Add tests for groups

test/data/ListCommandGroupTest.txt

++A only test:test_group1
++B only test:test_group1
++A and +B test:test_group1
+No project test:test_group1
+Different item test:test_group2 l:1
+Another item test:test_group2 l:0
+Test 1 due:2016-12-06 test:test_group3
+Test 2 due:2016-12-07 test:test_group3
+Test 1 t:2016-12-06 test:test_group4 test:test_group5
+Test 2 t:2016-12-07 test:test_group4 test:test_group5
+Group by non-existing tag test:test_group6
+Sort descending +A test:test_group7
+Sort descending +B test:test_group7
+Inner sort 1 +A @A test:test_group8
+Inner sort 2 +A @B test:test_group8
+Inner sort 3 +B @A test:test_group8
+Inner sort 4 +B @B test:test_group8
+Inner sort 1 +A test:test_group9
+Inner sort 2 +A test:test_group9

test/test_list_command.py

@@ -552,5 +552,172 @@ class ListCommandDotTest(CommandTest):
         self.assertEqual(self.errors, "")
 
 
+@freeze_time('2016, 12, 6')
+class ListCommandGroupTest(CommandTest):
+    def test_group1(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-g", "project", "test:test_group1"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+Project: A
+==========
+|  1| +A only test:test_group1
+|  3| +A and +B test:test_group1
+
+Project: B
+==========
+|  3| +A and +B test:test_group1
+|  2| +B only test:test_group1
+
+Project: None
+=============
+|  4| No project test:test_group1
+""")
+
+    def test_group2(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-g", "l", "test:test_group2"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+l: 0
+====
+|  6| Another item l:0 test:test_group2
+
+l: 1
+====
+|  5| Different item l:1 test:test_group2
+""")
+
+    def test_group3(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-g", "due", "test:test_group3"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+due: today
+==========
+|  7| Test 1 test:test_group3 due:2016-12-06
+
+due: in a day
+=============
+|  8| Test 2 test:test_group3 due:2016-12-07
+""")
+
+    def test_group4(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-g", "t", "test:test_group4"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+t: today
+========
+|  9| Test 1 test:test_group4 test:test_group5 t:2016-12-06
+""")
+
+    def test_group5(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-x", "-g", "t", "test:test_group5"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+t: today
+========
+|  9| Test 1 test:test_group4 test:test_group5 t:2016-12-06
+
+t: in a day
+===========
+| 10| Test 2 test:test_group4 test:test_group5 t:2016-12-07
+""")
+
+    def test_group6(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-x", "-g", "fake", "test_group6"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+fake: No value
+==============
+| 11| Group by non-existing tag test:test_group6
+""")
+
+    def test_group7(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-x", "-g", "desc:project", "test_group7"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+Project: B
+==========
+| 13| Sort descending +B test:test_group7
+
+Project: A
+==========
+| 12| Sort descending +A test:test_group7
+""")
+
+    def test_group8(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-x", "-g", "project,desc:context", "test_group8"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+Project: A, Context: B
+======================
+| 15| Inner sort 2 +A @B test:test_group8
+
+Project: A, Context: A
+======================
+| 14| Inner sort 1 +A @A test:test_group8
+
+Project: B, Context: B
+======================
+| 17| Inner sort 4 +B @B test:test_group8
+
+Project: B, Context: A
+======================
+| 16| Inner sort 3 +B @A test:test_group8
+""")
+
+    def test_group9(self):
+        todolist = load_file_to_todolist("test/data/ListCommandGroupTest.txt")
+
+        command = ListCommand(["-x", "-g", "project", "-s", "desc:text", "test_group9"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertFalse(todolist.dirty)
+
+        self.assertEqual(self.output, """\
+Project: A
+==========
+| 19| Inner sort 2 +A test:test_group9
+| 18| Inner sort 1 +A test:test_group9
+""")
+
 if __name__ == '__main__':
     unittest.main()