|
| 1 | + |
| 2 | +# Test case for the os.poll() function |
| 3 | + |
| 4 | +import sys, os, select, random |
| 5 | +from test.test_support import verbose, TestSkipped, TESTFN |
| 6 | + |
| 7 | +try: |
| 8 | + select.poll |
| 9 | +except AttributeError: |
| 10 | + raise TestSkipped, "select.poll not defined -- skipping test_poll" |
| 11 | + |
| 12 | + |
| 13 | +def find_ready_matching(ready, flag): |
| 14 | + match = [] |
| 15 | + for fd, mode in ready: |
| 16 | + if mode & flag: |
| 17 | + match.append(fd) |
| 18 | + return match |
| 19 | + |
| 20 | +def test_poll1(): |
| 21 | + """Basic functional test of poll object |
| 22 | +
|
| 23 | + Create a bunch of pipe and test that poll works with them. |
| 24 | + """ |
| 25 | + print 'Running poll test 1' |
| 26 | + p = select.poll() |
| 27 | + |
| 28 | + NUM_PIPES = 12 |
| 29 | + MSG = " This is a test." |
| 30 | + MSG_LEN = len(MSG) |
| 31 | + readers = [] |
| 32 | + writers = [] |
| 33 | + r2w = {} |
| 34 | + w2r = {} |
| 35 | + |
| 36 | + for i in range(NUM_PIPES): |
| 37 | + rd, wr = os.pipe() |
| 38 | + p.register(rd, select.POLLIN) |
| 39 | + p.register(wr, select.POLLOUT) |
| 40 | + readers.append(rd) |
| 41 | + writers.append(wr) |
| 42 | + r2w[rd] = wr |
| 43 | + w2r[wr] = rd |
| 44 | + |
| 45 | + while writers: |
| 46 | + ready = p.poll() |
| 47 | + ready_writers = find_ready_matching(ready, select.POLLOUT) |
| 48 | + if not ready_writers: |
| 49 | + raise RuntimeError, "no pipes ready for writing" |
| 50 | + wr = random.choice(ready_writers) |
| 51 | + os.write(wr, MSG) |
| 52 | + |
| 53 | + ready = p.poll() |
| 54 | + ready_readers = find_ready_matching(ready, select.POLLIN) |
| 55 | + if not ready_readers: |
| 56 | + raise RuntimeError, "no pipes ready for reading" |
| 57 | + rd = random.choice(ready_readers) |
| 58 | + buf = os.read(rd, MSG_LEN) |
| 59 | + assert len(buf) == MSG_LEN |
| 60 | + print buf |
| 61 | + os.close(r2w[rd]) |
| 62 | + writers.remove(r2w[rd]) |
| 63 | + |
| 64 | + poll_unit_tests() |
| 65 | + print 'Poll test 1 complete' |
| 66 | + |
| 67 | +def poll_unit_tests(): |
| 68 | + # returns NVAL for invalid file descriptor |
| 69 | + FD = 42 |
| 70 | + try: |
| 71 | + os.close(FD) |
| 72 | + except OSError: |
| 73 | + pass |
| 74 | + p = select.poll() |
| 75 | + p.register(FD) |
| 76 | + r = p.poll() |
| 77 | + assert r[0] == (FD, select.POLLNVAL) |
| 78 | + |
| 79 | + f = open(TESTFN, 'w') |
| 80 | + fd = f.fileno() |
| 81 | + p = select.poll() |
| 82 | + p.register(f) |
| 83 | + r = p.poll() |
| 84 | + assert r[0][0] == fd |
| 85 | + f.close() |
| 86 | + r = p.poll() |
| 87 | + assert r[0] == (fd, select.POLLNVAL) |
| 88 | + os.unlink(TESTFN) |
| 89 | + |
| 90 | + # type error for invalid arguments |
| 91 | + p = select.poll() |
| 92 | + try: |
| 93 | + p.register(p) |
| 94 | + except TypeError: |
| 95 | + pass |
| 96 | + else: |
| 97 | + print "Bogus register call did not raise TypeError" |
| 98 | + try: |
| 99 | + p.unregister(p) |
| 100 | + except TypeError: |
| 101 | + pass |
| 102 | + else: |
| 103 | + print "Bogus unregister call did not raise TypeError" |
| 104 | + |
| 105 | + # can't unregister non-existent object |
| 106 | + p = select.poll() |
| 107 | + try: |
| 108 | + p.unregister(3) |
| 109 | + except KeyError: |
| 110 | + pass |
| 111 | + else: |
| 112 | + print "Bogus unregister call did not raise KeyError" |
| 113 | + |
| 114 | + # Test error cases |
| 115 | + pollster = select.poll() |
| 116 | + class Nope: |
| 117 | + pass |
| 118 | + |
| 119 | + class Almost: |
| 120 | + def fileno(self): |
| 121 | + return 'fileno' |
| 122 | + |
| 123 | + try: |
| 124 | + pollster.register( Nope(), 0 ) |
| 125 | + except TypeError: pass |
| 126 | + else: print 'expected TypeError exception, not raised' |
| 127 | + |
| 128 | + try: |
| 129 | + pollster.register( Almost(), 0 ) |
| 130 | + except TypeError: pass |
| 131 | + else: print 'expected TypeError exception, not raised' |
| 132 | + |
| 133 | + |
| 134 | +# Another test case for poll(). This is copied from the test case for |
| 135 | +# select(), modified to use poll() instead. |
| 136 | + |
| 137 | +def test_poll2(): |
| 138 | + print 'Running poll test 2' |
| 139 | + cmd = 'for i in 0 1 2 3 4 5 6 7 8 9; do echo testing...; sleep 1; done' |
| 140 | + p = os.popen(cmd, 'r') |
| 141 | + pollster = select.poll() |
| 142 | + pollster.register( p, select.POLLIN ) |
| 143 | + for tout in (0, 1000, 2000, 4000, 8000, 16000) + (-1,)*10: |
| 144 | + if verbose: |
| 145 | + print 'timeout =', tout |
| 146 | + fdlist = pollster.poll(tout) |
| 147 | + if (fdlist == []): |
| 148 | + continue |
| 149 | + if fdlist[0] == (p.fileno(),select.POLLHUP): |
| 150 | + line = p.readline() |
| 151 | + if line != "": |
| 152 | + print 'error: pipe seems to be closed, but still returns data' |
| 153 | + continue |
| 154 | + |
| 155 | + elif fdlist[0] == (p.fileno(),select.POLLIN): |
| 156 | + line = p.readline() |
| 157 | + if verbose: |
| 158 | + print `line` |
| 159 | + if not line: |
| 160 | + if verbose: |
| 161 | + print 'EOF' |
| 162 | + break |
| 163 | + continue |
| 164 | + else: |
| 165 | + print 'Unexpected return value from select.poll:', fdlist |
| 166 | + p.close() |
| 167 | + print 'Poll test 2 complete' |
| 168 | + |
| 169 | +test_poll1() |
| 170 | +test_poll2() |
| 171 | + |
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