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require "coverage"
Coverage.start(lines: true, branches: true, methods: true)
TEST_COVERAGE_DATA_FILE = "test-coverage.dat"
def merge_coverage_data(res1, res2)
res1.each do |path, cov1|
cov2 = res2[path]
if cov2
cov1[:lines].each_with_index do |count1, i|
next unless count1
add_count(cov2[:lines], i, count1)
end
cov1[:branches].each do |base_key, targets1|
if cov2[:branches][base_key]
targets1.each do |target_key, count1|
add_count(cov2[:branches][base_key], target_key, count1)
end
else
cov2[:branches][base_key] = targets1
end
end
cov1[:methods].each do |key, count1|
add_count(cov2[:methods], key, count1)
end
else
res2[path] = cov1
end
end
res2
end
def add_count(h, key, count)
if h[key]
h[key] += count
else
h[key] = count
end
end
def save_coverage_data(res1)
res1.each do |_path, cov|
if cov[:methods]
h = {}
cov[:methods].each do |(klass, *key), count|
h[[klass.name, *key]] = count
end
cov[:methods].replace h
end
end
File.open(TEST_COVERAGE_DATA_FILE, File::RDWR | File::CREAT | File::BINARY) do |f|
f.flock(File::LOCK_EX)
s = f.read
res2 = s.size > 0 ? Marshal.load(s) : {}
res1 = merge_coverage_data(res1, res2)
f.rewind
f << Marshal.dump(res2)
f.flush
f.truncate(f.pos)
end
end
def invoke_simplecov_formatter
%w[doclie simplecov-html simplecov].each do |f|
$LOAD_PATH.unshift "#{__dir__}/../coverage/#{f}/lib"
end
require "simplecov"
res = Marshal.load(File.binread(TEST_COVERAGE_DATA_FILE))
simplecov_result = {}
base_dir = File.dirname(__dir__)
cur_dir = Dir.pwd
res.each do |path, cov|
next unless path.start_with?(base_dir) || path.start_with?(cur_dir)
next if path.start_with?(File.join(base_dir, "test"))
simplecov_result[path] = cov[:lines]
end
a, b = base_dir, cur_dir
until a == b
if a.size > b.size
a = File.dirname(a)
else
b = File.dirname(b)
end
end
root_dir = a
SimpleCov.configure do
root(root_dir)
coverage_dir(File.join(cur_dir, "coverage"))
end
res = SimpleCov::Result.new(simplecov_result)
res.command_name = "Ruby's `make test-all`"
SimpleCov::Formatter::HTMLFormatter.new.format(res)
end
pid = $$
pwd = Dir.pwd
at_exit do
exit_exc = $!
Dir.chdir(pwd) do
save_coverage_data(Coverage.result)
if pid == $$
begin
nil while Process.waitpid(-1)
rescue Errno::ECHILD
invoke_simplecov_formatter
end
end
end
raise exit_exc if exit_exc
end
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