Include :all test selector by default.

src/leiningen/test.clj

@@ -39,7 +39,8 @@ each namespace and print an overall summary."
         nses (if (or (empty? args) (every? keyword? args))
                (sort (namespaces-in-dir (:test-path project)))
                (filter symbol? args))
-        selectors (map (:test-selectors project) (filter keyword? args))
+        selectors (map (merge {:all '(constantly true)}
+                              (:test-selectors project)) (filter keyword? args))
         selectors (if (and (empty? selectors)
                            (:default (:test-selectors project)))
                     [(:default (:test-selectors project))]

todo.org

@@ -51,8 +51,8 @@ See also http://github.com/technomancy/leiningen/issues
    the standard lucene index system that Maven repositories offer.
    This would also mean getting Clojars to produce those indices.
 * For 1.4
-** TODO :all and :none test-selectors built-in
 ** TODO :uberjar-exclusions?
+** DONE :all test-selector built-in
 ** DONE test selectors need to support things like constantly, complement
 ** DONE detect missing level of nesting in project.clj's deps/dev-deps
 ** DONE clear out non-transitive .class files after AOT