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|
# frozen_string_literal: true
require 'pp'
module Test
module Unit
module Assertions
##
# Returns the diff command to use in #diff. Tries to intelligently
# figure out what diff to use.
def self.diff
unless defined? @diff
exe = RbConfig::CONFIG['EXEEXT']
@diff = %W"gdiff#{exe} diff#{exe}".find do |diff|
if system(diff, "-u", __FILE__, __FILE__)
break "#{diff} -u"
end
end
end
@diff
end
##
# Set the diff command to use in #diff.
def self.diff= o
@diff = o
end
##
# Returns a diff between +exp+ and +act+. If there is no known
# diff command or if it doesn't make sense to diff the output
# (single line, short output), then it simply returns a basic
# comparison between the two.
def diff exp, act
require "tempfile"
expect = mu_pp_for_diff exp
butwas = mu_pp_for_diff act
result = nil
need_to_diff =
self.class.diff &&
(expect.include?("\n") ||
butwas.include?("\n") ||
expect.size > 30 ||
butwas.size > 30 ||
expect == butwas)
return "Expected: #{mu_pp exp}\n Actual: #{mu_pp act}" unless
need_to_diff
tempfile_a = nil
tempfile_b = nil
Tempfile.open("expect") do |a|
tempfile_a = a
a.puts expect
a.flush
Tempfile.open("butwas") do |b|
tempfile_b = b
b.puts butwas
b.flush
result = `#{self.class.diff} #{a.path} #{b.path}`
result.sub!(/^\-\-\- .+/, "--- expected")
result.sub!(/^\+\+\+ .+/, "+++ actual")
if result.empty? then
klass = exp.class
result = [
"No visible difference in the #{klass}#inspect output.\n",
"You should look at the implementation of #== on ",
"#{klass} or its members.\n",
expect,
].join
end
end
end
result
ensure
tempfile_a.close! if tempfile_a
tempfile_b.close! if tempfile_b
end
##
# This returns a diff-able human-readable version of +obj+. This
# differs from the regular mu_pp because it expands escaped
# newlines and makes hex-values generic (like object_ids). This
# uses mu_pp to do the first pass and then cleans it up.
def mu_pp_for_diff obj
mu_pp(obj).gsub(/(?<!\\)(?:\\\\)*\K\\n/, "\n").gsub(/:0x[a-fA-F0-9]{4,}/m, ':0xXXXXXX')
end
##
# Fails unless +test+ is a true value.
def assert test, msg = nil
msg ||= "Failed assertion, no message given."
self._assertions += 1
unless test then
msg = msg.call if Proc === msg
raise Test::Unit::AssertionFailedError, msg
end
true
end
##
# Fails unless +obj+ is empty.
def assert_empty obj, msg = nil
msg = message(msg) { "Expected #{mu_pp(obj)} to be empty" }
assert_respond_to obj, :empty?
assert obj.empty?, msg
end
##
# For comparing Floats. Fails unless +exp+ and +act+ are within +delta+
# of each other.
#
# assert_in_delta Math::PI, (22.0 / 7.0), 0.01
def assert_in_delta exp, act, delta = 0.001, msg = nil
n = (exp - act).abs
msg = message(msg) {
"Expected |#{exp} - #{act}| (#{n}) to be <= #{delta}"
}
assert delta >= n, msg
end
##
# For comparing Floats. Fails unless +exp+ and +act+ have a relative
# error less than +epsilon+.
def assert_in_epsilon a, b, epsilon = 0.001, msg = nil
assert_in_delta a, b, [a.abs, b.abs].min * epsilon, msg
end
##
# Fails unless +collection+ includes +obj+.
def assert_includes collection, obj, msg = nil
msg = message(msg) {
"Expected #{mu_pp(collection)} to include #{mu_pp(obj)}"
}
assert_respond_to collection, :include?
