feat: format and add test

client/sets_test.go

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