write tests for metHelper

www/__tests__/metHelper.test.ts

@@ -0,0 +1,45 @@
+import { getMet, setUseCustomMET } from '../js/metrics/metHelper';
+import { mockBEMUserCache } from '../__mocks__/cordovaMocks';
+import { mockLogger } from '../__mocks__/globalMocks';
+import fakeLabels from '../__mocks__/fakeLabels.json';
+import { getConfig } from '../js/config/dynamicConfig';
+import { initCustomDatasetHelper } from '../js/metrics/CustomMetricsHelper';
+
+mockBEMUserCache();
+mockLogger();
+
+global.fetch = (url: string) =>
+  new Promise((rs, rj) => {
+    setTimeout(() =>
+      rs({
+        text: () =>
+          new Promise((rs, rj) => {
+            let myJSON = JSON.stringify(fakeLabels);
+            setTimeout(() => rs(myJSON), 100);
+          }),
+      }),
+    );
+  }) as any;
+
+beforeEach(() => {
+  setUseCustomMET(false);
+});
+
+it('gets met for mode and speed', () => {
+  expect(getMet('WALKING', 1.47523, 0)).toBe(4.3);
+  expect(getMet('BICYCLING', 4.5, 0)).toBe(6.8);
+  expect(getMet('UNICYCLE', 100, 0)).toBe(0);
+  expect(getMet('CAR', 25, 1)).toBe(0);
+});
+
+it('gets custom met for mode and speed', async () => {
+  initCustomDatasetHelper(getConfig());
+  setUseCustomMET(true);
+  await new Promise((r) => setTimeout(r, 500));
+  expect(getMet('walk', 1.47523, 0)).toBe(4.3);
+  expect(getMet('bike', 4.5, 0)).toBe(6.8);
+  expect(getMet('unicycle', 100, 0)).toBe(0);
+  expect(getMet('drove_alone', 25, 1)).toBe(0);
+  expect(getMet('e-bike', 6, 1)).toBe(4.9);
+  expect(getMet('e-bike', 12, 1)).toBe(4.9);
+});

www/js/metrics/metHelper.ts

@@ -3,8 +3,8 @@ import { standardMETs } from './metDataset';
 
 let useCustom = false;
 
-export const setUseCustomMET = function () {
-  useCustom = true;
+export const setUseCustomMET = function (val: boolean) {
+  useCustom = val;
 };
 
 const getMETs = function () {