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common.rb
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common.rb
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# -*- coding: utf-8 -*-
module NyanCat
module Common
ESC = "\e["
NND = "#{ESC}0m"
PASS = '='
PASS_ARY = ['-', '_']
FAIL = '*'
ERROR = '!'
PENDING = '+'
VT100_CODES =
{
:black => 30,
:red => 31,
:green => 32,
:yellow => 33,
:blue => 34,
:magenta => 35,
:cyan => 36,
:white => 37,
:bold => 1,
}
VT100_CODE_VALUES = VT100_CODES.invert
def self.included(base)
base.class_eval do
attr_reader :current, :example_results, :color_index, :pending_count, :failure_count,
:example_count
end
end
# Increments the example count and displays the current progress
#
# @returns nothing
def tick(mark = PASS)
@example_results << mark
@current = (@current > @example_count) ? @example_count : @current + 1
dump_progress
end
# Determine which Ascii Nyan Cat to display. If tests are complete,
# Nyan Cat goes to sleep. If there are failing or pending examples,
# Nyan Cat is concerned.
#
# @return [String] Nyan Cat
def nyan_cat
if self.failed_or_pending? && self.finished?
ascii_cat('x')[@color_index%2].join("\n") #'~|_(x.x)'
elsif self.failed_or_pending?
ascii_cat('o')[@color_index%2].join("\n") #'~|_(o.o)'
elsif self.finished?
ascii_cat('-')[@color_index%2].join("\n") # '~|_(-.-)'
else
ascii_cat('^')[@color_index%2].join("\n") # '~|_(^.^)'
end
end
# Displays the current progress in all Nyan Cat glory
#
# @return nothing
def dump_progress
output.print(progress_lines.join("\n") + eol)
end
def progress_lines
[
nyan_trail.split("\n").each_with_index.inject([]) do |result, (trail, index)|
value = "#{scoreboard[index]}/#{@example_count}:"
result << format("%s %s", value, trail)
end
].flatten
end
# Determines how we end the trail line. If complete, return a newline etc.
#
# @return [String]
def eol
return "\n" if @current == @example_count
length = progress_lines.length - 1
length > 0 ? format("\e[1A" * length + "\r") : "\r"
end
# Calculates the current flight length
#
# @return [Fixnum]
def current_width
# padding_width + example_width + cat_length
padding_width + (@current * example_width) + cat_length
end
# Gets the padding for the current example count
#
# @return [Fixnum]
def padding_width
@example_count.to_s.length * 2 + 6
end
# A Unix trick using stty to get the console columns
#
# @return [Fixnum]
def terminal_width
if defined? JRUBY_VERSION
default_width = 80
else
default_width = `stty size`.split.map { |x| x.to_i }.reverse.first - 1
end
@terminal_width ||= default_width
end
# Creates a data store of pass, failed, and pending example results
# We have to pad the results here because sprintf can't properly pad color
#
# @return [Array]
def scoreboard
@pending_examples ||= []
@failed_examples ||= []
padding = @example_count.to_s.length
[ @current.to_s.rjust(padding),
success_color((@current - @pending_examples.size - @failed_examples.size).to_s.rjust(padding)),
pending_color(@pending_examples.size.to_s.rjust(padding)),
failure_color(@failed_examples.size.to_s.rjust(padding)) ]
end
# Creates a rainbow trail
#
# @return [String] the sprintf format of the Nyan cat
def nyan_trail
marks = @example_results.each_with_index.map{ |mark, i| highlight(mark) * example_width(i) }
marks.shift(current_width - terminal_width) if current_width >= terminal_width
nyan_cat.split("\n").each_with_index.map do |line, index|
format("%s#{line}", marks.join)
end.join("\n")
end
# Times a mark has to be repeated
def example_width(item = 1)
1
end
# Ascii version of Nyan cat. Two cats in the array allow Nyan to animate running.
#
# @param o [String] Nyan's eye
# @return [Array] Nyan cats
def ascii_cat(o = '^')
[[ "_,------, ",
"_| /\\_/\\ ",
"~|_( #{o} .#{o}) ",
" \"\" \"\" "
],
[ "_,------, ",
"_| /\\_/\\",
"^|__( #{o} .#{o}) ",
" \" \" \" \""
]]
end
# Colorizes the string with raindow colors of the rainbow
#
# @params string [String]
# @return [String]
def rainbowify(string)
c = colors[@color_index % colors.size]
@color_index += 1
"#{ESC}38;5;#{c}m#{string}#{NND}"
end
# Calculates the colors of the rainbow
#
# @return [Array]
def colors
@colors ||= (0...(6 * 7)).map do |n|
pi_3 = Math::PI / 3
n *= 1.0 / 6
r = (3 * Math.sin(n ) + 3).to_i
g = (3 * Math.sin(n + 2 * pi_3) + 3).to_i
b = (3 * Math.sin(n + 4 * pi_3) + 3).to_i
36 * r + 6 * g + b + 16
end
end
# Determines how to color the example. If pass, it is rainbowified, otherwise
# we assign red if failed or yellow if an error occurred.
#
# @return [String]
def highlight(mark = PASS)
case mark
when PASS; rainbowify PASS_ARY[@color_index%2]
when FAIL; "\e[31m#{mark}\e[0m"
when ERROR; "\e[33m#{mark}\e[0m"
when PENDING; "\e[33m#{mark}\e[0m"
else mark
end
end
# Converts a float of seconds into a minutes/seconds string
#
# @return [String]
def format_duration(duration)
seconds = ((duration % 60) * 100.0).round / 100.0 # 1.8.7 safe .round(2)
seconds = seconds.to_i if seconds.to_i == seconds # drop that zero if it's not needed
message = "#{seconds} second#{seconds == 1 ? "" : "s"}"
message = "#{(duration / 60).to_i} minute#{(duration / 60).to_i == 1 ? "" : "s"} and " + message if duration >= 60
message
end
# Determines if the specs have completed
#
# @returns [Boolean] true if finished; false otherwise
def finished?
(@current == @example_count)
end
# Determines if the any specs failed or are in pending state
#
# @returns [Boolean] true if failed or pending; false otherwise
def failed_or_pending?
(@failure_count.to_i > 0 || @pending_count.to_i > 0)
end
# Returns the cat length
#
# @returns [Fixnum]
def cat_length
nyan_cat.split("\n").group_by(&:size).max.first
end
def success_color(text)
wrap(text, :success)
end
def pending_color(text)
wrap(text, :pending)
end
def failure_color(text)
wrap(text, :failure)
end
def console_code_for(code_or_symbol)
if VT100_CODE_VALUES.has_key?(code_or_symbol)
code_or_symbol
else
VT100_CODES.fetch(code_or_symbol) do
console_code_for(:white)
end
end
end
def wrap(text, code_or_symbol)
if RSpec.configuration.color_enabled?
"\e[#{console_code_for(code_or_symbol)}m#{text}\e[0m"
else
text
end
end
end
end