Add two simple tests.

test/ListContextCommandTest.py

+import CommandTest
+import TestFacilities
+import ListContextCommand
+
+class ListContextCommandTest(CommandTest.CommandTest):
+    def test_contexts1(self):
+        todolist = TestFacilities.load_file_to_todolist("data/TodoListTest.txt")
+        command = ListContextCommand.ListContextCommand([""], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertEquals(self.output,"Context1\nContext2\n")
+        self.assertFalse(self.errors)
+
+    def test_contexts2(self):
+        todolist = TestFacilities.load_file_to_todolist("data/TodoListTest.txt")
+        command = ListContextCommand.ListContextCommand(["aaa"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertEquals(self.output,"Context1\nContext2\n")
+        self.assertFalse(self.errors)

test/ListProjectCommandTest.py

+import CommandTest
+import TestFacilities
+import ListProjectCommand
+
+class ListProjectCommandTest(CommandTest.CommandTest):
+    def test_projects1(self):
+        todolist = TestFacilities.load_file_to_todolist("data/TodoListTest.txt")
+        command = ListProjectCommand.ListProjectCommand([""], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertEquals(self.output,"Project1\nProject2\n")
+        self.assertFalse(self.errors)
+
+    def test_projects2(self):
+        todolist = TestFacilities.load_file_to_todolist("data/TodoListTest.txt")
+        command = ListProjectCommand.ListProjectCommand(["aaa"], todolist, self.out, self.error)
+        command.execute()
+
+        self.assertEquals(self.output,"Project1\nProject2\n")
+        self.assertFalse(self.errors)