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# Library for JSTest manifests.
# This includes classes for representing and parsing JS manifests.
from __future__ import print_function
import io
import os
import posixpath
import re
import six
import sys
from subprocess import Popen, PIPE
from .remote import init_device
from .tests import RefTestCase
def split_path_into_dirs(path):
dirs = [path]
while True:
path, tail = os.path.split(path)
if not tail:
return dirs
class XULInfo:
def __init__(self, abi, os, isdebug):
self.abi = abi
self.os = os
self.isdebug = isdebug
self.browserIsRemote = False
def as_js(self):
"""Return JS that when executed sets up variables so that JS expression
predicates on XUL build info evaluate properly."""
return (
'var xulRuntime = {{ OS: "{}", XPCOMABI: "{}", shell: true }};'
"var release_or_beta = getBuildConfiguration().release_or_beta;"
"var isDebugBuild={}; var Android={}; "
"var browserIsRemote={}".format(
str(self.os == "Android").lower(),
def create(cls, jsdir):
"""Create a XULInfo based on the current platform's characteristics."""
# Our strategy is to find the generated for the build and
# read the values from there.
# Find config/
dirs = split_path_into_dirs(os.getcwd()) + split_path_into_dirs(jsdir)
path = None
for dir in dirs:
_path = posixpath.join(dir, "config", "")
if os.path.isfile(_path):
path = _path
if path is None:
"Can't find config/ on a directory containing"
" the JS shell (searched from {})".format(jsdir)
# Read the values.
val_re = re.compile(r"(TARGET_XPCOM_ABI|OS_TARGET|MOZ_DEBUG)\s*=\s*(.*)")
kw = {"isdebug": False}
for line in, encoding="utf-8"):
m = val_re.match(line)
if m:
key, val = m.groups()
val = val.rstrip()
if key == "TARGET_XPCOM_ABI":
kw["abi"] = val
if key == "OS_TARGET":
kw["os"] = val
if key == "MOZ_DEBUG":
kw["isdebug"] = val == "1"
return cls(**kw)
class XULInfoTester:
def __init__(self, xulinfo, options, js_args):
self.js_prologue = xulinfo.as_js()
self.js_bin = options.js_shell
self.js_args = js_args
# options here are the command line options
self.options = options
# Maps JS expr to evaluation result.
self.cache = {}
if not self.options.remote:
self.device = init_device(options)
self.js_bin = posixpath.join(options.remote_test_root, "bin", "js")
def test(self, cond, options=[]):
if self.options.remote:
return self._test_remote(cond, options=options)
return self._test_local(cond, options=options)
def _test_remote(self, cond, options=[]):
from mozdevice import ADBDevice, ADBProcessError
ans = self.cache.get(cond, None)
if ans is not None:
return ans
env = {
"LD_LIBRARY_PATH": posixpath.join(self.options.remote_test_root, "bin"),
cmd = (
+ self.js_args
+ options
+ [
# run in safe configuration, since it is hard to debug
# crashes when running code here. In particular, msan will
# error out if the jit is active.
cmd = ADBDevice._escape_command_line(cmd)
# Allow ADBError or ADBTimeoutError to terminate the test run,
# but handle ADBProcessError in order to support the use of
# non-zero exit codes in the JavaScript shell tests.
out = self.device.shell_output(
cmd, env=env, cwd=self.options.remote_test_root, timeout=None
err = ""
except ADBProcessError as e:
out = ""
err = str(e.adb_process.stdout)
if out == "true":
ans = True
elif out == "false":
ans = False
raise Exception(
"Failed to test XUL condition {!r};"
" output was {!r}, stderr was {!r}".format(cond, out, err)
self.cache[cond] = ans
return ans
def _test_local(self, cond, options=[]):
"""Test a XUL predicate condition against this local info."""
ans = self.cache.get(cond, None)
if ans is None:
cmd = (
+ self.js_args
+ options
+ [
# run in safe configuration, since it is hard to debug
# crashes when running code here. In particular, msan will
# error out if the jit is active.
p = Popen(
cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE, universal_newlines=True
out, err = p.communicate()
if out in ("true\n", "true\r\n"):
ans = True
elif out in ("false\n", "false\r\n"):
ans = False
raise Exception(
"Failed to test XUL condition {!r};"
" output was {!r}, stderr was {!r}".format(cond, out, err)
self.cache[cond] = ans
return ans
class NullXULInfoTester:
"""Can be used to parse manifests without a JS shell."""
