Python pipes.STDIN_STDOUT Examples

The following are 30 code examples of pipes.STDIN_STDOUT(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module pipes , or try the search function .
Example #1
Source File: test_pipes.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def testClone(self):
        t = pipes.Template()
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)

        u = t.clone()
        self.assertNotEqual(id(t), id(u))
        self.assertEqual(t.steps, u.steps)
        self.assertNotEqual(id(t.steps), id(u.steps))
        self.assertEqual(t.debugging, u.debugging)
Example #2
Source File: test_pipes.py    From ironpython3 with Apache License 2.0 5 votes vote down vote up 
def testBadPrependOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.prepend, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.prepend, 'tr a-z A-Z', 'xx')

        # shouldn't be able to prepend a sink
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SINK)

        # check prepending two sources
        t = pipes.Template()
        t.prepend('boguscmd', pipes.SOURCE)
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SOURCE)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #3
Source File: test_pipes.py    From ironpython3 with Apache License 2.0 5 votes vote down vote up 
def testClone(self):
        t = pipes.Template()
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)

        u = t.clone()
        self.assertNotEqual(id(t), id(u))
        self.assertEqual(t.steps, u.steps)
        self.assertNotEqual(id(t.steps), id(u.steps))
        self.assertEqual(t.debugging, u.debugging)
Example #4
Source File: test_pipes.py    From gcblue with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def testSimplePipe1(self):
        t = pipes.Template()
        t.append(s_command, pipes.STDIN_STDOUT)
        f = t.open(TESTFN, 'w')
        f.write('hello world #1')
        f.close()
        with open(TESTFN) as f:
            self.assertEqual(f.read(), 'HELLO WORLD #1')
Example #5
Source File: test_pipes.py    From gcblue with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def testRepr(self):
        t = pipes.Template()
        self.assertEqual(repr(t), "<Template instance, steps=[]>")
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)
        self.assertEqual(repr(t),
                    "<Template instance, steps=[('tr a-z A-Z', '--')]>")
Example #6
Source File: test_pipes.py    From gcblue with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def testBadAppendOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.append, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.append, 'boguscmd', 'xx')

        # shouldn't be able to append a source
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SOURCE)

        # check appending two sinks
        t = pipes.Template()
        t.append('boguscmd', pipes.SINK)
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SINK)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #7
Source File: test_pipes.py    From gcblue with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def testBadPrependOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.prepend, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.prepend, 'tr a-z A-Z', 'xx')

        # shouldn't be able to prepend a sink
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SINK)

        # check prepending two sources
        t = pipes.Template()
        t.prepend('boguscmd', pipes.SOURCE)
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SOURCE)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #8
Source File: test_pipes.py    From gcblue with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def testClone(self):
        t = pipes.Template()
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)

        u = t.clone()
        self.assertNotEqual(id(t), id(u))
        self.assertEqual(t.steps, u.steps)
        self.assertNotEqual(id(t.steps), id(u.steps))
        self.assertEqual(t.debugging, u.debugging)
Example #9
Source File: test_pipes.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def testSimplePipe1(self):
        t = pipes.Template()
        t.append(s_command, pipes.STDIN_STDOUT)
        f = t.open(TESTFN, 'w')
        f.write('hello world #1')
        f.close()
        with open(TESTFN) as f:
            self.assertEqual(f.read(), 'HELLO WORLD #1')
Example #10
Source File: test_pipes.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def testRepr(self):
        t = pipes.Template()
        self.assertEqual(repr(t), "<Template instance, steps=[]>")
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)
        self.assertEqual(repr(t),
                    "<Template instance, steps=[('tr a-z A-Z', '--')]>")
Example #11
Source File: test_pipes.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def testBadAppendOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.append, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.append, 'boguscmd', 'xx')

        # shouldn't be able to append a source
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SOURCE)

        # check appending two sinks
        t = pipes.Template()
        t.append('boguscmd', pipes.SINK)
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SINK)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #12
Source File: test_pipes.py    From Project-New-Reign---Nemesis-Main with GNU General Public License v3.0 5 votes vote down vote up 
def testBadPrependOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.prepend, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.prepend, 'tr a-z A-Z', 'xx')

        # shouldn't be able to prepend a sink
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SINK)

        # check prepending two sources
        t = pipes.Template()
        t.prepend('boguscmd', pipes.SOURCE)
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SOURCE)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #13
Source File: test_pipes.py    From ironpython3 with Apache License 2.0 5 votes vote down vote up 
def testBadAppendOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.append, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.append, 'boguscmd', 'xx')

        # shouldn't be able to append a source
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SOURCE)

        # check appending two sinks
        t = pipes.Template()
        t.append('boguscmd', pipes.SINK)
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SINK)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #14
Source File: test_pipes.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def testSimplePipe1(self):
        t = pipes.Template()
        t.append(s_command, pipes.STDIN_STDOUT)
        f = t.open(TESTFN, 'w')
        f.write('hello world #1')
        f.close()
        with open(TESTFN) as f:
            self.assertEqual(f.read(), 'HELLO WORLD #1')
Example #15
Source File: test_pipes.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def testRepr(self):
        t = pipes.Template()
        self.assertEqual(repr(t), "<Template instance, steps=[]>")
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)
        self.assertEqual(repr(t),
                    "<Template instance, steps=[('tr a-z A-Z', '--')]>")
Example #16
Source File: test_pipes.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def testBadAppendOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.append, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.append, 'boguscmd', 'xx')

        # shouldn't be able to append a source
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SOURCE)

        # check appending two sinks
        t = pipes.Template()
        t.append('boguscmd', pipes.SINK)
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SINK)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #17
Source File: test_pipes.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def testBadPrependOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.prepend, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.prepend, 'tr a-z A-Z', 'xx')

