Change tests to use tempfile

test/test_serialization.py

@@ -3,6 +3,7 @@ import capnp
 import os
 import platform
 import test_regression
+import tempfile
 
 this_dir = os.path.dirname(__file__)
 
@@ -11,22 +12,22 @@ def all_types():
     return capnp.load(os.path.join(this_dir, 'all_types.capnp'))
 
 def test_roundtrip_file(all_types):
-    f = open('example', 'w')
+    f = tempfile.TemporaryFile()
     msg = all_types.TestAllTypes.new_message()
     test_regression.init_all_types(msg)
     msg.write(f)
 
-    f = open('example', 'r')
+    f.seek(0)
     msg = all_types.TestAllTypes.read(f)
     test_regression.check_all_types(msg)
 
 def test_roundtrip_file_packed(all_types):
-    f = open('example', 'w')
+    f = tempfile.TemporaryFile()
     msg = all_types.TestAllTypes.new_message()
     test_regression.init_all_types(msg)
     msg.write_packed(f)
 
-    f = open('example', 'r')
+    f.seek(0)
     msg = all_types.TestAllTypes.read_packed(f)
     test_regression.check_all_types(msg)
 
@@ -47,26 +48,26 @@ def test_roundtrip_bytes_packed(all_types):
     test_regression.check_all_types(msg)
 
 def test_roundtrip_file_multiple(all_types):
-    f = open('example', 'w')
+    f = tempfile.TemporaryFile()
     msg = all_types.TestAllTypes.new_message()
     test_regression.init_all_types(msg)
     msg.write(f)
     msg.write(f)
     msg.write(f)
 
-    f = open('example', 'r')
+    f.seek(0)
     for msg in all_types.TestAllTypes.read_multiple(f):
         test_regression.check_all_types(msg)
 
 def test_roundtrip_file_multiple_packed(all_types):
-    f = open('example', 'w')
+    f = tempfile.TemporaryFile()
     msg = all_types.TestAllTypes.new_message()
     test_regression.init_all_types(msg)
     msg.write_packed(f)
     msg.write_packed(f)
     msg.write_packed(f)
 
-    f = open('example', 'r')
+    f.seek(0)
     for msg in all_types.TestAllTypes.read_multiple_packed(f):
         test_regression.check_all_types(msg)
 
@@ -79,23 +80,21 @@ def test_roundtrip_dict(all_types):
     test_regression.check_all_types(msg)
 
 def test_file_and_bytes(all_types):
-    f = open('example', 'w')
+    f = tempfile.TemporaryFile()
     msg = all_types.TestAllTypes.new_message()
     test_regression.init_all_types(msg)
     msg.write(f)
-    f.close()
 
-    f = open('example', 'r')
+    f.seek(0)
 
     assert f.read() == msg.to_bytes()
 
 def test_file_and_bytes_packed(all_types):
-    f = open('example', 'w')
+    f = tempfile.TemporaryFile()
     msg = all_types.TestAllTypes.new_message()
     test_regression.init_all_types(msg)
     msg.write_packed(f)
-    f.close()
 
-    f = open('example', 'r')
+    f.seek(0)
 
     assert f.read() == msg.to_bytes_packed()

test/test_struct.py

@@ -1,6 +1,7 @@
 import pytest
 import capnp
 import os
+import tempfile
 
 this_dir = os.path.dirname(__file__)
 
@@ -44,9 +45,9 @@ def test_which_reader(addressbook):
 
         capnp._write_packed_message_to_fd(fd, message)
 
-    f = open('example', 'w')
+    f = tempfile.TemporaryFile()
     writeAddressBook(f.fileno())
-    f = open('example', 'r')
+    f.seek(0)
 
     addresses = addressbook.AddressBook.read_packed(f)