test suite: separate package.lisp file

test/package.lisp

@@ -0,0 +1,6 @@
+(defpackage trivial-gray-streams-test 
+  (:use :cl :trivial-gray-streams)
+  (:shadow :method)
+  (:export #:run-tests
+           #:failed-test-names))
+

test/test-framework.lisp

@@ -1,7 +1,3 @@
-(defpackage trivial-gray-streams-test 
-  (:use :cl :trivial-gray-streams)
-  (:shadow :method))
-
 (in-package :trivial-gray-streams-test)
 
 ;;; test framework

trivial-gray-streams-test.asd

@@ -5,4 +5,6 @@
   :depends-on (:trivial-gray-streams)
   :pathname #P"test/"
   :serial t
-  :components ((:file "test-framework") (:file "test")))
+  :components ((:file "package")
+               (:file "test-framework")
+               (:file "test")))