def testTripleFunctionWithIntermediateCleanup(self):
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('def triple(x):')
self.assertEqual(REPL.DEFAULT_PS2, repl.prompt)
repl.runCommandLine(' return int(x) * 3')
self.assertEqual(REPL.DEFAULT_PS2, repl.prompt)
repl.runCommandLine('')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('echo a b c | wc -w |')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
pl.toggleDebug()
repl.runCommandLine('ll = lambda x: x[0]')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('ll(_)')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('triple(_)')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
self.assertEqual(9, pl.stdin)
def testAttributes(self):
"""
A Batch instance must have the expected attributes.
"""
pl = Pipeline(loadInitFile=False)
batch = Batch(pl)
self.assertIs(pl, batch.pipeline)
def testAttributes(self):
"""
A REPL instance must have the expected attributes.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
self.assertIs(pl, repl.pipeline)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testSetPrompts(self):
"""
Setting the prompts via __init__ must work.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pipeline=pl, ps1='x', ps2='y')
self.assertEqual('x', repl.prompt)
self.assertEqual('x', sys.ps1)
self.assertEqual('y', sys.ps2)
def testEchoCatCat(self):
"""
We should be able to pipe echo output to cat twice.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('echo hi | cat | cat')
self.assertEqual(['hi'], pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testNumber(self):
"""
The REPL instance must be in the expected state after processing a
number.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('4')
self.assertAlmostEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testNumberPipeOneLine(self):
"""
The REPL instance must be in the expected state after processing a
command line containing a number followed by a pipe symbol.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('4 |')
self.assertAlmostEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testAddUnderscoreVar(self):
"""
We should be able to add to the _ variable even when not in
a pipeline.
"""
commands = StringIO('7\n_ + 10\n')
out = StringIO()
pl = Pipeline(loadInitFile=False, outfp=out)
Batch(pl).run(commands)
self.assertEqual('7\n17\n', out.getvalue())
def testToggleDebug(self):
"""
The REPL instance must be able to toggle the pipeline debug setting.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('%d')
self.assertIs(True, pl.debug)
repl.runCommandLine('%d')
self.assertIs(False, pl.debug)
def testIncompleteDict(self):
"""
The REPL instance must be in the expected state after processing a
an incomplete dict.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('{ "a": 6, "b": ')
# Is this next line correct? Should it be None?
self.assertIs(None, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS2, repl.prompt)
def testAddUnderscoreVar(self):
"""
We should be able to add to the _ variable even when not in
a pipeline.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('7')
repl.runCommandLine('_ + 10')
self.assertEqual(17, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testDictOnTwoLines(self):
"""
The REPL instance must be in the expected state after processing a
a dict given on two lines.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('{ "a": 6, "b": ')
repl.runCommandLine('7 }')
self.assertEqual({'a': 6, 'b': 7}, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testTripleFunction(self):
commands = StringIO('''
def triple(x):
return int(x) * 3
echo a b c | wc -w | triple(_[0])
''')
out = StringIO()
pl = Pipeline(loadInitFile=False, outfp=out)
Batch(pl).run(commands)
self.assertEqual('9\n', out.getvalue())
def testToggleTracebacks(self):
"""
The REPL instance must be able to toggle the printing of tracebacks.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('%t')
self.assertIs(True, pl.printTracebacks)
self.assertIs(True, pl.debug)
repl.runCommandLine('%t')
self.assertIs(False, pl.printTracebacks)
# Note that turning off traceback printing does not turn off debug.
self.assertIs(True, pl.debug)
def testAreaFunction(self):
"""Define an area function and call it."""