def test(self, cond, options=[]):
return False
def _parse_one(testcase, terms, xul_tester):
pos = 0
parts = terms.split()
while pos < len(parts):
if parts[pos] == "fails":
testcase.expect = False
pos += 1
elif parts[pos] == "skip":
testcase.expect = testcase.enable = False
pos += 1
elif parts[pos] == "random":
testcase.random = True
pos += 1
elif parts[pos].startswith("shell-option("):
# This directive adds an extra option to pass to the shell.
option = parts[pos][len("shell-option(") : -1]
pos += 1
elif parts[pos].startswith("fails-if"):
cond = parts[pos][len("fails-if(") : -1]
if xul_tester.test(cond, testcase.options):
testcase.expect = False
pos += 1
elif parts[pos].startswith("asserts-if"):
# This directive means we may flunk some number of
# NS_ASSERTIONs in the browser. For the shell, ignore it.
pos += 1
elif parts[pos].startswith("skip-if"):
cond = parts[pos][len("skip-if(") : -1]
if xul_tester.test(cond, testcase.options):
testcase.expect = testcase.enable = False
pos += 1
elif parts[pos].startswith("ignore-flag"):
flag = parts[pos][len("ignore-flag(") : -1]
pos += 1
elif parts[pos].startswith("random-if"):
cond = parts[pos][len("random-if(") : -1]
if xul_tester.test(cond, testcase.options):
testcase.random = True
pos += 1
elif parts[pos] == "slow":
testcase.slow = True
pos += 1
elif parts[pos].startswith("slow-if"):
cond = parts[pos][len("slow-if(") : -1]
if xul_tester.test(cond, testcase.options):
testcase.slow = True
pos += 1
elif parts[pos] == "silentfail":
# silentfails use tons of memory, and Darwin doesn't support ulimit.
if xul_tester.test("xulRuntime.OS == 'Darwin'", testcase.options):
testcase.expect = testcase.enable = False
pos += 1
elif parts[pos].startswith("error:"):
# This directive allows to specify an error type.
(_, _, errortype) = parts[pos].partition(":")
testcase.error = errortype
pos += 1
elif parts[pos] == "module":
# This directive marks the test as module code.
testcase.is_module = True
pos += 1
elif parts[pos] == "test262-raw":
testcase.is_test262_raw = True
pos += 1
elif parts[pos] == "async":
# This directive marks the test as async.
testcase.is_async = True
pos += 1
print('warning: invalid manifest line element "{}"'.format(parts[pos]))
pos += 1
def _build_manifest_script_entry(script_name, test):
line = []
properties = []
if test.terms:
# Remove jsreftest internal terms.
terms = " ".join(
for term in test.terms.split()
if not (
term == "module"
or term == "async"
or term.startswith("error:")
or term.startswith("ignore-flag(")
or term.startswith("shell-option(")
or term == "test262-raw"
if terms:
if test.error:
properties.append("error=" + test.error)
if test.is_module:
if test.is_async:
if test.is_test262_raw:
script = script_name
if properties:
script = ";".join([script] + properties)
if test.comment:
return " ".join(line)
def _map_prefixes_left(test_gen):
Splits tests into a dictionary keyed on the first component of the test
path, aggregating tests with a common base path into a list.
byprefix = {}
for t in test_gen:
left, sep, remainder = t.path.partition(os.sep)
if left not in byprefix:
byprefix[left] = []
if remainder:
t.path = remainder
return byprefix
def _emit_manifest_at(location, relative, test_gen, depth):
location - str: absolute path where we want to write the manifest
relative - str: relative path from topmost manifest directory to current
test_gen - (str): generator of all test paths and directorys
depth - int: number of dirs we are below the topmost manifest dir
manifests = _map_prefixes_left(test_gen)
filename = os.path.join(location, "jstests.list")
manifest = []
numTestFiles = 0
for k, test_list in manifests.items():
fullpath = os.path.join(location, k)
if os.path.isdir(fullpath):
manifest.append("include " + k + "/jstests.list")
relpath = os.path.join(relative, k)
_emit_manifest_at(fullpath, relpath, test_list, depth + 1)
numTestFiles += 1
assert len(test_list) == 1, test_list
line = _build_manifest_script_entry(k, test_list[0])
# Always present our manifest in sorted order.
# If we have tests, we have to set the url-prefix so reftest can find them.
if numTestFiles > 0:
manifest = [
"url-prefix {}jsreftest.html?test={}/".format("../" * depth, relative)
] + manifest
fp =, "w", encoding="utf-8", newline="\n")
fp.write("\n".join(manifest) + "\n")
def make_manifests(location, test_gen):
_emit_manifest_at(location, "", test_gen, 0)
def _find_all_js_files(location):
for root, dirs, files in os.walk(location):
root = root[len(location) + 1 :]
for fn in files:
if fn.endswith(".js"):
