use fatalf

Author: gsinghsfdc

demo_01/main_test.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"testing"
 )
 
@@ -10,6 +9,6 @@ func TestAdd(t *testing.T) {
 	actual := AddTwoNumbers(2, 4)
 
 	if actual != expected {
-		t.Fatal(fmt.Sprintf("expected %v, got %v", expected, actual))
+		t.Fatalf("expected %v, got %v", expected, actual)
 	}
 }

demo_02/bank.go

@@ -70,6 +70,7 @@ func (ca ChequingAccount) Withdraw(amount int, tm TransactionManger) error {
 	if err != nil {
 		return errors.New("failed to get balance for update")
 	}
+	// not thread safe
 	if amount > balance {
 		return errors.New("amount greated than balance")
 	}

demo_02/bank_test.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"errors"
-	"fmt"
 	"testing"
 )
 
@@ -66,7 +65,7 @@ func TestReadBalance(t *testing.T) {
 	}
 
 	if balance != 100 {
-		t.Fatal(fmt.Sprintf("expected balance 100, got %v", balance))
+		t.Fatalf("expected balance 100, got %v", balance)
 	}
 }
 
@@ -77,7 +76,7 @@ func TestDeposit(t *testing.T) {
 	err := account.Deposit(100, tm)
 
 	if err != nil {
-		t.Fatal(fmt.Sprintf("expected no error on deposit, got %v", err))
+		t.Fatalf("expected no error on deposit, got %v", err)
 	}
 }
 

demo_04/bank_test.go

@@ -39,7 +39,7 @@ func TestReadBalance(t *testing.T) {
 	}
 
 	if balance < 100 {
-		t.Fatal(fmt.Sprintf("expected balance 100, got %v", balance))
+		t.Fatalf("expected balance 100, got %v", balance)
 	}
 }