809 lines
22 KiB
Ruby
809 lines
22 KiB
Ruby
# encoding: UTF-8
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require "rbconfig"
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require "tempfile"
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require "stringio"
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module Minitest
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##
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# Minitest Assertions. All assertion methods accept a +msg+ which is
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# printed if the assertion fails.
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#
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# Protocol: Nearly everything here boils up to +assert+, which
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# expects to be able to increment an instance accessor named
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# +assertions+. This is not provided by Assertions and must be
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# provided by the thing including Assertions. See Minitest::Runnable
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# for an example.
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module Assertions
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UNDEFINED = Object.new # :nodoc:
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def UNDEFINED.inspect # :nodoc:
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"UNDEFINED" # again with the rdoc bugs... :(
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end
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##
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# Returns the diff command to use in #diff. Tries to intelligently
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# figure out what diff to use.
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def self.diff
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return @diff if defined? @diff
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@diff = if (RbConfig::CONFIG["host_os"] =~ /mswin|mingw/ &&
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system("diff.exe", __FILE__, __FILE__)) then
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"diff.exe -u"
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elsif system("gdiff", __FILE__, __FILE__)
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"gdiff -u" # solaris and kin suck
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elsif system("diff", __FILE__, __FILE__)
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"diff -u"
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else
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nil
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end
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end
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##
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# Set the diff command to use in #diff.
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def self.diff= o
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@diff = o
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end
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##
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# Returns a diff between +exp+ and +act+. If there is no known
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# diff command or if it doesn't make sense to diff the output
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# (single line, short output), then it simply returns a basic
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# comparison between the two.
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#
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# See +things_to_diff+ for more info.
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def diff exp, act
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result = nil
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expect, butwas = things_to_diff(exp, act)
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return "Expected: #{mu_pp exp}\n Actual: #{mu_pp act}" unless
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expect
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Tempfile.open("expect") do |a|
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a.puts expect
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a.flush
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Tempfile.open("butwas") do |b|
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b.puts butwas
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b.flush
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result = `#{Minitest::Assertions.diff} #{a.path} #{b.path}`
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result.sub!(/^\-\-\- .+/, "--- expected")
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result.sub!(/^\+\+\+ .+/, "+++ actual")
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if result.empty? then
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klass = exp.class
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result = [
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"No visible difference in the #{klass}#inspect output.\n",
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"You should look at the implementation of #== on ",
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"#{klass} or its members.\n",
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expect,
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].join
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end
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end
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end
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result
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end
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##
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# Returns things to diff [expect, butwas], or [nil, nil] if nothing to diff.
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#
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# Criterion:
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#
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# 1. Strings include newlines or escaped newlines, but not both.
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# 2. or: String lengths are > 30 characters.
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# 3. or: Strings are equal to each other (but maybe different encodings?).
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# 4. and: we found a diff executable.
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def things_to_diff exp, act
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expect = mu_pp_for_diff exp
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butwas = mu_pp_for_diff act
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e1, e2 = expect.include?("\n"), expect.include?("\\n")
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b1, b2 = butwas.include?("\n"), butwas.include?("\\n")
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need_to_diff =
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(e1 ^ e2 ||
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b1 ^ b2 ||
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expect.size > 30 ||
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butwas.size > 30 ||
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expect == butwas) &&
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Minitest::Assertions.diff
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need_to_diff && [expect, butwas]
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end
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##
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# This returns a human-readable version of +obj+. By default
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# #inspect is called. You can override this to use #pretty_inspect
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# if you want.
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#
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# See Minitest::Test.make_my_diffs_pretty!
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def mu_pp obj
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s = obj.inspect
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if defined? Encoding then
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s = s.encode Encoding.default_external
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if String === obj && (obj.encoding != Encoding.default_external ||
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!obj.valid_encoding?) then
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enc = "# encoding: #{obj.encoding}"
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val = "# valid: #{obj.valid_encoding?}"
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s = "#{enc}\n#{val}\n#{s}"
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end
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end
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s
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end
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##
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# This returns a diff-able more human-readable version of +obj+.
