✨ (bitcoin-wallet): add test for basic requirement

Author: yuanyu90221

pointers-and-errors/bitcoin-and-wallet.go

@@ -0,0 +1,10 @@
+package pointers_and_errors
+
+// type Wallet struct {
+// }
+
+// func (w Wallet) Deposit(amount int) {}
+
+// func (w Wallet) Balance() int {
+// 	return 0
+// }

pointers-and-errors/bitcoin-and-wallet_test.go

@@ -0,0 +1,15 @@
+package pointers_and_errors
+
+import "testing"
+
+// Bitcoin Wallet
+func TestWallet(t *testing.T) {
+	wallet := Wallet{}
+
+	wallet.Deposit(10)
+	got := wallet.Balance()
+	want := 10
+	if got != want {
+		t.Errorf("got %d, want %d", got, want)
+	}
+}