assert collection.include?(obj), msg
end
##
# Fails unless +obj+ is an instance of +cls+.
def assert_instance_of cls, obj, msg = nil
msg = message(msg) {
"Expected #{mu_pp(obj)} to be an instance of #{cls}, not #{obj.class}"
}
assert obj.instance_of?(cls), msg
end
##
# Fails unless +obj+ is a kind of +cls+.
def assert_kind_of cls, obj, msg = nil # TODO: merge with instance_of
msg = message(msg) {
"Expected #{mu_pp(obj)} to be a kind of #{cls}, not #{obj.class}" }
assert obj.kind_of?(cls), msg
end
##
# Fails unless +matcher+ <tt>=~</tt> +obj+.
def assert_match matcher, obj, msg = nil
msg = message(msg) { "Expected #{mu_pp matcher} to match #{mu_pp obj}" }
assert_respond_to matcher, :"=~"
matcher = Regexp.new Regexp.escape matcher if String === matcher
assert matcher =~ obj, msg
end
##
# Fails unless +obj+ is nil
def assert_nil obj, msg = nil
msg = message(msg) { "Expected #{mu_pp(obj)} to be nil" }
assert obj.nil?, msg
end
##
# Fails unless +obj+ is true
def assert_true obj, msg = nil
msg = message(msg) { "Expected #{mu_pp(obj)} to be true" }
assert obj == true, msg
end
##
# Fails unless +obj+ is false
def assert_false obj, msg = nil
msg = message(msg) { "Expected #{mu_pp(obj)} to be false" }
assert obj == false, msg
end
##
# For testing with binary operators.
#
# assert_operator 5, :<=, 4
def assert_operator o1, op, o2 = (predicate = true; nil), msg = nil
return assert_predicate o1, op, msg if predicate
msg = message(msg) { "Expected #{mu_pp(o1)} to be #{op} #{mu_pp(o2)}" }
assert o1.__send__(op, o2), msg
end
##
# Fails if stdout or stderr do not output the expected results.
# Pass in nil if you don't care about that streams output. Pass in
# "" if you require it to be silent. Pass in a regexp if you want
# to pattern match.
#
# NOTE: this uses #capture_io, not #capture_subprocess_io.
#
# See also: #assert_silent
def assert_output stdout = nil, stderr = nil
out, err = capture_output do
yield
end
err_msg = Regexp === stderr ? :assert_match : :assert_equal if stderr
out_msg = Regexp === stdout ? :assert_match : :assert_equal if stdout
y = send err_msg, stderr, err, "In stderr" if err_msg
x = send out_msg, stdout, out, "In stdout" if out_msg
(!stdout || x) && (!stderr || y)
end
##
# For testing with predicates.
#
# assert_predicate str, :empty?
#
# This is really meant for specs and is front-ended by assert_operator:
#
# str.must_be :empty?
def assert_predicate o1, op, msg = nil
msg = message(msg) { "Expected #{mu_pp(o1)} to be #{op}" }
assert o1.__send__(op), msg
end
##
# Fails unless +obj+ responds to +meth+.
def assert_respond_to obj, meth, msg = nil
msg = message(msg) {
"Expected #{mu_pp(obj)} (#{obj.class}) to respond to ##{meth}"
}
assert obj.respond_to?(meth), msg
end
##
# Fails unless +exp+ and +act+ are #equal?
def assert_same exp, act, msg = nil
msg = message(msg) {
data = [mu_pp(act), act.object_id, mu_pp(exp), exp.object_id]
