Created VisitsExporter test

src/visits/services/VisitsExporter.ts

@@ -1,5 +1,4 @@
 import { CsvJson } from 'csvjson';
-import { head, keys } from 'ramda';
 import { NormalizedVisit } from '../types';
 import { saveCsv } from '../../utils/helpers/csv';
 
@@ -10,15 +9,15 @@ export class VisitsExporter {
   ) {}
 
   public readonly exportVisits = (filename: string, visits: NormalizedVisit[]) => {
-    try {
-      const csv = this.csvjson.toCSV(visits, {
-        headers: keys(head(visits)).join(','),
-      });
-
-      saveCsv(this.window, csv, filename);
-    } catch (e) {
-      // FIXME Handle error
-      console.error(e);
+    if (!visits.length) {
+      return;
     }
+
+    const [ firstVisit ] = visits;
+    const csv = this.csvjson.toCSV(visits, {
+      headers: Object.keys(firstVisit).join(','),
+    });
+
+    saveCsv(this.window, csv, filename);
   };
 }