Start of a test suite for the "os" module -- this only tests the temporary

file management functions that have just been made available on more
platforms.

Lib/test/test_os.py

+# As a test suite for the os module, this is woefully inadequate, but this
+# does add tests for a few functions which have been determined to be more
+# more portable than they had been thought to be.
+
+import os
+import unittest
+
+from test_support import TESTFN, run_unittest
+
+
+class TemporaryFileTests(unittest.TestCase):
+    def setUp(self):
+        self.files = []
+        os.mkdir(TESTFN)
+
+    def tearDown(self):
+        for name in self.files:
+            os.unlink(name)
+        os.rmdir(TESTFN)
+
+    def check_tempfile(self, name):
+        # make sure it doesn't already exist:
+        self.failIf(os.path.exists(name),
+                    "file already exists for temporary file")
+        # make sure we can create the file
+        open(name, "w")
+        self.files.append(name)
+
+    def test_tempnam(self):
+        if not hasattr(os, "tempnam"):
+            return
+        self.check_tempfile(os.tempnam())
+
+        name = os.tempnam(TESTFN)
+        self.assert_(os.path.dirname(name) == TESTFN)
+        self.check_tempfile(name)
+
+        name = os.tempnam(TESTFN, "pfx")
+        self.assert_(os.path.dirname(name) == TESTFN)
+        self.assert_(os.path.basename(name)[:3] == "pfx")
+        self.check_tempfile(name)
+
+    def test_tmpfile(self):
+        if not hasattr(os, "tmpfile"):
+            return
+        fp = os.tmpfile()
+        fp.write("foobar")
+        fp.seek(0,0)
+        s = fp.read()
+        fp.close()
+        self.assert_(s == "foobar")
+
+    def test_tmpnam(self):
+        if not hasattr(os, "tmpnam"):
+            return
+        self.check_tempfile(os.tmpnam())
+        
+
+
+run_unittest(TemporaryFileTests)