added trackscan update tests

ref #78

src/models/actions/UpdateTrackScan.ts

@@ -1,4 +1,4 @@
-import { IsBoolean, IsInt, IsOptional, IsPositive } from 'class-validator';
+import { IsBoolean, IsInt, IsOptional } from 'class-validator';
 import { getConnection } from 'typeorm';
 import { RunnerNotFoundError } from '../../errors/RunnerErrors';
 import { ScanStationNotFoundError } from '../../errors/ScanStationErrors';
@@ -22,8 +22,8 @@ export abstract class UpdateTrackScan {
      * This is important to link ran distances to runners.
      */
     @IsInt()
-    @IsPositive()
-    runner: number;
+    @IsOptional()
+    runner?: number;
 
     /**
      * Is the updated scan valid (for fraud reasons).
@@ -46,7 +46,9 @@ export abstract class UpdateTrackScan {
      */
     public async updateScan(scan: TrackScan): Promise<TrackScan> {
         scan.valid = this.valid;
-        scan.runner = await this.getRunner();
+        if (this.runner) {
+            scan.runner = await this.getRunner();
+        }
         if (this.station) {
             scan.station = await this.getStation();
         }