feat: format and add test

client/series_test.go

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