def calculate_MTTR(path_to_git_repo, deploy_pattern, patch_pattern,
start_date):
run = mk_run(path_to_git_repo)
match_deploy = partial(fnmatch, pat=deploy_pattern)
match_patch = partial(fnmatch, pat=patch_pattern)
deploy_tags_author_date = fetch_tags_and_author_dates(
run,
match_deploy,
start_date,
)
deploy_tags_commit_date = dict(fetch_tags_and_sha(run, match_deploy))
patch_dates = set(date
for _tag, date in fetch_tags_and_sha(run, match_patch))
deployments = []
for deploy_tag, deploy_date in deploy_tags_author_date:
is_patch = find_is_patch(deploy_tag, deploy_tags_commit_date,
patch_dates)
deployments.append(Deployment(is_patch, deploy_date))
outages = find_outages(deployments)
downtime = (end.time - start.time for start, end in outages)
return statistics.mean(downtime)
def test_empty_tags_gives_empty_recoveries():
results = find_outages([])
assert results == []
def test_begin_with_patch():
results = find_outages([patch_one, deployment_two, patch_three])
assert results == [(deployment_two, patch_three)]
def test_two_outage_two_patches():
results = find_outages(
[deployment_zero, patch_one, deployment_two, patch_three])
assert results == [(deployment_zero, patch_one),
(deployment_two, patch_three)]
def test_one_outage_two_patches():
patch_two = Deployment(True, 2)
results = find_outages([deployment_zero, patch_one, patch_two])
assert results == [(deployment_zero, patch_two)]
def test_one_simple_outage():
results = find_outages([deployment_zero, patch_one])
assert results == [(deployment_zero, patch_one)]