"Expected %s (oid=%d) to be the same as %s (oid=%d)" % data
}
assert exp.equal?(act), msg
end
##
# Fails if the block outputs anything to stderr or stdout.
#
# See also: #assert_output
def assert_silent
assert_output "", "" do
yield
end
end
##
# Fails unless the block throws +sym+
def assert_throws sym, msg = nil
default = "Expected #{mu_pp(sym)} to have been thrown"
caught = true
catch(sym) do
begin
yield
rescue ThreadError => e # wtf?!? 1.8 + threads == suck
default += ", not \:#{e.message[/uncaught throw \`(\w+?)\'/, 1]}"
rescue ArgumentError => e # 1.9 exception
default += ", not #{e.message.split(/ /).last}"
rescue NameError => e # 1.8 exception
default += ", not #{e.name.inspect}"
end
caught = false
end
assert caught, message(msg) { default }
end
def assert_path_exists(path, msg = nil)
msg = message(msg) { "Expected path '#{path}' to exist" }
assert File.exist?(path), msg
end
alias assert_path_exist assert_path_exists
alias refute_path_not_exist assert_path_exists
def refute_path_exists(path, msg = nil)
msg = message(msg) { "Expected path '#{path}' to not exist" }
refute File.exist?(path), msg
end
alias refute_path_exist refute_path_exists
alias assert_path_not_exist refute_path_exists
##
# Captures $stdout and $stderr into strings:
#
# out, err = capture_output do
# puts "Some info"
# warn "You did a bad thing"
# end
#
# assert_match %r%info%, out
# assert_match %r%bad%, err
def capture_output
require 'stringio'
captured_stdout, captured_stderr = StringIO.new, StringIO.new
synchronize do
orig_stdout, orig_stderr = $stdout, $stderr
$stdout, $stderr = captured_stdout, captured_stderr
begin
yield
ensure
$stdout = orig_stdout
$stderr = orig_stderr
end
end
return captured_stdout.string, captured_stderr.string
end
def capture_io
raise NoMethodError, "use capture_output"
end
##
# Fails with +msg+
def flunk msg = nil
msg ||= "Epic Fail!"
assert false, msg
end
##
# used for counting assertions
def pass msg = nil
assert true
end
##
# Fails if +test+ is a true value
def refute test, msg = nil
msg ||= "Failed refutation, no message given"
not assert(! test, msg)
end
##
# Fails if +obj+ is empty.
def refute_empty obj, msg = nil
msg = message(msg) { "Expected #{mu_pp(obj)} to not be empty" }
assert_respond_to obj, :empty?
refute obj.empty?, msg
end
##
# Fails if <tt>exp == act</tt>.
#
# For floats use refute_in_delta.
def refute_equal exp, act, msg = nil
msg = message(msg) {
"Expected #{mu_pp(act)} to not be equal to #{mu_pp(exp)}"
}
refute exp == act, msg
end
##
# For comparing Floats. Fails if +exp+ is within +delta+ of +act+.
#
# refute_in_delta Math::PI, (22.0 / 7.0)
def refute_in_delta exp, act, delta = 0.001, msg = nil
n = (exp - act).abs
msg = message(msg) {
"Expected |#{exp} - #{act}| (#{n}) to not be <= #{delta}"
}
refute delta >= n, msg
end
##
# For comparing Floats. Fails if +exp+ and +act+ have a relative error
# less than +epsilon+.
def refute_in_epsilon a, b, epsilon = 0.001, msg = nil
refute_in_delta a, b, a * epsilon, msg
end
##
# Fails if +collection+ includes +obj+.
def refute_includes collection, obj, msg = nil
msg = message(msg) {
"Expected #{mu_pp(collection)} to not include #{mu_pp(obj)}"
}
assert_respond_to collection, :include?
refute collection.include?(obj), msg
end
##
# Fails if +obj+ is an instance of +cls+.
def refute_instance_of cls, obj, msg = nil
msg = message(msg) {
"Expected #{mu_pp(obj)} to not be an instance of #{cls}"
