Chart builder: discoverable entry points — Build Chart door, dataset picker, no-datasets state

src/app/infrastructure/url-hash.test.ts

@@ -16,6 +16,7 @@ const ALL_VIEWS: ViewState[] = [
   { kind: 'dataset', datasetId: 7 },
   { kind: 'dataset-new' },
   { kind: 'dataset-build', datasetId: 42 },
+  { kind: 'build' },
 ];
 
 describe('serializeHash', () => {
@@ -28,6 +29,7 @@ describe('serializeHash', () => {
     expect(serializeHash({ kind: 'dataset-build', datasetId: 42 })).toBe(
       '#datasets/dataset-42/build',
     );
+    expect(serializeHash({ kind: 'build' })).toBe('#build');
   });
 });
 
@@ -42,6 +44,7 @@ describe('parseHash', () => {
       kind: 'dataset-build',
       datasetId: 42,
     });
+    expect(parseHash('#build')).toEqual({ kind: 'build' });
   });
 
   it('tolerates a missing leading "#"', () => {