JS: Add test showing lack of flow out of inner function

Author: asger-semmle

javascript/ql/test/library-tests/TypeTracking/ClassStyle.expected

@@ -24,6 +24,9 @@ test_Connection
 | tst.js:63:38:63:77 | api.cha ... ction() |
 | tst.js:67:14:67:47 | MyAppli ... nection |
 | tst.js:78:35:78:49 | getConnection() |
+| tst.js:80:16:80:19 | conn |
+| tst.js:84:22:84:22 | x |
+| tst.js:96:7:96:21 | getConnection() |
 | tst_conflict.js:6:38:6:77 | api.cha ... ction() |
 test_DataCallback
 | client.js:3:28:3:34 | x => {} |

javascript/ql/test/library-tests/TypeTracking/PredicateStyle.expected

@@ -12,6 +12,8 @@ apiObject
 connection
 | type tracker with call steps | tst.js:7:15:7:18 | conn |
 | type tracker with call steps | tst.js:11:5:11:19 | this.connection |
+| type tracker with call steps | tst.js:80:16:80:19 | conn |
+| type tracker with call steps | tst.js:84:22:84:22 | x |
 | type tracker with call steps with property connection | tst.js:7:14:7:13 | this |
 | type tracker without call steps | client.js:1:10:1:27 | exportedConnection |
 | type tracker without call steps | tst.js:16:10:16:49 | api.cha ... ction() |
@@ -25,6 +27,7 @@ connection
 | type tracker without call steps | tst.js:63:38:63:77 | api.cha ... ction() |
 | type tracker without call steps | tst.js:67:14:67:47 | MyAppli ... nection |
 | type tracker without call steps | tst.js:78:35:78:49 | getConnection() |
+| type tracker without call steps | tst.js:96:7:96:21 | getConnection() |
 | type tracker without call steps | tst_conflict.js:6:38:6:77 | api.cha ... ction() |
 | type tracker without call steps with property MyApplication.namespace.connection | file://:0:0:0:0 | global access path |
 | type tracker without call steps with property conflict | tst.js:63:3:63:25 | MyAppli ... mespace |

javascript/ql/test/library-tests/TypeTracking/tst.js

@@ -76,3 +76,21 @@ function useConnection() {
 }
 
 export const exportedConnection = getConnection();
+
+function outer(conn) {
+  function innerCapture() {
+    return conn;
+  }
+  function innerCall(x) {
+    return x;
+  }
+
+  innerCapture();
+  innerCall(conn);
+  innerCall(somethingElse());
+
+  function otherInner() {
+    innerCapture();
+  }
+}
+outer(getConnection());