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#!/usr/bin/env ruby -w
require 'rmagick'
require 'test/unit'
require 'test/unit/ui/console/testrunner' unless RUBY_VERSION[/^1\.9|^2/]
class Image1_UT < Test::Unit::TestCase
FreezeError = RUBY_VERSION[/^1\.9|^2/] ? RuntimeError : TypeError
def setup
@img = Magick::Image.new(20, 20)
end
def test_read_inline
img = Magick::Image.read(IMAGES_DIR+'/Button_0.gif').first
blob = img.to_blob
encoded = [blob].pack('m*')
res = Magick::Image.read_inline(encoded)
assert_instance_of(Array, res)
assert_instance_of(Magick::Image, res[0])
assert_equal(img, res[0])
end
def test_spaceship
img0 = Magick::Image.read(IMAGES_DIR+'/Button_0.gif').first
img1 = Magick::Image.read(IMAGES_DIR+'/Button_1.gif').first
sig0 = img0.signature
sig1 = img1.signature
# since <=> is based on the signature, the images should
# have the same relationship to each other as their
# signatures have to each other.
assert_equal(sig0 <=> sig1, img0 <=> img1)
assert_equal(sig1 <=> sig0, img1 <=> img0)
assert_equal(img0, img0)
assert_not_equal(img0, img1)
end
def test_adaptive_blur
assert_nothing_raised do
res = @img.adaptive_blur
assert_instance_of(Magick::Image, res)
end
assert_nothing_raised { @img.adaptive_blur(2) }
assert_nothing_raised { @img.adaptive_blur(3, 2) }
assert_raise(ArgumentError) { @img.adaptive_blur(3, 2, 2) }
end
def test_adaptive_blur_channel
assert_nothing_raised do
res = @img.adaptive_blur_channel
assert_instance_of(Magick::Image, res)
end
assert_nothing_raised { @img.adaptive_blur_channel(2) }
assert_nothing_raised { @img.adaptive_blur_channel(3, 2) }
assert_nothing_raised { @img.adaptive_blur_channel(3, 2, Magick::RedChannel) }
assert_nothing_raised { @img.adaptive_blur_channel(3, 2, Magick::RedChannel, Magick::BlueChannel) }
assert_raise(ArgumentError) { @img.adaptive_blur(3, 2, 2) }
end
def test_adaptive_resize
assert_nothing_raised do
res = @img.adaptive_resize(10,10)
assert_instance_of(Magick::Image, res)
end
assert_nothing_raised { @img.adaptive_resize(2) }
assert_raise(ArgumentError) { @img.adaptive_resize(10,10,10) }
assert_raise(ArgumentError) { @img.adaptive_resize }
end
def test_adaptive_sharpen
assert_nothing_raised do
res = @img.adaptive_sharpen
assert_instance_of(Magick::Image, res)
end
assert_nothing_raised { @img.adaptive_sharpen(2) }
assert_nothing_raised { @img.adaptive_sharpen(3, 2) }
assert_raise(ArgumentError) { @img.adaptive_sharpen(3, 2, 2) }
end
def test_adaptive_sharpen_channel
assert_nothing_raised do
res = @img.adaptive_sharpen_channel
assert_instance_of(Magick::Image, res)
end
assert_nothing_raised { @img.adaptive_sharpen_channel(2) }
assert_nothing_raised { @img.adaptive_sharpen_channel(3, 2) }
assert_nothing_raised { @img.adaptive_sharpen_channel(3, 2, Magick::RedChannel) }
assert_nothing_raised { @img.adaptive_sharpen_channel(3, 2, Magick::RedChannel, Magick::BlueChannel) }
assert_raise(ArgumentError) { @img.adaptive_sharpen(3, 2, 2) }
end
def test_adaptive_threshold
assert_nothing_raised do
res = @img.adaptive_threshold
assert_instance_of(Magick::Image, res)
end
assert_nothing_raised { @img.adaptive_threshold(2) }
assert_nothing_raised { @img.adaptive_threshold(2,4) }
assert_nothing_raised { @img.adaptive_threshold(2,4,1) }
assert_raise(ArgumentError) { @img.adaptive_threshold(2,4,1,2) }
end
def test_add_compose_mask
mask = Magick::Image.new(20,20)
assert_nothing_raised { @img.add_compose_mask(mask) }
assert_nothing_raised { @img.delete_compose_mask }
assert_nothing_raised { @img.add_compose_mask(mask) }
assert_nothing_raised { @img.add_compose_mask(mask) }
assert_nothing_raised { @img.delete_compose_mask }
