implementing function

duck/uncle.go

@@ -1,6 +1,7 @@
 package duck
 
 import (
+	"fmt"
 	"os"
 
 	org "github.com/riquellopes/tiopatinhas/organizze"
@@ -22,3 +23,29 @@ func HowMuchDidISpend() (int, error) {
 	}
 	return total, err
 }
+
+// Uncle -
+type Uncle struct {
+	GoalCents   int
+	MonthBudget int
+}
+
+// Alert -
+func (u *Uncle) Alert() (string, error) {
+	// // os.Getenv("DUCK_GOAL_CENTS")
+	// strconv.Atoi(os.Getenv("DUCK_MONTH_BUDGET_CENTS"))
+	// Goal monthly that I need to have every months.
+	goalByMonth := u.GoalCents / 12
+
+	// Call service to get all spents of current month.
+	spents, err := HowMuchDidISpend()
+	moneyLeft := u.MonthBudget + spents
+
+	if spents == 0 || moneyLeft > goalByMonth {
+		return "You are walking in the right way.", nil
+	}
+	// Calc to get monthly variaction.
+	variaction := 100 - ((moneyLeft * 100) / goalByMonth)
+	// return "You are 10% off your monthly goal!", err
+	return fmt.Sprintf("You are %d%% off your monthly goal!", variaction), err
+}

duck/uncle_test.go

@@ -40,3 +40,80 @@ func Test_should_get_0_when_call_the_func(t *testing.T) {
 
 	assert.Equal(t, money, 0)
 }
+
+func Test_should_get_10_porcent_msg(t *testing.T) {
+	defer gock.Off()
+
+	response := []org.Transaction{
+		// R$ 500,00
+		{ID: 1, AmountCents: -50000},
+		// R$ 500,00
+		{ID: 2, AmountCents: -50000},
+		// R$ 1000,00
+		{ID: 3, AmountCents: -100000},
+		// R$ 2000,00
+		{ID: 4, AmountCents: -200000},
+	}
+
+	gock.New(org.URI).
+		Get("/transactions").
+		Reply(200).
+		JSON(response)
+
+	uncle := Uncle{
+		// R$ 20.000,00
+		GoalCents: 2000000,
+		// R$ 5.000,00
+		MonthBudget: 500000,
+	}
+
+	way, _ := uncle.Alert()
+	assert.Equal(t, way, "You are 40% off your monthly goal!")
+}
+
+func Test_should_get_ok_msg(t *testing.T) {
+	defer gock.Off()
+
+	response := []org.Transaction{}
+
+	gock.New(org.URI).
+		Get("/transactions").
+		Reply(200).
+		JSON(response)
+
+	uncle := Uncle{
+		// R$ 20.000,00
+		GoalCents: 2000000,
+		// R$ 5.000,00
+		MonthBudget: 500000,
+	}
+
+	way, _ := uncle.Alert()
+
+	assert.Equal(t, way, "You are walking in the right way.")
+}
+
+func Test_should_get_ok_msg_when_financial_ok(t *testing.T) {
+	defer gock.Off()
+
+	response := []org.Transaction{
+		// R$ 200,00
+		{ID: 95, Description: "Just a little cafe on mall.", AmountCents: -20000},
+	}
+
+	gock.New(org.URI).
+		Get("/transactions").
+		Reply(200).
+		JSON(response)
+
+	uncle := Uncle{
+		// R$ 20.000,00
+		GoalCents: 2000000,
+		// R$ 5.000,00
+		MonthBudget: 500000,
+	}
+
+	way, _ := uncle.Alert()
+
+	assert.Equal(t, way, "You are walking in the right way.")
+}