test(LeanObject): add tests for is_existed()

Author: weakish

tests/test_object.py

@@ -237,7 +237,9 @@ def test_fetch(): # type: () -> None
     album.save()
 
     album_1 = Album.create_without_data(album.id)
+    assert album_1.is_existed() is False
     album_1.fetch(include=['parent'], select=['name', 'parent'])
+    assert album_1.is_existed() is True
     assert album_1.get('parent').get('name') == 'Nightwish'
     assert not album_1.has('title')
 
@@ -252,6 +254,11 @@ def test_has(): # type: () -> None
     assert album.has('bar') is False
 
 
+def test_existence(): # type: () -> None
+    album = Album()
+    assert album.is_existed() is False
+
+
 def test_get_set_acl(): # type: () -> None
     acl = leancloud.ACL()
     album = Album()

tests/test_query.py

@@ -169,6 +169,9 @@ def test_basic_query(): # type: () -> None
     # get
     GameScore.query.get(game_score.id)
 
+    # get nonexist
+    assert GameScore.query.get("NonexistentID").is_existed() is False
+
     # count
     eq_(GameScore.query.count(), 10)