}
refute obj.instance_of?(cls), msg
end
##
# Fails if +obj+ is a kind of +cls+.
def refute_kind_of cls, obj, msg = nil # TODO: merge with instance_of
msg = message(msg) { "Expected #{mu_pp(obj)} to not be a kind of #{cls}" }
refute obj.kind_of?(cls), msg
end
##
# Fails if +matcher+ <tt>=~</tt> +obj+.
def refute_match matcher, obj, msg = nil
msg = message(msg) {"Expected #{mu_pp matcher} to not match #{mu_pp obj}"}
assert_respond_to matcher, :"=~"
matcher = Regexp.new Regexp.escape matcher if String === matcher
refute matcher =~ obj, msg
end
##
# Fails if +obj+ is nil.
def refute_nil obj, msg = nil
msg = message(msg) { "Expected #{mu_pp(obj)} to not be nil" }
refute obj.nil?, msg
end
##
# Fails if +o1+ is not +op+ +o2+. Eg:
#
# refute_operator 1, :>, 2 #=> pass
# refute_operator 1, :<, 2 #=> fail
def refute_operator o1, op, o2 = (predicate = true; nil), msg = nil
return refute_predicate o1, op, msg if predicate
msg = message(msg) { "Expected #{mu_pp(o1)} to not be #{op} #{mu_pp(o2)}"}
refute o1.__send__(op, o2), msg
end
##
# For testing with predicates.
#
# refute_predicate str, :empty?
#
# This is really meant for specs and is front-ended by refute_operator:
#
# str.wont_be :empty?
def refute_predicate o1, op, msg = nil
msg = message(msg) { "Expected #{mu_pp(o1)} to not be #{op}" }
refute o1.__send__(op), msg
end
##
# Fails if +obj+ responds to the message +meth+.
def refute_respond_to obj, meth, msg = nil
msg = message(msg) { "Expected #{mu_pp(obj)} to not respond to #{meth}" }
refute obj.respond_to?(meth), msg
end
##
# Fails if +exp+ is the same (by object identity) as +act+.
def refute_same exp, act, msg = nil
msg = message(msg) {
data = [mu_pp(act), act.object_id, mu_pp(exp), exp.object_id]
"Expected %s (oid=%d) to not be the same as %s (oid=%d)" % data
}
refute exp.equal?(act), msg
end
##
# Skips the current test. Gets listed at the end of the run but
# doesn't cause a failure exit code.
def pend msg = nil, bt = caller
msg ||= "Skipped, no message given"
@skip = true
raise Test::Unit::PendedError, msg, bt
end
alias omit pend
def skip(msg = nil, bt = caller)
raise NoMethodError, "use omit or pend", caller
end
##
# Was this testcase skipped? Meant for #teardown.
def skipped?
defined?(@skip) and @skip
end
##
# Takes a block and wraps it with the runner's shared mutex.
def synchronize
Test::Unit::Runner.runner.synchronize do
yield
end
end
# :call-seq:
# assert_block( failure_message = nil )
#
#Tests the result of the given block. If the block does not return true,
#the assertion will fail. The optional +failure_message+ argument is the same as in
#Assertions#assert.
#
# assert_block do
# [1, 2, 3].any? { |num| num < 1 }
# end
def assert_block(*msgs)
assert yield, *msgs
end
# :call-seq:
# assert_nothing_thrown( failure_message = nil, &block )
#
#Fails if the given block uses a call to Kernel#throw, and
#returns the result of the block otherwise.
#
#An optional failure message may be provided as the final argument.
#
# assert_nothing_thrown "Something was thrown!" do
# throw :problem?
# end
def assert_nothing_thrown(msg=nil)
begin
ret = yield
rescue ArgumentError => error
raise error if /\Auncaught throw (.+)\z/m !~ error.message
msg = message(msg) { "<#{$1}> was thrown when nothing was expected" }
flunk(msg)
end
assert(true, "Expected nothing to be thrown")
ret
end
# :call-seq:
# assert_equal( expected, actual, failure_message = nil )
#
#Tests if +expected+ is equal to +actual+.
