52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
package wallet
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import "testing"
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func TestWallet(t *testing.T) {
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assertBalance := func(t testing.TB, wallet Wallet, want Bitcoin) {
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t.Helper()
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got := wallet.Balance()
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if got != want {
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t.Errorf("got %s want %s", got, want)
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}
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}
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assertNoError := func(t testing.TB, got error) {
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t.Helper()
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if got != nil {
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t.Fatal("got an error but didn't want one")
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}
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}
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assertError := func(t testing.TB, got, want error) {
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t.Helper()
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if got == nil {
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t.Fatal("wanted an error but didn't get one")
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}
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if got != want {
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t.Errorf("got %q, want %q", got, want)
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}
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}
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t.Run("deposit", func(t *testing.T) {
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wallet := Wallet{}
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wallet.Deposit(Bitcoin(10))
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assertBalance(t, wallet, Bitcoin(10))
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})
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t.Run("withdraw with funds", func(t *testing.T) {
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wallet := Wallet{balance: Bitcoin(20)}
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err := wallet.Withdraw(Bitcoin(10))
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assertNoError(t, err)
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assertBalance(t, wallet, Bitcoin(10))
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})
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t.Run("withdraw insufficient funds", func(t *testing.T) {
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startingBalance := Bitcoin(20)
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wallet := Wallet{startingBalance}
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err := wallet.Withdraw(Bitcoin(100))
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assertError(t, err, ErrInsufficientFunds)
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assertBalance(t, wallet, startingBalance)
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})
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}
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