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# This differs from the regular mu_pp because it expands escaped
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# newlines and makes hex-values (like object_ids) generic. This
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# uses mu_pp to do the first pass and then cleans it up.
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def mu_pp_for_diff obj
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str = mu_pp obj
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# both '\n' & '\\n' (_after_ mu_pp (aka inspect))
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single = !!str.match(/(?<!\\|^)\\n/)
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double = !!str.match(/(?<=\\|^)\\n/)
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process =
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if single ^ double then
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if single then
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lambda { |s| s == "\\n" ? "\n" : s } # unescape
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else
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lambda { |s| s == "\\\\n" ? "\\n\n" : s } # unescape a bit, add nls
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end
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else
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:itself # leave it alone
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end
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str.
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gsub(/\\?\\n/, &process).
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gsub(/:0x[a-fA-F0-9]{4,}/m, ":0xXXXXXX") # anonymize hex values
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end
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##
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# Fails unless +test+ is truthy.
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def assert test, msg = nil
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self.assertions += 1
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unless test then
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msg ||= "Expected #{mu_pp test} to be truthy."
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msg = msg.call if Proc === msg
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raise Minitest::Assertion, msg
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end
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true
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end
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def _synchronize # :nodoc:
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yield
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end
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##
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# Fails unless +obj+ is empty.
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def assert_empty obj, msg = nil
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msg = message(msg) { "Expected #{mu_pp(obj)} to be empty" }
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assert_respond_to obj, :empty?
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assert obj.empty?, msg
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end
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E = "" # :nodoc:
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##
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# Fails unless <tt>exp == act</tt> printing the difference between
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# the two, if possible.
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#
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# If there is no visible difference but the assertion fails, you
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# should suspect that your #== is buggy, or your inspect output is
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# missing crucial details. For nicer structural diffing, set
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# Minitest::Test.make_my_diffs_pretty!
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#
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# For floats use assert_in_delta.
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#
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# See also: Minitest::Assertions.diff
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def assert_equal exp, act, msg = nil
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msg = message(msg, E) { diff exp, act }
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result = assert exp == act, msg
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if nil == exp then
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if Minitest::VERSION =~ /^6/ then
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refute_nil exp, "Use assert_nil if expecting nil."
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else
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where = Minitest.filter_backtrace(caller).first
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where = where.split(/:in /, 2).first # clean up noise
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warn "DEPRECATED: Use assert_nil if expecting nil from #{where}. This will fail in Minitest 6."
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end
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end
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result
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end
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##
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# For comparing Floats. Fails unless +exp+ and +act+ are within +delta+
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# of each other.
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#
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# assert_in_delta Math::PI, (22.0 / 7.0), 0.01
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def assert_in_delta exp, act, delta = 0.001, msg = nil
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n = (exp - act).abs
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msg = message(msg) {
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"Expected |#{exp} - #{act}| (#{n}) to be <= #{delta}"
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}
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assert delta >= n, msg
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end
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##
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# For comparing Floats. Fails unless +exp+ and +act+ have a relative
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# error less than +epsilon+.
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def assert_in_epsilon exp, act, epsilon = 0.001, msg = nil
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assert_in_delta exp, act, [exp.abs, act.abs].min * epsilon, msg
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end
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##
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# Fails unless +collection+ includes +obj+.
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def assert_includes collection, obj, msg = nil
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msg = message(msg) {
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"Expected #{mu_pp(collection)} to include #{mu_pp(obj)}"
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}
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assert_respond_to collection, :include?
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assert collection.include?(obj), msg
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end
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##
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# Fails unless +obj+ is an instance of +cls+.
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def assert_instance_of cls, obj, msg = nil
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msg = message(msg) {
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"Expected #{mu_pp(obj)} to be an instance of #{cls}, not #{obj.class}"
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}
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assert obj.instance_of?(cls), msg
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end
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##
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# Fails unless +obj+ is a kind of +cls+.
