Time format: 0 seconds is a number (#27376)

packages/grafana-data/src/valueFormats/dateTimeFormatters.test.ts

@@ -12,6 +12,7 @@ import {
   toDurationInHoursMinutesSeconds,
   toDurationInDaysHoursMinutesSeconds,
   toNanoSeconds,
+  toSeconds,
 } from './dateTimeFormatters';
 import { formattedValueToString } from './valueFormats';
 import { toUtc, dateTime } from '../datetime/moment_wrapper';
@@ -331,3 +332,11 @@ describe('to nanoseconds', () => {
     expect(tenDays.suffix).toBe(' day');
   });
 });
+
+describe('seconds', () => {
+  it('should show 0 as 0', () => {
+    const zeroSeconds = toSeconds(0);
+    expect(zeroSeconds.text).toBe('0');
+    expect(zeroSeconds.suffix).toBe(' s');
+  });
+});

packages/grafana-data/src/valueFormats/dateTimeFormatters.ts

@@ -103,6 +103,11 @@ export function toSeconds(size: number, decimals?: DecimalCount, scaledDecimals?
     return { text: '' };
   }
 
+  // If 0, use s unit instead of ns
+  if (size === 0) {
+    return { text: '0', suffix: ' s' };
+  }
+
   // Less than 1 µs, divide in ns
   if (Math.abs(size) < 0.000001) {
     return toFixedScaled(size * 1e9, decimals, trySubstract(scaledDecimals, decimals), -9, ' ns');