test(error): Add tests for error conditions

test/functions-absent-rules-file/index.js

@@ -0,0 +1,3 @@
+const { integrify } = require('../../lib');
+
+module.exports = integrify(); // Rules will be loaded from "integrify.rules.js"

test/functions-bad-rules-file/index.js

@@ -0,0 +1,3 @@
+const { integrify } = require('../../lib');
+
+module.exports = integrify(); // Rules will be loaded from "integrify.rules.js"

test/functions-bad-rules-file/integrify.rules.js

@@ -0,0 +1,5 @@
+module.exports = [
+  {
+    rule: 'BAD_RULE_3038d3c1644b',
+  },
+];

test/functions/index.js

@@ -3,11 +3,12 @@ const { setState } = require('./stateMachine');
 
 const functions = require('firebase-functions');
 const admin = require('firebase-admin');
-admin.initializeApp({ projectId: 'dummy-project' });
+admin.initializeApp();
 const db = admin.firestore();
 
 integrify({ config: { db, functions } });
 
+// Specify rules in situ
 module.exports.replicateMasterToDetail = integrify({
   rule: 'REPLICATE_ATTRIBUTES',
   source: {
@@ -73,3 +74,6 @@ module.exports.maintainFavoritesCount = integrify({
     attribute: 'favoritesCount',
   },
 });
+
+// Specify rules from "./integrify.rules.js"
+const rulesFromFiles = integrify();

test/functions/integrify.rules.js

@@ -0,0 +1,58 @@
+module.exports = [
+  {
+    rule: 'REPLICATE_ATTRIBUTES',
+    name: 'replicateMasterToDetailFromFile',
+    source: {
+      collection: 'master',
+    },
+    targets: [
+      {
+        collection: 'detail1',
+        foreignKey: 'masterId',
+        attributeMapping: {
+          masterField1: 'detail1Field1',
+          masterField2: 'detail1Field2',
+        },
+      },
+      {
+        collection: 'detail2',
+        foreignKey: 'masterId',
+        attributeMapping: {
+          masterField1: 'detail2Field1',
+          masterField3: 'detail2Field3',
+        },
+        isCollectionGroup: true,
+      },
+    ],
+  },
+  {
+    rule: 'DELETE_REFERENCES',
+    name: 'deleteReferencesToMasterFromFile',
+    source: {
+      collection: 'master',
+    },
+    targets: [
+      {
+        collection: 'detail1',
+        foreignKey: 'masterId',
+      },
+      {
+        collection: 'detail2',
+        foreignKey: 'masterId',
+        isCollectionGroup: true,
+      },
+    ],
+  },
+  {
+    rule: 'MAINTAIN_COUNT',
+    name: 'maintainFavoritesCountFromFile',
+    source: {
+      collection: 'favorites',
+      foreignKey: 'articleId',
+    },
+    target: {
+      collection: 'articles',
+      attribute: 'favoritesCount',
+    },
+  },
+];

test/main.test.js

@@ -2,6 +2,23 @@ const assert = require('chai').assert;
 
 const { integrify } = require('../lib');
 
-it('TODO', function () {
-  assert.equal(1, 1);
+describe('Error conditions', () => {
+  it('should error on bad rule', function () {
+    assert.throws(
+      () => integrify({ rule: 'BAD_RULE_ea8e3a2a2d3e' }),
+      /Unknown rule/i
+    );
+    assert.throws(() => require('./functions-bad-rules-file'), /Unknown rule/i);
+  });
+
+  it('should error on no rule or config', function () {
+    assert.throws(() => integrify(42), /Input must be rule or config/i);
+  });
+
+  it('should error on absent config file', function () {
+    assert.throws(
+      () => require('./functions-absent-rules-file'),
+      /Rules file not found/i
+    );
+  });
 });

test/run-tests.sh

@@ -7,6 +7,7 @@ cd $SCRIPTDIR
 pwd
 rm -rf ../.nyc_output ../coverage
 
+export GCLOUD_PROJECT=dummy-project
 export FIRESTORE_EMULATOR_HOST='localhost:8080'
 npx nyc -r html -r text -r lcov firebase emulators:exec \
   'mocha --bail --exit --jobs 1 --timeout 30s *.test.js'