implement firestore.getAll mock

Author: squirly

src/firestore.js

@@ -57,6 +57,15 @@ MockFirestore.prototype.toString = function () {
   return this.path;
 };
 
+MockFirestore.prototype.getAll = function(/* ...docs */) {
+  var docs = Array.from(arguments);
+  return Promise.all(
+    docs.map(function(doc) {
+      return doc.get();
+    })
+  );
+};
+
 MockFirestore.prototype.runTransaction = function(transFunc) {
   var batch = this.batch();
   batch.get = function(doc) {

test/unit/firestore.js

@@ -186,4 +186,25 @@ describe('MockFirestore', function () {
       db.flush();
     });
   });
+
+  describe('getAll', function() {
+    it('', function() {
+      var doc1 = db.doc('doc1');
+      var doc2 = db.doc('doc2');
+      var doc3 = db.doc('doc3');
+
+      db.autoFlush();
+
+      doc1.set({value: 1});
+      doc2.set({value: 2});
+
+      return db
+        .getAll(doc1, doc2, doc3)
+        .then(function(snaps) {
+          expect(snaps[0].data()).to.deep.equal({value: 1});
+          expect(snaps[1].data()).to.deep.equal({value: 2});
+          expect(snaps[2].exists).to.equal(false);
+        });
+    });
+  });
 });