime{Time: time.Date(2025, 1, 1, 0, 0, 0, 0, time.UTC), Valid: true},
+			DepositEndDate:   sql.NullTime{Time: time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC), Valid: true},
+			CreditStartDate:  sql.NullTime{Time: time.Date(2025, 6, 1, 0, 0, 0, 0, time.UTC), Valid: true},
+		}
+		c.ProcessForJSON()
+
+		if c.DepositStartStr == nil || *c.DepositStartStr != "2025-01-01" {
+			t.Errorf("expected 2025-01-01, got %v", c.DepositStartStr)
+		}
+		if c.DepositEndStr == nil || *c.DepositEndStr != "2026-01-01" {
+			t.Errorf("expected 2026-01-01, got %v", c.DepositEndStr)
+		}
+		if c.CreditStartStr == nil || *c.CreditStartStr != "2025-06-01" {
+			t.Errorf("expected 2025-06-01, got %v", c.CreditStartStr)
+		}
+	})
+
+	t.Run("without dates", func(t *testing.T) {
+		c := &SavingsCategory{}
+		c.ProcessForJSON()
+
+		if c.DepositStartStr != nil {
+			t.Error("expected nil deposit_start_date")
+		}
+	})
+}
+
+func TestSavingsRecurringPlan_ProcessForJSON(t *testing.T) {
+	t.Run("with user_id", func(t *testing.T) {
+		p := &SavingsRecurringPlan{
+			UserID: sql.NullInt64{Int64: 42, Valid: true},
+		}
+		p.ProcessForJSON()
+
+		if p.UserIDPtr == nil || *p.UserIDPtr != 42 {
+			t.Errorf("expected 42, got %v", p.UserIDPtr)
+		}
+	})
+
+	t.Run("without user_id", func(t *testing.T) {
+		p := &SavingsRecurringPlan{
+			UserID: sql.NullInt64{Valid: false},
+		}
+		p.ProcessForJSON()
+
+		if p.UserIDPtr != nil {
+			t.Error("expected nil user_id")
+		}
+	})
+}