JS: Add JSDoc test

javascript/ql/test/library-tests/TypeAnnotations/JSDoc/JSDocTypeAnnotations.expected

@@ -0,0 +1,21 @@
+test_isString
+| string |
+test_isNumber
+| number |
+test_QualifiedName
+| VarType | VarType |
+| boolean | boolean |
+| foo.bar.baz | foo.bar.baz |
+| number | number |
+| string | string |
+test_ParameterType
+| tst.js:7:12:7:12 | x | string |
+| tst.js:7:15:7:15 | y | number? |
+| tst.js:7:18:7:18 | z | foo.bar.baz |
+test_VarType
+| tst.js:7:12:7:12 | x | string |
+| tst.js:7:15:7:15 | y | number? |
+| tst.js:7:18:7:18 | z | foo.bar.baz |
+| tst.js:11:7:11:7 | w | VarType |
+test_ReturnType
+| tst.js:7:1:12:1 | functio ... null;\\n} | boolean |

javascript/ql/test/library-tests/TypeAnnotations/JSDoc/JSDocTypeAnnotations.ql

@@ -0,0 +1,25 @@
+import javascript
+
+query TypeAnnotation test_isString() {
+  result.isString()
+}
+
+query TypeAnnotation test_isNumber() {
+  result.isNumber()
+}
+
+query TypeAnnotation test_QualifiedName(string name) {
+  result.hasQualifiedName(name)
+}
+
+query TypeAnnotation test_ParameterType(Parameter p) {
+  result = p.getTypeAnnotation()
+}
+
+query TypeAnnotation test_VarType(VarDecl decl) {
+  result = decl.getTypeAnnotation()
+}
+
+query TypeAnnotation test_ReturnType(Function f) {
+  result = f.getReturnTypeAnnotation()
+}

javascript/ql/test/library-tests/TypeAnnotations/JSDoc/tst.js

@@ -0,0 +1,12 @@
+/**
+ * @param {string} x
+ * @param {number?} y
+ * @param {foo.bar.baz} z
+ * @returns {boolean}
+ */
+function f(x, y, z) {
+  /**
+   * @type {VarType}
+   */
+  var w = null;
+}