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package listing
import (
"errors"
"log/slog"
"os"
"slices"
"testing"
)
func TestMain(m *testing.M) {
slog.SetDefault(slog.New(slog.DiscardHandler))
os.Exit(m.Run())
}
func TestGetAll(t *testing.T) {
mock := NewRepositoryMock()
s := New(mock)
listings, err := s.GetAll()
if err != nil {
t.Error(err.Error())
}
if len(listings) != 3 {
t.Errorf("Listings lengths don't match. Have %d, want 3",
len(listings))
}
}
func TestGetAllWithError(t *testing.T) {
mock := &RepositoryMock{err: errors.New("db exploded")}
s := New(mock)
listings, err := s.GetAll()
if err == nil {
t.Error("No error returned from faulty GetAll call")
}
if listings != nil {
t.Error("Listings not nil when returned from faulty GetAll call")
}
}
func TestGetByCategory(t *testing.T) {
mock := NewRepositoryMock()
s := New(mock)
listings, err := s.GetByCategory("audi")
if err != nil {
t.Error(err.Error())
}
if len(listings) != 1 {
t.Errorf("Listings by category have wrong length. Have %d, want %d",
len(listings), 1)
}
if !slices.Contains(listings[0].category, "audi") {
t.Errorf("Returned listing has wrong category. Have %s, want audi",
listings[0].category)
}
}
func TestGetByCategoryNoMatches(t *testing.T) {
mock := &RepositoryMock{}
s := New(mock)
listings, err := s.GetByCategory("nonexistantcategory")
if err != nil {
t.Error(err.Error())
}
if listings != nil {
t.Error("Listings should be nil if no category matches")
}
}
func TestGetByCategoryWithError(t *testing.T) {
mock := &RepositoryMock{err: errors.New("datacenter hit by asteroid")}
s := New(mock)
listings, err := s.GetByCategory("mercedes")
if err == nil {
t.Error("Error nil when GetByCategory failed")
}
if listings != nil {
t.Error("Listings not nil when GetByCategory failed")
}
}
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