yield root, fn
# The pattern for test header lines.
# Ignore any space before the tag.
# The reftest tag is enclosed in pipes.
# Ignore any space before the options.
# Accept some options.
# Ignore space before the comments.
# Accept an optional comment starting with "--".
# Unless "--" is directly preceded by "(".
# Ignore more space.
# The actual comment.
# Start a single line comment
+ r"""
# Match the end of line.
# Start a multi line comment
+ r"""
# Match the end of comment.
def _append_terms_and_comment(testcase, terms, comment):
if testcase.terms is None:
testcase.terms = terms
testcase.terms += " " + terms
if testcase.comment is None:
testcase.comment = comment
elif comment:
testcase.comment += "; " + comment
def _parse_test_header(fullpath, testcase, xul_tester):
This looks a bit weird. The reason is that it needs to be efficient, since
it has to be done on every test
if six.PY3:
fp = open(fullpath, encoding="utf-8")
fp = open(fullpath)
buf =
# Bail early if we do not start with a single comment.
if not buf.startswith("//"):
# Extract the token.
buf, _, _ = buf.partition("\n")
matches = TEST_HEADER_PATTERN_INLINE.match(buf)
if not matches:
matches = TEST_HEADER_PATTERN_MULTI.match(buf)
if not matches:
testcase.tag ="tag")
_parse_one(testcase,"options"), xul_tester)
def _parse_external_manifest(filename, relpath):
Reads an external manifest file for test suites whose individual test cases
can't be decorated with reftest comments.
filename - str: name of the manifest file
relpath - str: relative path of the directory containing the manifest
within the test suite
if not os.path.exists(filename):
return []
entries = []
with, "r", encoding="utf-8") as fp:
manifest_re = re.compile(
include_re = re.compile(r"^\s*include\s+(?P<path>\S+)$")
for line in fp:
line, _, comment = line.partition("#")
line = line.strip()
if not line:
matches = manifest_re.match(line)
if not matches:
matches = include_re.match(line)
if not matches:
"warning: unrecognized line in jstests.list:"
" {0}".format(line)
include_file ="path")
include_filename = os.path.join(os.path.dirname(filename), include_file)
include_relpath = os.path.join(relpath, os.path.dirname(include_file))
include_entries = _parse_external_manifest(
include_filename, include_relpath
path = os.path.normpath(os.path.join(relpath,"path")))
if"type") == "include":
# The manifest spec wants a reference to another manifest here,
# but we need just the directory. We do need the trailing
# separator so we don't accidentally match other paths of which
# this one is a prefix.
assert path.endswith("jstests.list")
path = path[: -len("jstests.list")]
"path": path,
"comment": comment.strip(),
# if one directory name is a prefix of another, we want the shorter one
# first
entries.sort(key=lambda x: x["path"])
return entries
def _apply_external_manifests(filename, testcase, entries, xul_tester):
for entry in entries:
if filename.startswith(entry["path"]):
# The reftest spec would require combining the terms (failure types)
# that may already be defined in the test case with the terms
# specified in entry; for example, a skip overrides a random, which
# overrides a fails. Since we don't necessarily know yet in which
# environment the test cases will be run, we'd also have to
# consider skip-if, random-if, and fails-if with as-yet unresolved
# conditions.
# At this point, we use external manifests only for test cases
# that can't have their own failure type comments, so we simply
# use the terms for the most specific path.
_append_terms_and_comment(testcase, entry["terms"], entry["comment"])
_parse_one(testcase, entry["terms"], xul_tester)
def _is_test_file(path_from_root, basename, filename, path_options):
# Any file whose basename matches something in this set is ignored.
# Skip js files in the root test directory.
if not path_from_root:
return False
# Skip files that we know are not tests.
if basename in EXCLUDED:
return False
if not path_options.should_run(filename):
return False
return True
def count_tests(location, path_options):
count = 0
for root, basename in _find_all_js_files(location):
filename = os.path.join(root, basename)
if _is_test_file(root, basename, filename, path_options):
count += 1
return count
def load_reftests(location, path_options, xul_tester):
Locates all tests by walking the filesystem starting at |location|.
Uses xul_tester to evaluate any test conditions in the test header.
Failure type and comment for a test case can come from
- an external manifest entry for the test case,
- an external manifest entry for a containing directory,
- most commonly: the header of the test case itself.
manifestFile = os.path.join(location, "jstests.list")
externalManifestEntries = _parse_external_manifest(manifestFile, "")
for root, basename in _find_all_js_files(location):
# Get the full path and relative location of the file.
filename = os.path.join(root, basename)
if not _is_test_file(root, basename, filename, path_options):
# Skip empty files.
fullpath = os.path.join(location, filename)
testcase = RefTestCase(location, filename)
filename, testcase, externalManifestEntries, xul_tester
_parse_test_header(fullpath, testcase, xul_tester)
yield testcase