#
#An optional failure message may be provided as the final argument.
def assert_equal(exp, act, msg = nil)
msg = message(msg) {
exp_str = mu_pp(exp)
act_str = mu_pp(act)
exp_comment = ''
act_comment = ''
if exp_str == act_str
if (exp.is_a?(String) && act.is_a?(String)) ||
(exp.is_a?(Regexp) && act.is_a?(Regexp))
exp_comment = " (#{exp.encoding})"
act_comment = " (#{act.encoding})"
elsif exp.is_a?(Float) && act.is_a?(Float)
exp_str = "%\#.#{Float::DIG+2}g" % exp
act_str = "%\#.#{Float::DIG+2}g" % act
elsif exp.is_a?(Time) && act.is_a?(Time)
if exp.subsec * 1000_000_000 == exp.nsec
exp_comment = " (#{exp.nsec}[ns])"
else
exp_comment = " (subsec=#{exp.subsec})"
end
if act.subsec * 1000_000_000 == act.nsec
act_comment = " (#{act.nsec}[ns])"
else
act_comment = " (subsec=#{act.subsec})"
end
elsif exp.class != act.class
# a subclass of Range, for example.
exp_comment = " (#{exp.class})"
act_comment = " (#{act.class})"
end
elsif !Encoding.compatible?(exp_str, act_str)
if exp.is_a?(String) && act.is_a?(String)
exp_str = exp.dump
act_str = act.dump
exp_comment = " (#{exp.encoding})"
act_comment = " (#{act.encoding})"
else
exp_str = exp_str.dump
act_str = act_str.dump
end
end
"<#{exp_str}>#{exp_comment} expected but was\n<#{act_str}>#{act_comment}"
}
assert(exp == act, msg)
end
# :call-seq:
# assert_not_nil( expression, failure_message = nil )
#
#Tests if +expression+ is not nil.
#
#An optional failure message may be provided as the final argument.
def assert_not_nil(exp, msg=nil)
msg = message(msg) { "<#{mu_pp(exp)}> expected to not be nil" }
assert(!exp.nil?, msg)
end
# :call-seq:
# assert_not_equal( expected, actual, failure_message = nil )
#
#Tests if +expected+ is not equal to +actual+.
#
#An optional failure message may be provided as the final argument.
def assert_not_equal(exp, act, msg=nil)
msg = message(msg) { "<#{mu_pp(exp)}> expected to be != to\n<#{mu_pp(act)}>" }
assert(exp != act, msg)
end
# :call-seq:
# assert_no_match( regexp, string, failure_message = nil )
#
#Tests if the given Regexp does not match a given String.
#
#An optional failure message may be provided as the final argument.
def assert_no_match(regexp, string, msg=nil)
assert_instance_of(Regexp, regexp, "The first argument to assert_no_match should be a Regexp.")
self._assertions -= 1
msg = message(msg) { "<#{mu_pp(regexp)}> expected to not match\n<#{mu_pp(string)}>" }
assert(regexp !~ string, msg)
end
# :call-seq:
# assert_not_same( expected, actual, failure_message = nil )
#
#Tests if +expected+ is not the same object as +actual+.
#This test uses Object#equal? to test equality.
#
#An optional failure message may be provided as the final argument.
#
# assert_not_same("x", "x") #Succeeds
def assert_not_same(expected, actual, message="")
msg = message(msg) { build_message(message, <<EOT, expected, expected.__id__, actual, actual.__id__) }
<?>
with id <?> expected to not be equal\\? to
<?>
with id <?>.
