JS: add test

javascript/ql/test/library-tests/frameworks/Firebase/FirebaseRef.expected

@@ -0,0 +1,17 @@
+| tst.js:5:1:5:22 | fb.data ... ef('x') |
+| tst.js:7:3:7:7 | x.ref |
+| tst.js:7:3:7:14 | x.ref.parent |
+| tst.js:10:1:10:25 | admin.d ... ef('x') |
+| tst.js:12:3:12:7 | x.ref |
+| tst.js:12:3:12:14 | x.ref.parent |
+| tst.js:17:3:17:7 | x.ref |
+| tst.js:17:3:17:14 | x.ref.parent |
+| tst.js:23:3:23:7 | x.ref |
+| tst.js:23:3:23:14 | x.ref.parent |
+| tst.js:32:12:32:42 | this.fi ... .ref(x) |
+| tst.js:46:12:46:42 | this.fi ... .ref(x) |
+| tst.js:50:12:50:25 | this.getRef(x) |
+| tst.js:50:12:50:34 | this.ge ... hild(x) |
+| tst.js:54:5:54:37 | this.fi ... ef('x') |
+| tst.js:58:1:58:61 | new Fir ... /news') |
+| tst.js:59:1:59:38 | new Fir ... /news') |

javascript/ql/test/library-tests/frameworks/Firebase/FirebaseRef.ql

@@ -0,0 +1,3 @@
+import javascript
+
+select Firebase::Database::ref()

javascript/ql/test/library-tests/frameworks/Firebase/FirebaseSnapshot.expected

@@ -0,0 +1,10 @@
+| tst.js:5:1:8:2 | fb.data ... ent;\\n}) |
+| tst.js:5:38:5:38 | x |
+| tst.js:10:1:13:2 | admin.d ... ent;\\n}) |
+| tst.js:10:41:10:41 | x |
+| tst.js:15:38:15:38 | x |
+| tst.js:20:38:20:38 | x |
+| tst.js:21:3:21:10 | x.before |
+| tst.js:22:3:22:9 | x.after |
+| tst.js:50:12:50:48 | this.ge ... value') |
+| tst.js:60:1:60:39 | new Fir ... em('x') |

javascript/ql/test/library-tests/frameworks/Firebase/FirebaseSnapshot.ql

@@ -0,0 +1,3 @@
+import javascript
+
+select Firebase::snapshot()

javascript/ql/test/library-tests/frameworks/Firebase/FirebaseVal.expected

@@ -0,0 +1,6 @@
+| tst.js:6:3:6:9 | x.val() |
+| tst.js:11:3:11:9 | x.val() |
+| tst.js:16:3:16:9 | x.val() |
+| tst.js:21:3:21:16 | x.before.val() |
+| tst.js:22:3:22:15 | x.after.val() |
+| tst.js:61:36:61:36 | x |

javascript/ql/test/library-tests/frameworks/Firebase/FirebaseVal.ql

@@ -0,0 +1,4 @@
+import javascript
+
+from Firebase::FirebaseVal val
+select val

javascript/ql/test/library-tests/frameworks/Firebase/tst.js

@@ -0,0 +1,70 @@
+import * as fb from 'firebase/app';
+import * as admin from 'firebase-admin';
+import * as functions from 'firebase-functions';
+
+fb.database().ref('x').once('value', x => {
+  x.val();
+  x.ref.parent;
+});
+
+admin.database().ref('x').once('value', x => {
+  x.val();
+  x.ref.parent;
+});
+
+functions.database.ref('x').onCreate(x => {
+  x.val();
+  x.ref.parent;
+});
+
+functions.database.ref('x').onUpdate(x => {
+  x.before.val();
+  x.after.val();
+  x.ref.parent;
+});
+
+class FirebaseWrapper {
+  constructor(firebase) {
+    this.firebase = firebase;
+  }
+
+  getRef(x) {
+    return this.firebase.database().ref(x);
+  }
+}
+
+class FirebaseWrapper2 {
+  constructor() {
+    this.init();
+  }
+
+  init() {
+    this.firebase = fb.initializeApp();
+  }
+
+  getRef(x) {
+    return this.firebase.database().ref(x);
+  }
+
+  getNewsItem(x) {
+    return this.getRef(x).child(x).once('value');
+  }
+
+  adjustValue(fn) {
+    this.firebase.database().ref('x').transaction(fn);
+  }
+}
+
+new FirebaseWrapper(firebase.initializeApp()).getRef('/news');
+new FirebaseWrapper2().getRef('/news');
+new FirebaseWrapper2().getNewsItem('x');
+new FirebaseWrapper2().adjustValue(x => x + 1);
+
+class Box {
+  constructor(x) {
+    this.x = x;
+  }
+}
+let box1 = new Box(fb.database());
+let box2 = new Box(whatever());
+box2.x.ref(); // not a firebase ref