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def assert_kind_of cls, obj, msg = nil
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msg = message(msg) {
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"Expected #{mu_pp(obj)} to be a kind of #{cls}, not #{obj.class}" }
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assert obj.kind_of?(cls), msg
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end
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##
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# Fails unless +matcher+ <tt>=~</tt> +obj+.
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def assert_match matcher, obj, msg = nil
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msg = message(msg) { "Expected #{mu_pp matcher} to match #{mu_pp obj}" }
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assert_respond_to matcher, :"=~"
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matcher = Regexp.new Regexp.escape matcher if String === matcher
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assert matcher =~ obj, msg
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Regexp.last_match
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end
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##
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# Fails unless +obj+ is nil
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def assert_nil obj, msg = nil
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msg = message(msg) { "Expected #{mu_pp(obj)} to be nil" }
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assert obj.nil?, msg
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end
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##
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# For testing with binary operators. Eg:
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#
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# assert_operator 5, :<=, 4
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def assert_operator o1, op, o2 = UNDEFINED, msg = nil
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return assert_predicate o1, op, msg if UNDEFINED == o2
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msg = message(msg) { "Expected #{mu_pp(o1)} to be #{op} #{mu_pp(o2)}" }
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assert o1.__send__(op, o2), msg
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end
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##
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# Fails if stdout or stderr do not output the expected results.
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# Pass in nil if you don't care about that streams output. Pass in
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# "" if you require it to be silent. Pass in a regexp if you want
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# to pattern match.
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#
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# assert_output(/hey/) { method_with_output }
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#
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# NOTE: this uses #capture_io, not #capture_subprocess_io.
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#
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# See also: #assert_silent
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def assert_output stdout = nil, stderr = nil
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flunk "assert_output requires a block to capture output." unless
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block_given?
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out, err = capture_io do
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yield
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end
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err_msg = Regexp === stderr ? :assert_match : :assert_equal if stderr
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out_msg = Regexp === stdout ? :assert_match : :assert_equal if stdout
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y = send err_msg, stderr, err, "In stderr" if err_msg
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x = send out_msg, stdout, out, "In stdout" if out_msg
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(!stdout || x) && (!stderr || y)
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rescue Assertion
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raise
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rescue => e
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raise UnexpectedError, e
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end
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##
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# Fails unless +path+ exists.
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def assert_path_exists path, msg = nil
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msg = message(msg) { "Expected path '#{path}' to exist" }
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assert File.exist?(path), msg
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end
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##
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# For testing with predicates. Eg:
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#
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# assert_predicate str, :empty?
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#
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# This is really meant for specs and is front-ended by assert_operator:
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#
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# str.must_be :empty?
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def assert_predicate o1, op, msg = nil
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msg = message(msg) { "Expected #{mu_pp(o1)} to be #{op}" }
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assert o1.__send__(op), msg
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end
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##
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# Fails unless the block raises one of +exp+. Returns the
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# exception matched so you can check the message, attributes, etc.
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#
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# +exp+ takes an optional message on the end to help explain
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# failures and defaults to StandardError if no exception class is
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# passed. Eg:
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#
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# assert_raises(CustomError) { method_with_custom_error }
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#
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# With custom error message:
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#
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# assert_raises(CustomError, 'This should have raised CustomError') { method_with_custom_error }
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#
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# Using the returned object:
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#
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# error = assert_raises(CustomError) do
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# raise CustomError, 'This is really bad'
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# end
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#
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# assert_equal 'This is really bad', error.message
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def assert_raises *exp
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flunk "assert_raises requires a block to capture errors." unless
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block_given?
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msg = "#{exp.pop}.\n" if String === exp.last
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exp << StandardError if exp.empty?
