Units.b(Clojure): add a test case for extracting variables

Co-authored-by: Masatake YAMATO <yamato@redhat.com>

Author: aartaka

Units/parser-clojure.r/clojure-vars.b/args.ctags

@@ -0,0 +1,2 @@
+--sort=no
+--fields=+KzZ

Units/parser-clojure.r/clojure-vars.b/expected.tags

@@ -0,0 +1,7 @@
+vars.test	input.clj	/^(ns vars.test)$/;"	kind:namespace
+var	input.clj	/^(def var 'var)$/;"	kind:variable	namespace:vars.test
+doc-var	input.clj	/^(def doc-var "Documentation" 'var)$/;"	kind:variable	scope:namespace:vars.test
+dynamic-var	input.clj	/^(def dynamic-var ^:dynamic 'var)$/;"	kind:variable	scope:namespace:vars.test
+const-var	input.clj	/^(def const-var ^:const 'var)$/;"	kind:variable	scope:namespace:vars.test
+once-var	input.clj	/^(defonce once-var 'evaluated-once)$/;"	kind:variable	scope:namespace:vars.test
+fn-var	input.clj	/^(def fn-var (fn [] true))$/;"	kind:function	scope:namespace:vars.test

Units/parser-clojure.r/clojure-vars.b/input.clj

@@ -0,0 +1,13 @@
+(ns vars.test)
+
+(def var 'var)
+
+(def doc-var "Documentation" 'var)
+
+(def dynamic-var ^:dynamic 'var)
+
+(def const-var ^:const 'var)
+
+(defonce once-var 'evaluated-once)
+
+(def fn-var (fn [] true))