Show configured metrics retention (Refs #141)

tests/unit/metrics-refresh.test.ts

@@ -12,6 +12,7 @@ const emptyMatches = {
 };
 const report = (days: number) => ({
     days,
+    metricsKeepDays: 31,
     now: 1000,
     since: 0,
     summary: totals,
@@ -80,6 +81,13 @@ function setup(fetcher: typeof fetch) {
 }
 
 describe('metrics background refresh', () => {
+    it.each([90, 1, 0])('accepts configured retention of %i days', async (metricsKeepDays) => {
+        const value = { ...report(7), metricsKeepDays };
+        const refresh = setup(vi.fn().mockResolvedValue(Response.json(value)));
+        await refresh.refresh();
+        expect(refresh.onData).toHaveBeenLastCalledWith(value);
+    });
+
     it.each([
         null,
         { ...report(7).autoscaling, added: -1 },
@@ -297,6 +305,10 @@ describe('metrics background refresh', () => {
                 maps: [{ ...value.maps[0], running: { average: 1, peak: 1, capturedHours: null } }]
             },
             { ...value, autoscalingPaused: undefined },
+            ...[undefined, null, '90', -1, 1.5].map((metricsKeepDays) => ({
+                ...value,
+                metricsKeepDays
+            })),
             { ...value, running: undefined },
             { ...value, previous: { ...value.previous, running: undefined } },
             { ...value, maps: [{ ...value.maps[0], policy: { id: 'moon' } }] },