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begin
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yield
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rescue *exp => e
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pass # count assertion
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return e
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rescue Minitest::Assertion # incl Skip & UnexpectedError
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# don't count assertion
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raise
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rescue SignalException, SystemExit
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raise
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rescue Exception => e
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flunk proc {
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exception_details(e, "#{msg}#{mu_pp(exp)} exception expected, not")
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}
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end
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exp = exp.first if exp.size == 1
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flunk "#{msg}#{mu_pp(exp)} expected but nothing was raised."
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end
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##
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# Fails unless +obj+ responds to +meth+.
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def assert_respond_to obj, meth, msg = nil
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msg = message(msg) {
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"Expected #{mu_pp(obj)} (#{obj.class}) to respond to ##{meth}"
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}
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assert obj.respond_to?(meth), msg
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end
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##
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# Fails unless +exp+ and +act+ are #equal?
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def assert_same exp, act, msg = nil
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msg = message(msg) {
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data = [mu_pp(act), act.object_id, mu_pp(exp), exp.object_id]
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"Expected %s (oid=%d) to be the same as %s (oid=%d)" % data
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}
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assert exp.equal?(act), msg
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end
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##
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# +send_ary+ is a receiver, message and arguments.
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#
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# Fails unless the call returns a true value
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def assert_send send_ary, m = nil
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where = Minitest.filter_backtrace(caller).first
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where = where.split(/:in /, 2).first # clean up noise
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warn "DEPRECATED: assert_send. From #{where}"
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recv, msg, *args = send_ary
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m = message(m) {
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"Expected #{mu_pp(recv)}.#{msg}(*#{mu_pp(args)}) to return true" }
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assert recv.__send__(msg, *args), m
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end
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##
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# Fails if the block outputs anything to stderr or stdout.
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#
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# See also: #assert_output
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def assert_silent
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assert_output "", "" do
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yield
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end
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end
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##
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# Fails unless the block throws +sym+
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def assert_throws sym, msg = nil
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default = "Expected #{mu_pp(sym)} to have been thrown"
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caught = true
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value = catch(sym) do
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begin
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yield
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rescue ThreadError => e # wtf?!? 1.8 + threads == suck
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default += ", not \:#{e.message[/uncaught throw \`(\w+?)\'/, 1]}"
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rescue ArgumentError => e # 1.9 exception
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raise e unless e.message.include?("uncaught throw")
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default += ", not #{e.message.split(/ /).last}"
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rescue NameError => e # 1.8 exception
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raise e unless e.name == sym
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default += ", not #{e.name.inspect}"
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end
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caught = false
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end
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assert caught, message(msg) { default }
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value
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rescue Assertion
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raise
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rescue => e
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raise UnexpectedError, e
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end
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##
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# Captures $stdout and $stderr into strings:
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#
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# out, err = capture_io do
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# puts "Some info"
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# warn "You did a bad thing"
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# end
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#
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# assert_match %r%info%, out
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# assert_match %r%bad%, err
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#
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# NOTE: For efficiency, this method uses StringIO and does not
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# capture IO for subprocesses. Use #capture_subprocess_io for
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# that.
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def capture_io
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_synchronize do
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begin
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captured_stdout, captured_stderr = StringIO.new, StringIO.new
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orig_stdout, orig_stderr = $stdout, $stderr
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$stdout, $stderr = captured_stdout, captured_stderr
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yield
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return captured_stdout.string, captured_stderr.string
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ensure
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$stdout = orig_stdout
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$stderr = orig_stderr
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end
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end
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end
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##
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# Captures $stdout and $stderr into strings, using Tempfile to
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# ensure that subprocess IO is captured as well.
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#
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# out, err = capture_subprocess_io do
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# system "echo Some info"
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# system "echo You did a bad thing 1>&2"
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# end
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#
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# assert_match %r%info%, out
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# assert_match %r%bad%, err
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#
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# NOTE: This method is approximately 10x slower than #capture_io so
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# only use it when you need to test the output of a subprocess.
