Convert test_poll to unittest.

Lib/test/output/test_poll

-test_poll
-Running poll test 1
- This is a test.
- This is a test.
- This is a test.
- This is a test.
- This is a test.
- This is a test.
- This is a test.
- This is a test.
- This is a test.
- This is a test.
- This is a test.
- This is a test.
-Poll test 1 complete
-Running poll test 2
-Poll test 2 complete
-Running poll test 3
-Poll test 3 complete

Lib/test/test_poll.py

 # Test case for the os.poll() function
 
-import sys, os, select, random
-from test.test_support import verify, verbose, TestSkipped, TESTFN
+import sys, os, select, random, unittest
+from test.test_support import TestSkipped, TESTFN, run_unittest
 
 try:
     select.poll
@@ -16,177 +16,141 @@ def find_ready_matching(ready, flag):
             match.append(fd)
     return match
 
-def test_poll1():
-    """Basic functional test of poll object
-
-    Create a bunch of pipe and test that poll works with them.
-    """
-    print 'Running poll test 1'
-    p = select.poll()
-
-    NUM_PIPES = 12
-    MSG = " This is a test."
-    MSG_LEN = len(MSG)
-    readers = []
-    writers = []
-    r2w = {}
-    w2r = {}
-
-    for i in range(NUM_PIPES):
-        rd, wr = os.pipe()
-        p.register(rd, select.POLLIN)
-        p.register(wr, select.POLLOUT)
-        readers.append(rd)
-        writers.append(wr)
-        r2w[rd] = wr
-        w2r[wr] = rd
-
-    while writers:
-        ready = p.poll()
-        ready_writers = find_ready_matching(ready, select.POLLOUT)
-        if not ready_writers:
-            raise RuntimeError, "no pipes ready for writing"
-        wr = random.choice(ready_writers)
-        os.write(wr, MSG)
-
-        ready = p.poll()
-        ready_readers = find_ready_matching(ready, select.POLLIN)
-        if not ready_readers:
-            raise RuntimeError, "no pipes ready for reading"
-        rd = random.choice(ready_readers)
-        buf = os.read(rd, MSG_LEN)
-        verify(len(buf) == MSG_LEN)
-        print buf
-        os.close(r2w[rd]) ; os.close( rd )
-        p.unregister( r2w[rd] )
-        p.unregister( rd )
-        writers.remove(r2w[rd])
-
-    poll_unit_tests()
-    print 'Poll test 1 complete'
-
-def poll_unit_tests():
-    # returns NVAL for invalid file descriptor
-    FD = 42
-    try:
-        os.close(FD)
-    except OSError:
-        pass
-    p = select.poll()
-    p.register(FD)
-    r = p.poll()
-    verify(r[0] == (FD, select.POLLNVAL))
-
-    f = open(TESTFN, 'w')
-    fd = f.fileno()
-    p = select.poll()
-    p.register(f)
-    r = p.poll()
-    verify(r[0][0] == fd)
-    f.close()
-    r = p.poll()
-    verify(r[0] == (fd, select.POLLNVAL))
-    os.unlink(TESTFN)
-
-    # type error for invalid arguments
-    p = select.poll()
-    try:
-        p.register(p)
-    except TypeError:
-        pass
-    else:
-        print "Bogus register call did not raise TypeError"
-    try:
-        p.unregister(p)
-    except TypeError:
-        pass
-    else:
-        print "Bogus unregister call did not raise TypeError"
-
-    # can't unregister non-existent object
-    p = select.poll()
-    try:
-        p.unregister(3)
-    except KeyError:
-        pass
-    else:
-        print "Bogus unregister call did not raise KeyError"
-
-    # Test error cases
-    pollster = select.poll()
-    class Nope:
-        pass
-
-    class Almost:
-        def fileno(self):
-            return 'fileno'
-
-    try:
-        pollster.register( Nope(), 0 )
-    except TypeError: pass
-    else: print 'expected TypeError exception, not raised'
-
-    try:
-        pollster.register( Almost(), 0 )
-    except TypeError: pass
-    else: print 'expected TypeError exception, not raised'
-
-
-# Another test case for poll().  This is copied from the test case for
-# select(), modified to use poll() instead.
-
-def test_poll2():
-    print 'Running poll test 2'
-    cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'
-    p = os.popen(cmd, 'r')
-    pollster = select.poll()
-    pollster.register( p, select.POLLIN )
-    for tout in (0, 1000, 2000, 4000, 8000, 16000) + (-1,)*10:
-        if verbose:
-            print 'timeout =', tout
-        fdlist = pollster.poll(tout)
-        if (fdlist == []):
-            continue
-        fd, flags = fdlist[0]
-        if flags & select.POLLHUP:
-            line = p.readline()
-            if line != "":
-                print 'error: pipe seems to be closed, but still returns data'
-            continue
-
-        elif flags & select.POLLIN:
-            line = p.readline()
-            if verbose:
-                print repr(line)
-            if not line:
-                if verbose:
-                    print 'EOF'
-                break
-            continue
-        else:
