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Step implementations
====================
This chapter contains implementations of each step. See the [yarn]
manual for details and examples.
Running distix
--------------
We need a way for the steps to run distix with various command line
arguments. Instead of having a different IMPLEMENTS step for each
command that needs to be run, we'll have one fairly generic one. It'll
allow the step to provide the command line arguments, but then also
adds in options and things to make distix be isolated from, say,
global configuration etc.
User needs to change directory. Since each step is run in a new shell,
we do this by keeping track ourselves of where the scenario wants to
be, and changing there when running various commands.
IMPLEMENTS WHEN user changes working directory to (\S+)
newdir = get_next_match()
olddir = vars['cwd'] or '.'
vars['cwd'] = os.path.abspath(os.path.join(datadir, olddir, newdir))
print os.listdir('.')
runcmd(['pwd'], cwd=vars['cwd'])
IMPLEMENTS WHEN user attempts to run distix ([^$]*)
args = get_next_match()
configure_git()
run_distix(args.split())
IMPLEMENTS WHEN user attempts to run distix show \$PREFIX
configure_git()
run_distix(['show', vars['tid-prefix']])
IMPLEMENTS WHEN user sets all tickets in (\S+) to (\S+)
repo = get_next_match()
keyvalue = get_next_match()
run_distix(['list'], cwd=repo)
list_output = vars['stdout']
tickets = [
line.split()[1]
for line in list_output.splitlines()
if line.startswith(' ')
]
run_distix(['set', keyvalue] + tickets)
We also need steps for inspecting the results of attempting to run
distix.
IMPLEMENTS THEN attempt succeeded
print 'stdout:', repr(vars['stdout'])
print 'stderr:', repr(vars['stderr'])
print 'exit:', vars['exit']
assert vars['exit'] == 0
IMPLEMENTS THEN output is "(.*)"
wanted = unescape(get_next_match())
output = vars['stdout']
print 'wanted:', repr(wanted)
print 'output:', repr(output)
assert wanted == unescape(vars['stdout'])
IMPLEMENTS THEN output matches "(.*)"
import re
pattern = get_next_match().decode('utf8')
print 'stdout:', repr(vars['stdout'])
print 'pattern:', repr(pattern)
assert re.search(pattern, vars['stdout'], re.M) is not None
IMPLEMENTS THEN output doesn't match "(.*)"
import re
pattern = get_next_match()
output = unicode(vars['stdout'], 'utf8')
print 'pattern:', repr(pattern)
print 'stdout:', repr(output)
assert re.search(pattern, output) is None
IMPLEMENTS THEN first ticket id is captured as \$TID
# We assume previous command run was distix list.
list_output = vars['stdout']
tickets = [
line.split()[1]
for line in list_output.splitlines()
if line.startswith(' ')
]
vars['tickets'] = tickets
vars['ticket-id-1'] = tickets[0]
IMPLEMENTS THEN attempt failed
assert vars['exit'] != 0
IMPLEMENTS THEN error message matches (.*)
import re
pattern = get_next_match()
assert re.search(pattern, vars['stderr']) is not None
File creation
-------------
We need to provide a way for scenarios to create files with known
content.
IMPLEMENTS GIVEN file (\S+) containing "(.*)"
filename = get_next_match()
content = get_next_match()
write_file(filename, unescape(content).encode('utf8'))
Maildir creation
----------------
We need to create a maildir with mails in it.
IMPLEMENTS GIVEN maildir (\S+) containing a mail with subject "(.+)"
dirname = get_next_match()
subject = get_next_match()
mkmaildir(dirname)
mailfile = os.path.join(dirname, 'new', 'msg')
write_file(mailfile, """\
From: user@example.com
Subject: {subject}
Message body goes here.
""".format(subject=subject).encode('utf8'))
File tests
-----------
Does a file or directory exist?
IMPLEMENTS THEN (\S+) exists
filename = get_next_match()
assert os.path.exists(filename)
Repository/ticket tests
-----------------------
How many tickets does a repository have?
IMPLEMENTS THEN repository (\S+) has (\d+) tickets?
repo = get_next_match()
count = int(get_next_match())
ticketdir = os.path.join(repo, 'tickets')
assert len(os.listdir(ticketdir)) == count
How many copies of a given message does a repository have? In any
tickets?
IMPLEMENTS THEN repository (\S+) has one copy of message in (\S+)
repo = get_next_match()
msgfile = get_next_match()
msg = cat_file(msgfile)
tickets = os.path.join(repo, 'tickets')
for dirname, subdirs, basenames in os.walk(repo):
for basename in basenames:
filename = os.path.join(dirname, basename)
candidate = cat_file(filename)
if candidate == msg:
sys.exit(0)
sys.exit(1)
Git operations
--------------
Clone a repository.
IMPLEMENTS WHEN user clones (\S+) to (\S+)
url = get_next_match()
dirname = get_next_match()
print repr(vars['cwd'])
print repr(vars._dict)
print runcmd(['pwd'])
print os.listdir('.')
print os.listdir(url)
print repr(['git', 'clone', url, dirname])
print runcmd(['git', 'clone', url, dirname])
print runcmd(['pwd'], cwd=dirname)
Check that everything is in git.
IMPLEMENTS THEN everything in (\S+) is committed to git
ex, out, err = runcmd(['git', 'status', '--short'])
print 'stdout:', repr(out)
assert out == ''
Ticket id manipulation
----------------------
IMPLEMENTS THEN ticket id \$TID 7-nybble prefix is \$PREFIX
vars['tid-prefix'] = vars['ticket-id-1'][:7]
IMPLEMENTS THEN output contains ticket id \$TID
assert vars['ticket-id-1'] in vars['stdout']
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