136 lines
2.4 KiB
Go
136 lines
2.4 KiB
Go
package service
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import (
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"context"
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"errors"
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"testing"
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)
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type fakeCardToIBANClient struct {
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iban string
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err error
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called bool
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receivedCard string
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receivedContext context.Context
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}
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func (f *fakeCardToIBANClient) Convert(
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ctx context.Context,
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cardNumber string,
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) (string, error) {
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f.called = true
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f.receivedCard = cardNumber
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f.receivedContext = ctx
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return f.iban, f.err
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}
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func TestCardServiceConvertCardToIBANSuccess(t *testing.T) {
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client := &fakeCardToIBANClient{
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iban: "IR123456789012345678901234",
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}
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service := NewCardService(client)
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cardNumber := "6037991234567890"
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iban, err := service.ConvertCardToIBAN(
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context.Background(),
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cardNumber,
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)
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if err != nil {
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t.Fatalf("ConvertCardToIBAN() unexpected error: %v", err)
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}
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if iban != client.iban {
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t.Errorf(
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"ConvertCardToIBAN() iban = %q, want %q",
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iban,
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client.iban,
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)
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}
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if !client.called {
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t.Error("expected client to be called")
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}
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if client.receivedCard != cardNumber {
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t.Errorf(
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"client received card = %q, want %q",
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client.receivedCard,
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cardNumber,
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)
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}
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}
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func TestCardServiceRejectsInvalidCardBeforeClientCall(t *testing.T) {
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client := &fakeCardToIBANClient{}
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service := NewCardService(client)
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_, err := service.ConvertCardToIBAN(
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context.Background(),
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"123",
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)
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if err == nil {
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t.Fatal("expected validation error")
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}
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if client.called {
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t.Error("client should not be called for an invalid card")
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}
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}
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func TestCardServiceReturnsClientError(t *testing.T) {
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clientErr := errors.New("upstream unavailable")
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client := &fakeCardToIBANClient{
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err: clientErr,
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}
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service := NewCardService(client)
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_, err := service.ConvertCardToIBAN(
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context.Background(),
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"6037991234567890",
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)
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if err == nil {
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t.Fatal("expected client error")
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}
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if !errors.Is(err, clientErr) {
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t.Errorf(
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"ConvertCardToIBAN() error = %v, want wrapped %v",
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err,
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clientErr,
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)
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}
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}
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func TestCardServicePassesContextToClient(t *testing.T) {
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client := &fakeCardToIBANClient{
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iban: "IR123456789012345678901234",
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}
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service := NewCardService(client)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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_, err := service.ConvertCardToIBAN(
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ctx,
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"6037991234567890",
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)
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if err != nil {
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t.Fatalf("ConvertCardToIBAN() unexpected error: %v", err)
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}
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if client.receivedContext != ctx {
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t.Error("service did not pass the request context to the client")
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}
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}
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