From a8a0e047c1dcdf506de523b2628014e34f6a3438 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ney=20Sim=C3=B5es?= <neysimoes@gmail.com>
Date: Sat, 23 Sep 2017 02:45:02 -0300
Subject: [PATCH] fix(uiDateMask): return null should handle corner cases
 (#295)

BREAKING CHANGE uiDateMask used to return the input value when empty now it will return null
---
 src/global/date/date.js      | 2 +-
 src/global/date/date.test.js | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/global/date/date.js b/src/global/date/date.js
index 82992486..22412d32 100644
--- a/src/global/date/date.js
+++ b/src/global/date/date.js
@@ -29,7 +29,7 @@ function DateMaskDirective($locale) {
 
 			function formatter(value) {
 				if (ctrl.$isEmpty(value)) {
-					return value;
+					return null;
 				}
 
 				var cleanValue = value;
diff --git a/src/global/date/date.test.js b/src/global/date/date.test.js
index 5baebc9b..abc73505 100644
--- a/src/global/date/date.test.js
+++ b/src/global/date/date.test.js
@@ -86,7 +86,7 @@ describe('ui-date-mask', function() {
 		tests.forEach(function(test) {
 			$rootScope.model = test.modelValue;
 			$rootScope.$digest();
-			expect(model.$viewValue).toBe(test.viewValue);
+			expect(model.$viewValue).toBe(null);
 		});
 	}));
 });