diff --git a/studyPyTest/conftest.py b/studyPyTest/conftest.py
index 4a39b99..89fcbd6 100644
--- a/studyPyTest/conftest.py
+++ b/studyPyTest/conftest.py
@@ -4,7 +4,7 @@
 # @Author  : gonghuihui
 # @File    : conftest.py
 import pytest
-
+import smtplib
 # content of conftest.py
 
 """
@@ -19,9 +19,8 @@ def image_file(tmpdir_factory):
 def test_histogram(image_file):
     img = load_image(image_file)
     # compute and test histogram
-"""
 
-"""
+
 def test_func_fact():
     print("fast")
 
@@ -32,10 +31,21 @@ def test_func_slow_1():
 @pytest.mark.xfail(not pytest.config.getoption("--runslow"))
 def test_func_slow_2():
     print("xfail slow")
-"""
 
+"""
 from test_foocompare import Foo
 def pytest_assertrepr_compare(op, left, right):
-    if isinstance(left, Foo) and isinstance(left, Foo) and op == "==":
+    if isinstance(left, Foo) and isinstance(right, Foo) and op == "==":
         return ['Comparing Foo instance:',
                 '    vals: %s != %s' %(left.val, right)]
+
+
+# content of test_module
+@pytest.fixture(scope="module")
+def smtp(request):
+    server = getattr(request.module, "smtpserver", "smtp.mail.com")
+    smtp = smtplib.SMTP("smtp.gmail.com", 587, timeout=5)
+    yield smtp
+    print("finalizing %s (%s)" %(smtp, server))
+    smtp.close()
+
diff --git a/studyPyTest/test_anothersmtp.py b/studyPyTest/test_anothersmtp.py
new file mode 100644
index 0000000..86ff55a
--- /dev/null
+++ b/studyPyTest/test_anothersmtp.py
@@ -0,0 +1,9 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Time    : 17-12-21 下午11:29
+# @Author  : gonghuihui
+# @File    : test_anothersmtp.py
+
+smtpserver = "mail.python.org"
+def test_showhelo(smtp):
+    assert 0,smtp.helo()
\ No newline at end of file
diff --git a/studyPyTest/test_module.py b/studyPyTest/test_module.py
new file mode 100644
index 0000000..97852d0
--- /dev/null
+++ b/studyPyTest/test_module.py
@@ -0,0 +1,15 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Time    : 17-12-20 下午11:59
+# @Author  : gonghuihui
+# @File    : test_module.py
+def test_ehlo(smtp):
+    respone, msg = smtp.ehlo()
+    assert respone == 250
+    assert b"smtp.gmail.com" in msg
+    assert 0  #for demo purpose  啥意思
+
+def test_noop(smtp):
+    respone, msg = smtp.ehlo()
+    assert respone == 250
+    assert 0 #for demo purpose
\ No newline at end of file
diff --git a/studyPyTest/test_smtpsimple.py b/studyPyTest/test_smtpsimple.py
new file mode 100644
index 0000000..5e52000
--- /dev/null
+++ b/studyPyTest/test_smtpsimple.py
@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Time    : 17-12-20 下午10:46
+# @Author  : gonghuihui
+# @File    : test_smtpsimple.py
+import pytest
+
+@pytest.fixture()
+def smtp():
+    import smtplib
+    return smtplib.SMTP("smtp.gmail.com", 587, timeout=10)
+
+def test_ehlo(smtp):
+    response, msg = smtp.ehlo()
+    assert response == 250
+    assert 0
+# 总是超时，为啥子嘞
\ No newline at end of file
diff --git a/studyPyTest/test_yield2.py b/studyPyTest/test_yield2.py
new file mode 100644
index 0000000..d572caa
--- /dev/null
+++ b/studyPyTest/test_yield2.py
@@ -0,0 +1,12 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @Time    : 17-12-21 下午10:48
+# @Author  : gonghuihui
+# @File    : test_yield2.py
+import pytest
+import smtplib
+
+@pytest.fixture(scope="module")
+def smtp():
+    with smtplib.SMTP("smtp.gmail.com", 587, timeout=5) as smtp:
+        yield smtp  #provide the fixture value