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import re
from funcy.debug import *
from funcy.flow import silent
from funcy.seqs import lmap
def test_tap():
assert capture(tap, 42) == '42\n'
assert capture(tap, 42, label='Life and ...') == 'Life and ...: 42\n'
def test_log_calls():
log = []
@log_calls(log.append)
def f(x, y):
return x + y
f(1, 2)
f('a', 'b')
assert log == [
"Call f(1, 2)",
"-> 3 from f(1, 2)",
"Call f('a', 'b')",
"-> 'ab' from f('a', 'b')",
]
def test_print_calls():
def f(x, y):
return x + y
capture(print_calls(f), 1, 2) == "Call f(1, 2)\n-> 3 from f(1, 2)\n",
capture(print_calls()(f), 1, 2) == "Call f(1, 2)\n-> 3 from f(1, 2)\n",
def test_log_calls_raise():
log = []
@log_calls(log.append, stack=False)
def f():
raise Exception('something bad')
silent(f)()
assert log == [
"Call f()",
"-> Exception: something bad raised in f()",
]
def test_log_errors():
log = []
@log_errors(log.append)
def f(x):
return 1 / x
silent(f)(1)
silent(f)(0)
assert len(log) == 1
assert log[0].startswith('Traceback')
assert re.search(r'ZeroDivisionError: .*\n raised in f\(0\)$', log[0])
def test_log_errors_manager():
log = []
try:
with log_errors(log.append):
1 / 0
except ZeroDivisionError:
pass
try:
with log_errors(log.append, 'name check', stack=False):
hey
except NameError:
pass
assert len(log) == 2
print(log)
assert log[0].startswith('Traceback')
assert re.search(r'ZeroDivisionError: .* zero\s*$', log[0])
assert not log[1].startswith('Traceback')
assert re.search(r"NameError: (global )?name 'hey' is not defined raised in name check", log[1])
def test_print_errors():
def error():
1 / 0
f = print_errors(error)
assert f.__name__ == 'error'
assert 'ZeroDivisionError' in capture(silent(f))
g = print_errors(stack=False)(error)
assert g.__name__ == 'error'
assert capture(silent(g)).startswith('ZeroDivisionError')
def test_print_errors_manager():
@silent
def f():
with print_errors:
1 / 0
assert 'ZeroDivisionError' in capture(f)
assert capture(f).startswith('Traceback')
def test_print_errors_recursion():
@silent
@print_errors(stack=False)
def f(n):
if n:
f(0)
1 / 0
assert 'f(1)' in capture(f, 1)
def test_log_durations(monkeypatch):
timestamps = iter([0, 0.01, 1, 1.000025])
monkeypatch.setattr('funcy.debug.timer', lambda: next(timestamps))
log = []
f = log_durations(log.append)(lambda: None)
f()
with log_durations(log.append, 'hello'):
pass
assert lmap(r'^\s*(\d+\.\d+ mk?s) in (?:<lambda>\(\)|hello)$', log) == ['10.00 ms', '25.00 mks']
def test_log_durations_ex(monkeypatch):
timestamps = [0, 0.01, 1, 1.001, 2, 2.02]
timestamps_iter = iter(timestamps)
monkeypatch.setattr('funcy.debug.timer', lambda: next(timestamps_iter))
log = []
f = log_durations(log.append, unit='ms', threshold=1.1e-3)(lambda: None)
f(); f(); f()
assert len(log) == 2
assert lmap(r'^\s*(\d+\.\d+) ms in', log) == ['10.00', '20.00']
def test_log_iter_dirations():
log = []
for item in log_iter_durations([1, 2], log.append):
pass
assert len(log) == 2
### An utility to capture stdout
import sys
try:
from cStringIO import StringIO
except ImportError:
from io import StringIO
def capture(command, *args, **kwargs):
out, sys.stdout = sys.stdout, StringIO()
try:
command(*args, **kwargs)
sys.stdout.seek(0)
return sys.stdout.read()
finally:
sys.stdout = out
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