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def capture_subprocess_io
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_synchronize do
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begin
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require "tempfile"
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captured_stdout, captured_stderr = Tempfile.new("out"), Tempfile.new("err")
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orig_stdout, orig_stderr = $stdout.dup, $stderr.dup
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$stdout.reopen captured_stdout
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$stderr.reopen captured_stderr
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yield
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$stdout.rewind
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$stderr.rewind
|
|
|
|
return captured_stdout.read, captured_stderr.read
|
|
ensure
|
|
$stdout.reopen orig_stdout
|
|
$stderr.reopen orig_stderr
|
|
|
|
orig_stdout.close
|
|
orig_stderr.close
|
|
captured_stdout.close!
|
|
captured_stderr.close!
|
|
end
|
|
end
|
|
end
|
|
|
|
##
|
|
# Returns details for exception +e+
|
|
|
|
def exception_details e, msg
|
|
[
|
|
"#{msg}",
|
|
"Class: <#{e.class}>",
|
|
"Message: <#{e.message.inspect}>",
|
|
"---Backtrace---",
|
|
"#{Minitest.filter_backtrace(e.backtrace).join("\n")}",
|
|
"---------------",
|
|
].join "\n"
|
|
end
|
|
|
|
##
|
|
# Fails after a given date (in the local time zone). This allows
|
|
# you to put time-bombs in your tests if you need to keep
|
|
# something around until a later date lest you forget about it.
|
|
|
|
def fail_after y,m,d,msg
|
|
flunk msg if Time.now > Time.local(y, m, d)
|
|
end
|
|
|
|
##
|
|
# Fails with +msg+.
|
|
|
|
def flunk msg = nil
|
|
msg ||= "Epic Fail!"
|
|
assert false, msg
|
|
end
|
|
|
|
##
|
|
# Returns a proc that will output +msg+ along with the default message.
|
|
|
|
def message msg = nil, ending = nil, &default
|
|
proc {
|
|
msg = msg.call.chomp(".") if Proc === msg
|
|
custom_message = "#{msg}.\n" unless msg.nil? or msg.to_s.empty?
|
|
"#{custom_message}#{default.call}#{ending || "."}"
|
|
}
|
|
end
|
|
|
|
##
|
|
# used for counting assertions
|
|
|
|
def pass _msg = nil
|
|
assert true
|
|
end
|
|
|
|
##
|
|
# Fails if +test+ is truthy.
|
|
|
|
def refute test, msg = nil
|
|
msg ||= message { "Expected #{mu_pp(test)} to not be truthy" }
|
|
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
|
|
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 = UNDEFINED, msg = nil
|
|
return refute_predicate o1, op, msg if UNDEFINED == o2
|
|
msg = message(msg) { "Expected #{mu_pp(o1)} to not be #{op} #{mu_pp(o2)}" }
|
|
refute o1.__send__(op, o2), msg
|
|
end
|
|
|
|
##
|
|
# Fails if +path+ exists.
|
|
|
|
def refute_path_exists path, msg = nil
|
|
msg = message(msg) { "Expected path '#{path}' to not exist" }
|
|
refute File.exist?(path), 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 run. If run in verbose-mode, the skipped run
|
|
# gets listed at the end of the run but doesn't cause a failure
|
|
# exit code.
|
|
|
|
def skip msg = nil, bt = caller
|
|
msg ||= "Skipped, no message given"
|
|
@skip = true
|
|
raise Minitest::Skip, msg, bt
|
|
end
|
|
|
|
##
|
|
# Skips the current run until a given date (in the local time
|
|
# zone). This allows you to put some fixes on hold until a later
|
|
# date, but still holds you accountable and prevents you from
|
|
# forgetting it.
|
|
|
|
def skip_until y,m,d,msg
|
|
skip msg if Time.now < Time.local(y, m, d)
|
|
where = caller.first.rpartition(':in').reject(&:empty?).first
|
|
warn "Stale skip_until %p at %s" % [msg, where]
|
|
end
|
|
|
|
##
|
|
# Was this testcase skipped? Meant for #teardown.
|
|
|
|
def skipped?
|
|
defined?(@skip) and @skip
|
|
end
|
|
end
|
|
end
|