assert_nothing_raised { @img.delete_compose_mask }
end
def test_add_noise
assert_nothing_raised { @img.add_noise(Magick::UniformNoise) }
assert_nothing_raised { @img.add_noise(Magick::GaussianNoise) }
assert_nothing_raised { @img.add_noise(Magick::MultiplicativeGaussianNoise) }
assert_nothing_raised { @img.add_noise(Magick::ImpulseNoise) }
assert_nothing_raised { @img.add_noise(Magick::LaplacianNoise) }
assert_nothing_raised { @img.add_noise(Magick::PoissonNoise) }
assert_raise(TypeError) { @img.add_noise(0) }
end
def test_add_noise_channel
assert_nothing_raised { @img.add_noise_channel(Magick::UniformNoise) }
assert_nothing_raised { @img.add_noise_channel(Magick::UniformNoise, Magick::RedChannel) }
assert_nothing_raised { @img.add_noise_channel(Magick::GaussianNoise, Magick::BlueChannel) }
assert_nothing_raised { @img.add_noise_channel(Magick::ImpulseNoise, Magick::GreenChannel) }
assert_nothing_raised { @img.add_noise_channel(Magick::LaplacianNoise, Magick::RedChannel, Magick::GreenChannel) }
assert_nothing_raised { @img.add_noise_channel(Magick::PoissonNoise, Magick::RedChannel, Magick::GreenChannel, Magick::BlueChannel) }
# Not a NoiseType
assert_raise(TypeError) { @img.add_noise_channel(1) }
# Not a ChannelType
assert_raise(TypeError) { @img.add_noise_channel(Magick::UniformNoise, Magick::RedChannel, 1) }
# Too few arguments
assert_raise(ArgumentError) { @img.add_noise_channel }
end
def add_delete_profile
img = Magick::Image.read('cmyk.jpg'),first
assert_nothing_raised { img.add_profile('cmyk.icm') }
assert_nothing_raised { img.add_profile('srgb.icm') }
img.each_profile { |name, value| assert_equal('icc', name) }
assert_nothing_raised { img.delete_profile('icc') }
end
def test_affine_matrix
affine = Magick::AffineMatrix.new(1, Math::PI/6, Math::PI/6, 1, 0, 0)
assert_nothing_raised { @img.affine_transform(affine) }
assert_raise(TypeError) { @img.affine_transform(0) }
res = @img.affine_transform(affine)
assert_instance_of(Magick::Image, res)
end
# test alpha backward compatibility. Image#alpha w/o arguments acts like alpha?
def test_alpha_compat
assert_nothing_raised { @img.alpha }
assert !@img.alpha
assert_nothing_raised { @img.alpha Magick::ActivateAlphaChannel }
assert @img.alpha
end
def test_alpha
assert_nothing_raised { @img.alpha? }
assert !@img.alpha?
assert_nothing_raised { @img.alpha Magick::ActivateAlphaChannel }
assert @img.alpha?
assert_nothing_raised { @img.alpha Magick::DeactivateAlphaChannel }
assert !@img.alpha?
assert_nothing_raised { @img.alpha Magick::ResetAlphaChannel }
assert_nothing_raised { @img.alpha Magick::SetAlphaChannel }
@img.freeze
assert_raise(FreezeError) { @img.alpha Magick::SetAlphaChannel }
end
def test_auto_gamma
res = nil
assert_nothing_raised { res = @img.auto_gamma_channel }
assert_instance_of(Magick::Image, res)
assert_not_same(@img, res)
assert_nothing_raised { res = @img.auto_gamma_channel Magick::RedChannel }
assert_nothing_raised { res = @img.auto_gamma_channel Magick::RedChannel, Magick::BlueChannel }
assert_raise(TypeError) { @img.auto_gamma_channel(1) }
end
def test_auto_level
res = nil
assert_nothing_raised { res = @img.auto_level_channel }
assert_instance_of(Magick::Image, res)
assert_not_same(@img, res)
assert_nothing_raised { res = @img.auto_level_channel Magick::RedChannel }
assert_nothing_raised { res = @img.auto_level_channel Magick::RedChannel, Magick::BlueChannel }
assert_raise(TypeError) { @img.auto_level_channel(1) }
end
def test_auto_orient
assert_nothing_raised do
res = @img.auto_orient
assert_instance_of(Magick::Image, res)
assert_not_same(@img, res)
end
assert_nothing_raised do
res = @img.auto_orient!
