[Add] skip some tests if module not built

tests/test_import_all.py

@@ -8,6 +8,13 @@ def check_env(key: str, default=None):
     return environ.get(key, default)
 
 
+def skip_if_module_not_built(env_key: str):
+    return unittest.skipIf(
+        check_env(key=env_key) == '0',
+        f"Skip because of {env_key}==0",
+    )
+
+
 # noinspection PyUnresolvedReferences,PyMethodMayBeStatic
 class CoreImportTest(unittest.TestCase):
 
@@ -34,6 +41,7 @@ def test_import_bitmex(self):
         from vnpy.gateway.bitmex import BitmexGateway
 
     @unittest.skipIf(platform.system() == "Darwin", "Not supported yet under osx")
+    @skip_if_module_not_built(env_key="VNPY_BUILD_CTP")
     def test_import_ctp(self):
         from vnpy.gateway.ctp import CtpGateway
 
@@ -60,7 +68,7 @@ def test_import_ib(self):
         from vnpy.gateway.ib import IbGateway
 
     @unittest.skipIf(platform.system() == "Darwin", "Not supported yet under osx")
-    @unittest.skipIf(check_env('VNPY_BUILD_OES') == '0', "Skip because of VNPY_BUILD_OES==0")
+    @skip_if_module_not_built(env_key="VNPY_BUILD_OES")
     def test_import_oes(self):
         from vnpy.gateway.oes import OesGateway