From c727d56ed050b3c1ea3331a5a7e3e1b0ae295f77 Mon Sep 17 00:00:00 2001
From: Nick Hall <nick-h@gramps-project.org>
Date: Wed, 31 May 2017 18:05:04 +0100
Subject: [PATCH] Add unit tests for empty dates

---
 gramps/gen/lib/test/date_test.py | 37 ++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/gramps/gen/lib/test/date_test.py b/gramps/gen/lib/test/date_test.py
index c6a6611e1..d4312637b 100644
--- a/gramps/gen/lib/test/date_test.py
+++ b/gramps/gen/lib/test/date_test.py
@@ -536,5 +536,42 @@ class Test_set_newyear(BaseDateTest):
             except DateError:
                 self.assertTrue(should_raise, message)
 
+#-------------------------------------------------------------------------
+#
+# EmptyDateTest
+#
+#-------------------------------------------------------------------------
+class EmptyDateTest(BaseDateTest):
+    """
+    Tests for empty dates.
+    """
+    def test_empty(self):
+        d = Date()
+        self.assertTrue(d.is_empty())
+
+    def test_text_only_empty(self):
+        d = Date()
+        d.set(text='First of Jan',
+              modifier=Date.MOD_TEXTONLY)
+        self.assertFalse(d.is_empty())
+
+    def test_single_empty(self):
+        d = Date()
+        d.set(value=(1, 1, 1900, False),
+              modifier=Date.MOD_NONE)
+        self.assertFalse(d.is_empty())
+
+    def test_range_empty(self):
+        d = Date()
+        d.set(value=(1, 1, 1900, False, 1, 1, 1910, False),
+              modifier=Date.MOD_RANGE)
+        self.assertFalse(d.is_empty())
+
+    def test_span_empty(self):
+        d = Date()
+        d.set(value=(1, 1, 1900, False, 1, 1, 1910, False),
+              modifier=Date.MOD_SPAN)
+        self.assertFalse(d.is_empty())
+
 if __name__ == "__main__":
     unittest.main()