EOT
assert(!actual.equal?(expected), msg)
end
# :call-seq:
# assert_send( +send_array+, failure_message = nil )
#
# Passes if the method send returns a true value.
#
# +send_array+ is composed of:
# * A receiver
# * A method
# * Arguments to the method
#
# Example:
# assert_send(["Hello world", :include?, "Hello"]) # -> pass
# assert_send(["Hello world", :include?, "Goodbye"]) # -> fail
def assert_send send_ary, m = nil
recv, msg, *args = send_ary
m = message(m) {
if args.empty?
argsstr = ""
else
(argsstr = mu_pp(args)).sub!(/\A\[(.*)\]\z/m, '(\1)')
end
"Expected #{mu_pp(recv)}.#{msg}#{argsstr} to return true"
}
assert recv.__send__(msg, *args), m
end
# :call-seq:
# assert_not_send( +send_array+, failure_message = nil )
#
# Passes if the method send doesn't return a true value.
#
# +send_array+ is composed of:
# * A receiver
# * A method
# * Arguments to the method
#
# Example:
# assert_not_send([[1, 2], :member?, 1]) # -> fail
# assert_not_send([[1, 2], :member?, 4]) # -> pass
def assert_not_send send_ary, m = nil
recv, msg, *args = send_ary
m = message(m) {
if args.empty?
argsstr = ""
else
(argsstr = mu_pp(args)).sub!(/\A\[(.*)\]\z/m, '(\1)')
end
"Expected #{mu_pp(recv)}.#{msg}#{argsstr} to return false"
}
assert !recv.__send__(msg, *args), m
end
ms = instance_methods(true).map {|sym| sym.to_s }
ms.grep(/\Arefute_/) do |m|
mname = ('assert_not_'.dup << m.to_s[/.*?_(.*)/, 1])
alias_method(mname, m) unless ms.include? mname
end
alias assert_include assert_includes
alias assert_not_include assert_not_includes
def assert_not_all?(obj, m = nil, &blk)
failed = []
obj.each do |*a, &b|
if blk.call(*a, &b)
failed << (a.size > 1 ? a : a[0])
end
end
assert(failed.empty?, message(m) {failed.pretty_inspect})
end
def assert_syntax_error(code, error, *args, **opt)
prepare_syntax_check(code, *args, **opt) do |src, fname, line, mesg|
yield if defined?(yield)
e = assert_raise(SyntaxError, mesg) do
syntax_check(src, fname, line)
end
# Prism adds ANSI escape sequences to syntax error messages to
# colorize and format them. We strip them out here to make them easier
# to match against in tests.
message = e.message
message.gsub!(/\e\[.*?m/, "")
assert_match(error, message, mesg)
e
end
end
def assert_no_warning(pat, msg = nil)
result = nil
stderr = EnvUtil.verbose_warning {
EnvUtil.with_default_internal(pat.encoding) {
result = yield
}
}
msg = message(msg) {diff pat, stderr}
refute(pat === stderr, msg)
result
end
# kernel resolution can limit the minimum time we can measure
# [ruby-core:81540]
MIN_HZ = /mswin|mingw/ =~ RUBY_PLATFORM ? 67 : 100
MIN_MEASURABLE = 1.0 / MIN_HZ
def assert_cpu_usage_low(msg = nil, pct: 0.05, wait: 1.0, stop: nil)
require 'benchmark'
wait = EnvUtil.apply_timeout_scale(wait)
if wait < 0.1 # TIME_QUANTUM_USEC in thread_pthread.c
warn "test #{msg || 'assert_cpu_usage_low'} too short to be accurate"
end
tms = Benchmark.measure(msg || '') do
if stop
th = Thread.start {sleep wait; stop.call}
yield
th.join
else
begin
Timeout.timeout(wait) {yield}
rescue Timeout::Error
end
end
end
max = pct * tms.real
min_measurable = MIN_MEASURABLE
min_measurable *= 1.30 # add a little (30%) to account for misc. overheads
if max < min_measurable
max = min_measurable
end
assert_operator tms.total, :<=, max, msg
end
def assert_is_minus_zero(f)
assert(1.0/f == -Float::INFINITY, "#{f} is not -0.0")
end
def build_message(head, template=nil, *arguments) #:nodoc:
template &&= template.chomp
template.gsub(/\G((?:[^\\]|\\.)*?)(\\)?\?/) { $1 + ($2 ? "?" : mu_pp(arguments.shift)) }
end
end
end
end
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