commands = StringIO('''
from math import pi
def area(r):
return r ** 2 * pi
area(2.0)
''')
out = StringIO()
pl = Pipeline(loadInitFile=False, outfp=out)
Batch(pl).run(commands)
self.assertTrue(out.getvalue().startswith('12.56637'))
def testNumberPipeTwoLines(self):
"""
The REPL instance must be in the expected state after processing a
command line containing a number and then a second command line with
just a pipe symbol.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('4')
self.assertFalse(pl.inPipeline)
self.assertEqual(4, pl.stdin)
repl.runCommandLine('')
self.assertEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testInitialWhitespaceCommands(self):
"""
We should be able to repeatedly enter whitespace commands in a new
session, while stdin remains as None and the prompt is unchanged.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine(' ')
self.assertEqual(None, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine(' \t ')
self.assertEqual(None, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testTripleFunctionWithIntermediateCleanup(self):
commands = StringIO('''
def triple(x):
return x * 3
echo a b c | wc -w
# Write a little function to convert the first line of _ to an int.
f = lambda line: int(line[0])
| f(_) | triple(_)
''')
out = StringIO()
pl = Pipeline(loadInitFile=False, outfp=out, usePtys=False)
Batch(pl).run(commands)
self.assertEqual('3\n9\n', out.getvalue())
def testInterpretingSection(self):
"""
Test the commands carried out in the 'How commands are interpreted'
section.
"""
commands = StringIO('''
4
_
[3, 6, 9]
print('hello')
echo hello too
''')
out = StringIO()
pl = Pipeline(loadInitFile=False, outfp=out)
Batch(pl).run(commands)
self.assertEqual('4\n4\n[3, 6, 9]\nhello\n', out.getvalue())
def testTripleFunction(self):
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('def triple(x):')
self.assertEqual(REPL.DEFAULT_PS2, repl.prompt)
repl.runCommandLine(' return int(x) * 3')
self.assertEqual(REPL.DEFAULT_PS2, repl.prompt)
repl.runCommandLine('')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('echo a b c | wc -w | triple(_[0])')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
self.assertEqual(9, pl.stdin)
def testWhitespaceCommands(self):
"""
We should be able to repeatedly enter whitespace commands without
changing the pending stdin value or the prompt.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('4')
self.assertEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine(' ')
self.assertEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('\t\t')
self.assertEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testEmptyCommands(self):
"""
We should be able to hit ENTER repeatedly without changing
the pending stdin value or the prompt.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('4')
self.assertEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('')
self.assertEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('')
self.assertEqual(4, pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testAreaFunction(self):
"""Define an area function and call it."""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('from math import pi')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('def area(r):')
self.assertEqual(REPL.DEFAULT_PS2, repl.prompt)
repl.runCommandLine(' return r ** 2 * pi')
self.assertEqual(REPL.DEFAULT_PS2, repl.prompt)
repl.runCommandLine('')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
repl.runCommandLine('area(2.0)')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
self.assertAlmostEqual(12.566370614359172, pl.stdin)
def testInterpretingSection(self):
"""
Test the commands carried out in the 'How commands are interpreted'
section.
"""
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('4')
self.assertEqual(4, pl.stdin)
repl.runCommandLine('_')
self.assertEqual(4, pl.stdin)
repl.runCommandLine('[3, 6, 9]')
self.assertEqual([3, 6, 9], pl.stdin)
repl.runCommandLine("print('hello')")
self.assertEqual('hello', pl.stdin)
repl.runCommandLine('echo hello too')
self.assertEqual(['hello too'], pl.stdin)
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
def testEchoPipedToWc(self):
commands = StringIO('echo a b c | wc -w')
out = StringIO()
pl = Pipeline(loadInitFile=False, outfp=out, usePtys=False)
Batch(pl).run(commands)
self.assertEqual('3\n', out.getvalue())
def testAbsArithmetic(self):
commands = StringIO('-6 | abs(_) | _ * 7')
out = StringIO()
pl = Pipeline(loadInitFile=False, outfp=out)
Batch(pl).run(commands)
self.assertEqual('42\n', out.getvalue())
def testAbsArithmetic(self):
pl = Pipeline(loadInitFile=False)
repl = REPL(pl)
repl.runCommandLine('-6 | abs(_) | _ * 7')
self.assertEqual(REPL.DEFAULT_PS1, repl.prompt)
self.assertEqual(42, pl.stdin)
def __init__(self, pipeline=None):
self.pipeline = pipeline or Pipeline()
def __init__(self, pipeline=None, ps1=DEFAULT_PS1, ps2=DEFAULT_PS2):
self.pipeline = pipeline or Pipeline()
sys.ps1 = self.prompt = ps1
sys.ps2 = ps2
