feat(stats): show work and time-off lengths (#66)

src/app/services/leave-planner.worker.spec.ts

@@ -197,6 +197,13 @@ parentPort.on('message', (data) => globalThis.self.onmessage({ data }));
 						: undefined;
 			if (!plan) throw new Error('Expected a valid earned-chain plan.');
 			expect(plan.calculationDate).toBe('2024-05-01');
+			expect(plan.metrics).toMatchObject({
+				nonWorkingDayGain: 5,
+				averageWorkSequence: 1,
+				longestWorkSequence: 1,
+				averageTimeOffPeriod: 4.5,
+				longestTimeOffPeriod: 5,
+			});
 			expect(plan.placements).toMatchObject([
 				{
 					date: '2024-05-03',
@@ -250,6 +257,7 @@ parentPort.on('message', (data) => globalThis.self.onmessage({ data }));
 				throw new Error(`Expected the same direct plan: ${JSON.stringify(direct)}`);
 			expect(plan.placements).toEqual(direct.placements);
 			expect(plan.ifThenContributions).toEqual(direct.ifThenContributions);
+			expect(plan.metrics).toEqual(direct.metrics);
 			const root: HTMLElement = fixture.nativeElement;
 			expect(root.textContent).toContain('Droit futur généré');
 			expect(root.textContent).toContain('CP autour du férié');