        # shouldn't be able to prepend a sink
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SINK)

        # check prepending two sources
        t = pipes.Template()
        t.prepend('boguscmd', pipes.SOURCE)
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SOURCE)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #18
Source File: test_pipes.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def testClone(self):
        t = pipes.Template()
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)

        u = t.clone()
        self.assertNotEqual(id(t), id(u))
        self.assertEqual(t.steps, u.steps)
        self.assertNotEqual(id(t.steps), id(u.steps))
        self.assertEqual(t.debugging, u.debugging)
Example #19
Source File: test_pipes.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def testSimplePipe1(self):
        t = pipes.Template()
        t.append(s_command, pipes.STDIN_STDOUT)
        f = t.open(TESTFN, 'w')
        f.write('hello world #1')
        f.close()
        with open(TESTFN) as f:
            self.assertEqual(f.read(), 'HELLO WORLD #1')
Example #20
Source File: test_pipes.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def testRepr(self):
        t = pipes.Template()
        self.assertEqual(repr(t), "<Template instance, steps=[]>")
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)
        self.assertEqual(repr(t),
                    "<Template instance, steps=[('tr a-z A-Z', '--')]>")
Example #21
Source File: test_pipes.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def testBadAppendOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.append, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.append, 'boguscmd', 'xx')

        # shouldn't be able to append a source
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SOURCE)

        # check appending two sinks
        t = pipes.Template()
        t.append('boguscmd', pipes.SINK)
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SINK)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #22
Source File: test_pipes.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def testBadPrependOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.prepend, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.prepend, 'tr a-z A-Z', 'xx')

        # shouldn't be able to prepend a sink
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SINK)

        # check prepending two sources
        t = pipes.Template()
        t.prepend('boguscmd', pipes.SOURCE)
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SOURCE)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #23
Source File: test_pipes.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def testClone(self):
        t = pipes.Template()
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)

        u = t.clone()
        self.assertNotEqual(id(t), id(u))
        self.assertEqual(t.steps, u.steps)
        self.assertNotEqual(id(t.steps), id(u.steps))
        self.assertEqual(t.debugging, u.debugging)
Example #24
Source File: test_pipes.py    From oss-ftp with MIT License 5 votes vote down vote up 
def testRepr(self):
        t = pipes.Template()
        self.assertEqual(repr(t), "<Template instance, steps=[]>")
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)
        self.assertEqual(repr(t),
                    "<Template instance, steps=[('tr a-z A-Z', '--')]>")
Example #25
Source File: test_pipes.py    From ironpython2 with Apache License 2.0 5 votes vote down vote up 
def testRepr(self):
        t = pipes.Template()
        self.assertEqual(repr(t), "<Template instance, steps=[]>")
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)
        self.assertEqual(repr(t),
                    "<Template instance, steps=[('tr a-z A-Z', '--')]>")
Example #26
Source File: test_pipes.py    From ironpython2 with Apache License 2.0 5 votes vote down vote up 
def testBadAppendOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.append, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.append, 'boguscmd', 'xx')

        # shouldn't be able to append a source
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SOURCE)

        # check appending two sinks
        t = pipes.Template()
        t.append('boguscmd', pipes.SINK)
        self.assertRaises(ValueError, t.append, 'boguscmd', pipes.SINK)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.append, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #27
Source File: test_pipes.py    From ironpython2 with Apache License 2.0 5 votes vote down vote up 
def testBadPrependOptions(self):
        t = pipes.Template()

        # try a non-string command
        self.assertRaises(TypeError, t.prepend, 7, pipes.STDIN_STDOUT)

        # try a type that isn't recognized
        self.assertRaises(ValueError, t.prepend, 'tr a-z A-Z', 'xx')

        # shouldn't be able to prepend a sink
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SINK)

        # check prepending two sources
        t = pipes.Template()
        t.prepend('boguscmd', pipes.SOURCE)
        self.assertRaises(ValueError, t.prepend, 'boguscmd', pipes.SOURCE)

        # command needing file input but with no $IN
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $OUT',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.FILEIN_STDOUT)

        # command needing file output but with no $OUT
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd $IN',
                           pipes.FILEIN_FILEOUT)
        t = pipes.Template()
        self.assertRaises(ValueError, t.prepend, 'boguscmd',
                           pipes.STDIN_FILEOUT)
Example #28
Source File: test_pipes.py    From ironpython2 with Apache License 2.0 5 votes vote down vote up 
def testClone(self):
        t = pipes.Template()
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)

        u = t.clone()
        self.assertNotEqual(id(t), id(u))
        self.assertEqual(t.steps, u.steps)
        self.assertNotEqual(id(t.steps), id(u.steps))
        self.assertEqual(t.debugging, u.debugging)
Example #29
Source File: test_pipes.py    From BinderFilter with MIT License 5 votes vote down vote up 
def testSimplePipe1(self):
        t = pipes.Template()
        t.append(s_command, pipes.STDIN_STDOUT)
        f = t.open(TESTFN, 'w')
        f.write('hello world #1')
        f.close()
        with open(TESTFN) as f:
            self.assertEqual(f.read(), 'HELLO WORLD #1')
Example #30
Source File: test_pipes.py    From BinderFilter with MIT License 5 votes vote down vote up 
def testRepr(self):
        t = pipes.Template()
        self.assertEqual(repr(t), "<Template instance, steps=[]>")
        t.append('tr a-z A-Z', pipes.STDIN_STDOUT)
        self.assertEqual(repr(t),
                    "<Template instance, steps=[('tr a-z A-Z', '--')]>")