-            print 'Unexpected return value from select.poll:', fdlist
-    p.close()
-    print 'Poll test 2 complete'
-
-def test_poll3():
-    # test int overflow
-    print 'Running poll test 3'
-    pollster = select.poll()
-    pollster.register(1)
-
-    try:
-        pollster.poll(1L << 64)
-    except OverflowError:
-        pass
-    else:
-        print 'Expected OverflowError with excessive timeout'
-
-    x = 2 + 3
-    if x != 5:
-        print 'Overflow must have occurred'
-    print 'Poll test 3 complete'
-
-
-test_poll1()
-test_poll2()
-test_poll3()
+class PollTests(unittest.TestCase):
+
+    def test_poll1(self):
+        # Basic functional test of poll object
+        # Create a bunch of pipe and test that poll works with them.
+        
+        p = select.poll()
+
+        NUM_PIPES = 12
+        MSG = " This is a test."
+        MSG_LEN = len(MSG)
+        readers = []
+        writers = []
+        r2w = {}
+        w2r = {}
+
+        for i in range(NUM_PIPES):
+            rd, wr = os.pipe()
+            p.register(rd, select.POLLIN)
+            p.register(wr, select.POLLOUT)
+            readers.append(rd)
+            writers.append(wr)
+            r2w[rd] = wr
+            w2r[wr] = rd
+
+        bufs = []
+
+        while writers:
+            ready = p.poll()
+            ready_writers = find_ready_matching(ready, select.POLLOUT)
+            if not ready_writers:
+                raise RuntimeError, "no pipes ready for writing"
+            wr = random.choice(ready_writers)
+            os.write(wr, MSG)
+
+            ready = p.poll()
+            ready_readers = find_ready_matching(ready, select.POLLIN)
+            if not ready_readers:
+                raise RuntimeError, "no pipes ready for reading"
+            rd = random.choice(ready_readers)
+            buf = os.read(rd, MSG_LEN)
+            self.assertEqual(len(buf), MSG_LEN)
+            bufs.append(buf)
+            os.close(r2w[rd]) ; os.close( rd )
+            p.unregister( r2w[rd] )
+            p.unregister( rd )
+            writers.remove(r2w[rd])
+
+        self.assertEqual(bufs, [MSG] * NUM_PIPES)
+
+    def poll_unit_tests(self):
+        # returns NVAL for invalid file descriptor
+        FD = 42
+        try:
+            os.close(FD)
+        except OSError:
+            pass
+        p = select.poll()
+        p.register(FD)
+        r = p.poll()
+        self.assertEqual(r[0], (FD, select.POLLNVAL))
+
+        f = open(TESTFN, 'w')
+        fd = f.fileno()
+        p = select.poll()
+        p.register(f)
+        r = p.poll()
+        self.assertEqual(r[0][0], fd)
+        f.close()
+        r = p.poll()
+        self.assertEqual(r[0], (fd, select.POLLNVAL))
+        os.unlink(TESTFN)
+
+        # type error for invalid arguments
+        p = select.poll()
+        self.assertRaises(TypeError, p.register, p)
+        self.assertRaises(TypeError, p.unregister, p)
+
+        # can't unregister non-existent object
+        p = select.poll()
+        self.assertRaises(KeyError, p.unregister, 3)
+
+        # Test error cases
+        pollster = select.poll()
+        class Nope:
+            pass
+
+        class Almost:
+            def fileno(self):
+                return 'fileno'
+
+        self.assertRaises(TypeError, pollster.register, Nope(), 0)
+        self.assertRaises(TypeError, pollster.register, Almost(), 0)
+
+    # Another test case for poll().  This is copied from the test case for
+    # select(), modified to use poll() instead.
+
+    def test_poll2(self):
+        cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done'
+        p = os.popen(cmd, 'r')
+        pollster = select.poll()
+        pollster.register( p, select.POLLIN )
+        for tout in (0, 1000, 2000, 4000, 8000, 16000) + (-1,)*10:
+            fdlist = pollster.poll(tout)
+            if (fdlist == []):
+                continue
+            fd, flags = fdlist[0]
+            if flags & select.POLLHUP:
+                line = p.readline()
+                if line != "":
+                    self.fail('error: pipe seems to be closed, but still returns data')
+                continue
+
+            elif flags & select.POLLIN:
+                line = p.readline()
+                if not line:
+                    break
+                continue
+            else:
+                self.fail('Unexpected return value from select.poll: %s' % fdlist)
+        p.close()
+
+    def test_poll3(self):
+        # test int overflow
+        pollster = select.poll()
+        pollster.register(1)
+
+        self.assertRaises(OverflowError, pollster.poll, 1L << 64)
+
+        x = 2 + 3
+        if x != 5:
+            self.fail('Overflow must have occurred')
+
+def test_main():
+    run_unittest(PollTests)
+
+if __name__ == '__main__':
+    test_main()