Fix 'findExecutable...' bug for full-path spec (#35)

Author: sbabcoc

src/main/java/com/nordstrom/common/file/PathUtils.java

@@ -267,7 +267,7 @@ public String getNewName() {
      */
     public static String findExecutableOnSystemPath(final String nameOrPath) {
         List<String> paths = getSystemPathList();
-        paths.add(0, "");
+        paths.add(0, null); // check full path first
         for (String path : paths) {
             for (String ending : ENDINGS) {
                 File file = new File(path, nameOrPath + ending);

src/test/java/com/nordstrom/common/file/PathUtilsTest.java

@@ -146,6 +146,13 @@ public void testFindExecutableOnSystemPath() {
         assertNotNull(path);
     }
 
+    @Test
+    public void testFindExecutableByFullPath() {
+    	String javaPath = System.getProperty("java.home") + File.separator + "bin" + File.separator + "java";
+        String path = PathUtils.findExecutableOnSystemPath(javaPath);
+        assertNotNull(path);
+    }
+
     @Test
     public void testGetSystemPath() {
         String systemPath = PathUtils.getSystemPath();