[source-files] Restrict to when JDK sources are present

Author: alexander-yakushev

test/orchard/java/source_files_test.clj

@@ -1,12 +1,14 @@
 (ns orchard.java.source-files-test
   (:require [clojure.test :refer [deftest is testing]]
-            [orchard.java.source-files :as src-files]))
-
-(deftest class->source-file-url-test
-  (is (src-files/class->source-file-url mx.cider.orchard.LruMap)) ;; classpath
-  (is (src-files/class->source-file-url Thread)) ;; JDK
-  (is (src-files/class->source-file-url clojure.lang.PersistentVector)) ;; Clojure
-  (is (nil? (src-files/class->source-file-url clojure.core.Eduction)))) ;; record
+            [orchard.java.source-files :as src-files]
+            [orchard.test.util :as util]))
+
+(when util/jdk-sources-present?
+  (deftest class->source-file-url-test
+    (is (src-files/class->source-file-url mx.cider.orchard.LruMap)) ;; classpath
+    (is (src-files/class->source-file-url Thread))                  ;; JDK
+    (is (src-files/class->source-file-url clojure.lang.PersistentVector)) ;; Clojure
+    (is (nil? (src-files/class->source-file-url clojure.core.Eduction))))) ;; record
 
 ;; Download sources testing