Add test for jsdoc syntactic classification for function declaration

Author: zhengbli

tests/cases/fourslash/syntacticClassificationsDocComment4.ts

@@ -0,0 +1,24 @@
+/// <reference path="fourslash.ts"/>
+
+//// /** @param {number} p1 */
+//// function foo(p1) {}
+
+var c = classification;
+verify.syntacticClassificationsAre(
+    c.comment("/** "),
+    c.punctuation("@"),
+    c.docCommentTagName("param"),
+    c.comment(" "),
+    c.punctuation("{"),
+    c.keyword("number"),
+    c.punctuation("}"),
+    c.comment(" "),
+    c.parameterName("p1"),
+    c.comment(" */"),
+    c.keyword("function"),
+    c.identifier("foo"),
+    c.punctuation("("),
+    c.parameterName("p1"),
+    c.punctuation(")"),
+    c.punctuation("{"),
+    c.punctuation("}"));