From 20f085a1f20cfdc256f148243d7c0b0af9eb4e83 Mon Sep 17 00:00:00 2001
From: Jonn Smith <jonn@broadinstitute.org>
Date: Mon, 9 Apr 2018 16:53:28 -0400
Subject: [PATCH] Fixed the properties issue:
 https://github.com/lviggiano/owner/issues/226

---
 .../java/org/aeonbits/owner/ConfigURIFactory.java     | 11 +++++++++--
 .../java/org/aeonbits/owner/ConfigURIFactoryTest.java |  7 +++++++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/owner/src/main/java/org/aeonbits/owner/ConfigURIFactory.java b/owner/src/main/java/org/aeonbits/owner/ConfigURIFactory.java
index 3d50f84c..b7276db0 100644
--- a/owner/src/main/java/org/aeonbits/owner/ConfigURIFactory.java
+++ b/owner/src/main/java/org/aeonbits/owner/ConfigURIFactory.java
@@ -40,8 +40,15 @@ URI newURI(String spec) throws URISyntaxException {
                 return null;
             return url.toURI();
         } else if (fixed.startsWith(FILE_PROTOCOL)) {
-            String path = fixSpacesToPercentTwenty(fixed);
-            return new URI(path);
+            // This check fixes the case where an environment variable has been
+            // specified for the path to the config file, but that environment
+            // variable is blank / undefined.
+            if ( fixed.equals(FILE_PROTOCOL) ) {
+                return new URI("");
+            } else {
+                String path = fixSpacesToPercentTwenty(fixed);
+                return new URI(path);
+            }
         } else {
             return new URI(fixed);
         }
diff --git a/owner/src/test/java/org/aeonbits/owner/ConfigURIFactoryTest.java b/owner/src/test/java/org/aeonbits/owner/ConfigURIFactoryTest.java
index 66871382..f1467c84 100644
--- a/owner/src/test/java/org/aeonbits/owner/ConfigURIFactoryTest.java
+++ b/owner/src/test/java/org/aeonbits/owner/ConfigURIFactoryTest.java
@@ -26,4 +26,11 @@ public void shouldReturnAnURI() throws URISyntaxException {
         URI uri = h.newURI("classpath:test.properties");
         assertNotNull(uri);
     }
+
+    @Test
+    public void shouldReturnAUriWithEmptyFilePath() throws URISyntaxException {
+        ConfigURIFactory h = new ConfigURIFactory(this.getClass().getClassLoader(), new VariablesExpander(new Properties()));
+        URI uri = h.newURI("file:");
+        assertNotNull(uri);
+    }
 }