front: throw error if no track range found in findTrackSectionOffset utils

Signed-off-by: Clara Ni <clara.ni@outlook.fr>

Author: clarani

front/src/modules/pathfinding/helpers/__tests__/findTrackSectionOffset.spec.ts

@@ -65,7 +65,7 @@ describe('findTrackSectionOffset', () => {
     expect(result).toEqual({ track: 'track_2', offset: 1050 });
   });
 
-  it('should not find the track offset if past cumulative sums', () => {
+  it('should throw an error if the given position on path is beyond the last position of the path', () => {
     const trackRangesLengthCumulativeSums = [1000, 2000, 3000];
     const trackRanges = [
       { track_section: 'track_0' },
@@ -74,13 +74,10 @@ describe('findTrackSectionOffset', () => {
     ] as TrackRange[];
 
     const offsetOnPath = 3001;
-    const result = findTrackSectionOffset(
-      offsetOnPath,
-      trackRangesLengthCumulativeSums,
-      trackRanges
-    );
 
-    expect(result).toEqual(null);
+    expect(() =>
+      findTrackSectionOffset(offsetOnPath, trackRangesLengthCumulativeSums, trackRanges)
+    ).toThrow('No track range found for the given position on path');
   });
 
   it('should correctly find the track offset if it is located on the first track range', () => {

front/src/modules/pathfinding/helpers/findTrackSectionOffset.ts

@@ -13,7 +13,10 @@ const findTrackSectionOffset = (
     (cumulativeSum) => positionOnPath <= cumulativeSum
   );
   const trackRange = trackRangesOnPath[index];
-  if (!trackRange) return null;
+
+  if (!trackRange) {
+    throw new Error('No track range found for the given position on path');
+  }
 
   // compute offset
   const inferiorSum = index > 0 ? tracksLengthCumulativeSums[index - 1] : 0;

front/src/modules/pathfinding/helpers/getPointOnPathCoordinates.ts

@@ -22,9 +22,9 @@ const getPointOnPathCoordinates = (
     trackRanges
   );
 
-  const track = tracks[trackOffset!.track];
+  const track = tracks[trackOffset.track];
 
-  return getPointOnTrackCoordinates(track.geo, mToMm(track.length), trackOffset!.offset);
+  return getPointOnTrackCoordinates(track.geo, mToMm(track.length), trackOffset.offset);
 };
 
 export default getPointOnPathCoordinates;

front/src/modules/powerRestriction/helpers/createPathStep.ts

@@ -29,7 +29,6 @@ const createPathStep = (
     tracksLengthCumulativeSums,
     pathProperties.trackSectionRanges
   );
-  if (!trackOffset) return undefined;
 
   const coordinates = getPointOnPathCoordinates(
     tracksById,
@@ -85,8 +84,6 @@ export const createCutAtPathStep = (
     pathProperties.trackSectionRanges
   );
 
-  if (!trackOffset) return null;
-
   const coordinatesAtCut = getPointOnPathCoordinates(
     tracksById,
     pathProperties.trackSectionRanges,