feat: format and add test

client/cards_test.go

@@ -0,0 +1,28 @@
+package client
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetCardByID(t *testing.T) {
+	tests := []struct {
+		name     string
+		cardID   string
+		wantErr  bool
+		wantCard *Card
+	}{
+		{"valid card", "xy1-1", false, &Card{ID: "xy1-1"}},
+		{"invalid card", "invalid-id", true, nil},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			card, err := GetCardByID(tt.cardID)
+
+			require.ErrorIs(t, err, ErrNotFound)
+			require.Equal(t, tt.wantCard, card, "expected card: %v, got: %v for cardID %v", tt.wantCard, card, tt.cardID)
+		})
+	}
+}