Re implementing a basic test for db/gpx.ts

.gitignore

@@ -2,4 +2,5 @@ node_modules/
 dist/
 android/
 ios/
-vite.config.ts.timestamp-*.mjs
+vite.config.ts.timestamp-*.mjs
+$*$/

src/db/gpx.test.ts

@@ -1,5 +1,88 @@
-import { describe, it } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+
+import { initDb } from '.';
+import { existsGpx, putNewGpx } from './gpx';
+
+const test = it;
+
+declare global {
+  var db: any;
+  var dbReady: boolean;
+}
+
+const originalDb = globalThis.db;
+const originalDateNow = globalThis.Date.now;
 
 describe('putNewGpx', () => {
-  it("doesn't return an error", () => {});
+  beforeEach(() => {
+    globalThis.db = { put: vi.fn() };
+    globalThis.Date.now = () => 0;
+  });
+  afterEach(() => {
+    globalThis.db = originalDb;
+    globalThis.Date.now = originalDateNow;
+  });
+
+  it('db.put() a new Gpx when required', async () => {
+    await putNewGpx({ gpx: 0 });
+    expect(globalThis.db.put).toBeCalledWith({
+      _id: 'gpx/0000000000000000',
+      _rev: undefined,
+      doc: {
+        $: {
+          creator: 'dyomedea version 0.000002',
+          version: '1.1',
+          xmlns: 'http://www.topografix.com/GPX/1/1',
+          'xmlns:dyo': 'http://xmlns.dyomedea.com/',
+          'xmlns:gpxtpx':
+            'http://www.garmin.com/xmlschemas/TrackPointExtension/v1',
+          'xmlns:gpxx': 'http://www.garmin.com/xmlschemas/GpxExtensions/v3',
+          'xmlns:wptx1':
+            'http://www.garmin.com/xmlschemas/WaypointExtension/v1',
+          'xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
+          'xsi:schemaLocation':
+            'http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www8.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/WaypointExtension/v1 http://www8.garmin.com/xmlschemas/WaypointExtensionv1.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd',
+        },
+        extensions: undefined,
+        metadata: {
+          author: undefined,
+          bounds: undefined,
+          copyright: undefined,
+          desc: undefined,
+          extensions: undefined,
+          keywords: undefined,
+          link: undefined,
+          name: undefined,
+          time: '1970-01-01T00:00:00.000Z',
+        },
+        rte: undefined,
+        trk: undefined,
+        wpt: undefined,
+      },
+      type: 'gpx',
+    });
+  });
+});
+
+describe('The gpx module with a real db', () => {
+  beforeEach(async () => {
+    await initDb({});
+    globalThis.Date.now = () => 0;
+  });
+  afterEach(async () => {
+    await db.destroy();
+    db = undefined;
+    globalThis.Date.now = originalDateNow;
+  });
+
+  test("existsGpx returns false if the GPX doesn't exist", async () => {
+    const exists = await existsGpx({ gpx: 1 });
+    expect(exists).toBeFalsy();
+  });
+  test('existsGpx returns false if the GPX exists', async () => {
+    const id = { gpx: 1 };
+    await putNewGpx(id);
+    const exists = await existsGpx(id);
+    expect(exists).toBeTruthy();
+  });
 });