Add unit tests for number format util functions

Author: annavik

ui/src/utils/numberFormats/numberFormats.test.ts

@@ -0,0 +1,22 @@
+import { bytesToMB, getTotalLabel } from '.'
+
+describe('bytesToMB', () => {
+  test('will convert bytes to MB', () => {
+    const sizeBytes = 1024 * 1024 * 30
+    const sizeMB = 30
+    const result = bytesToMB(sizeBytes)
+    expect(result).toEqual(sizeMB)
+  })
+})
+
+describe('getTotalLabel', () => {
+  test(`will show the sample length followed by a '+' if the known total is more than the sample length`, () => {
+    const result = getTotalLabel(10, 100)
+    expect(result).toEqual('10+')
+  })
+
+  test('will show the sample length if the known total is equal to the sample length', () => {
+    const result = getTotalLabel(10, 10)
+    expect(result).toEqual('10')
+  })
+})