added tests for clearFirestoreData

Author: ShoeBoom

package.json

@@ -11,6 +11,9 @@
     "pretest": "node_modules/.bin/tsc",
     "test": "mocha .tmp/spec/index.spec.js",
     "posttest": "npm run lint && rm -rf .tmp",
+    "preintegrationTest": "node_modules/.bin/tsc",
+    "integrationTest": "firebase emulators:exec --project=not-a-project --only firestore 'mocha .tmp/spec/integration/**/*.spec.js'",
+    "postintegrationTest": "rm -rf .tmp",
     "format": "prettier --check '**/*.{json,ts,yml,yaml}'",
     "format:fix": "prettier --write '**/*.{json,ts,yml,yaml}'"
   },
@@ -44,6 +47,7 @@
     "chai": "^4.2.0",
     "firebase-admin": "~8.9.0",
     "firebase-functions": "^3.3.0",
+    "firebase-tools": "^8.9.2",
     "mocha": "^6.2.2",
     "prettier": "^1.19.1",
     "sinon": "^7.5.0",

spec/integration/providers/firestore.spec.ts

@@ -0,0 +1,44 @@
+import { expect } from 'chai';
+import { firestore, initializeApp } from 'firebase-admin';
+import fft = require('../../../src/index');
+
+before(() => {
+  initializeApp();
+});
+
+describe('providers/firestore', () => {
+  it('clears database with clearFirestoreData', async () => {
+    const test = fft({ projectId: 'not-a-project' });
+    const db = firestore();
+
+    await Promise.all([
+      db
+        .collection('test')
+        .doc('doc1')
+        .set({}),
+      db
+        .collection('test')
+        .doc('doc1')
+        .collection('test')
+        .doc('doc2')
+        .set({}),
+    ]);
+
+    await test.firestore.clearFirestoreData({ projectId: 'not-a-project' });
+
+    const docs = await Promise.all([
+      db
+        .collection('test')
+        .doc('doc1')
+        .get(),
+      db
+        .collection('test')
+        .doc('doc1')
+        .collection('test')
+        .doc('doc2')
+        .get(),
+    ]);
+    expect(docs[0].exists).to.be.false;
+    expect(docs[1].exists).to.be.false;
+  });
+});