Merge pull request #496 from mattmazzola/authority-path-error

Improve error message when Authority does not contain path

Author: siddhijain

src/main/java/com/microsoft/aad/msal4j/Authority.java

@@ -117,7 +117,7 @@ static void validateAuthority(URL authorityUrl) {
 
         if (segments.length == 0) {
             throw new IllegalArgumentException(
-                    IllegalArgumentExceptionMessages.AUTHORITY_URI_EMPTY_PATH_SEGMENT);
+                    IllegalArgumentExceptionMessages.AUTHORITY_URI_MISSING_PATH_SEGMENT);
         }
 
         for (String segment : segments) {

src/main/java/com/microsoft/aad/msal4j/IllegalArgumentExceptionMessages.java

@@ -7,6 +7,8 @@ class IllegalArgumentExceptionMessages {
 
     final static String AUTHORITY_URI_EMPTY_PATH_SEGMENT = "Authority Uri should not have empty path segments";
 
+    final static String AUTHORITY_URI_MISSING_PATH_SEGMENT = "Authority Uri must have at least one path segment. This is usually 'common' or the application's tenant id.";
+
     final static String AUTHORITY_URI_EMPTY_PATH = "Authority Uri should have at least one segment in the path";
 
 }