# When not changed, returns nil
assert_nil(res)
end
end
def test_bilevel_channel
assert_raise(ArgumentError) { @img.bilevel_channel }
assert_nothing_raised { @img.bilevel_channel(100) }
assert_nothing_raised { @img.bilevel_channel(100, Magick::RedChannel) }
assert_nothing_raised { @img.bilevel_channel(100, Magick::RedChannel, Magick::BlueChannel, Magick::GreenChannel, Magick::OpacityChannel) }
assert_nothing_raised { @img.bilevel_channel(100, Magick::CyanChannel, Magick::MagentaChannel, Magick::YellowChannel, Magick::BlackChannel) }
assert_nothing_raised { @img.bilevel_channel(100, Magick::GrayChannel) }
assert_nothing_raised { @img.bilevel_channel(100, Magick::AllChannels) }
assert_raise(TypeError) { @img.bilevel_channel(100, 2) }
res = @img.bilevel_channel(100)
assert_instance_of(Magick::Image, res)
end
def test_blend
@img2 = Magick::Image.new(20,20) {self.background_color = 'black'}
assert_nothing_raised { @img.blend(@img2, 0.25) }
res = @img.blend(@img2, 0.25)
assert_instance_of(Magick::Image, res)
assert_nothing_raised { @img.blend(@img2, '25%') }
assert_nothing_raised { @img.blend(@img2, 0.25, 0.75) }
assert_nothing_raised { @img.blend(@img2, '25%', '75%') }
assert_nothing_raised { @img.blend(@img2, 0.25, 0.75, Magick::CenterGravity) }
assert_nothing_raised { @img.blend(@img2, 0.25, 0.75, Magick::CenterGravity, 10) }
assert_nothing_raised { @img.blend(@img2, 0.25, 0.75, Magick::CenterGravity, 10, 10) }
assert_raise(ArgumentError) { @img.blend }
assert_raise(ArgumentError) { @img.blend(@img2, 'x') }
assert_raise(TypeError) { @img.blend(@img2, 0.25, []) }
assert_raise(TypeError) { @img.blend(@img2, 0.25, 0.75, 'x') }
assert_raise(TypeError) { @img.blend(@img2, 0.25, 0.75, Magick::CenterGravity, 'x') }
assert_raise(TypeError) { @img.blend(@img2, 0.25, 0.75, Magick::CenterGravity, 10, []) }
@img2.destroy!
assert_raise(Magick::DestroyedImageError) { @img.blend(@img2, '25%') }
end
def test_blur_channel
assert_nothing_raised { @img.blur_channel }
assert_nothing_raised { @img.blur_channel(1) }
assert_nothing_raised { @img.blur_channel(1,2) }
assert_nothing_raised { @img.blur_channel(1,2, Magick::RedChannel) }
assert_nothing_raised { @img.blur_channel(1,2, Magick::RedChannel, Magick::BlueChannel, Magick::GreenChannel, Magick::OpacityChannel) }
assert_nothing_raised { @img.blur_channel(1,2, Magick::CyanChannel, Magick::MagentaChannel, Magick::YellowChannel, Magick::BlackChannel) }
assert_nothing_raised { @img.blur_channel(1,2, Magick::GrayChannel) }
assert_nothing_raised { @img.blur_channel(1,2, Magick::AllChannels) }
assert_raise(TypeError) { @img.blur_channel(1,2,2) }
res = @img.blur_channel
assert_instance_of(Magick::Image, res)
end
def test_blur_image
assert_nothing_raised { @img.blur_image }
assert_nothing_raised { @img.blur_image(1) }
assert_nothing_raised { @img.blur_image(1,2) }
assert_raise(ArgumentError) { @img.blur_image(1,2,3) }
res = @img.blur_image
assert_instance_of(Magick::Image, res)
end
def test_black_threshold
assert_raise(ArgumentError) { @img.black_threshold }
assert_nothing_raised { @img.black_threshold(50) }
assert_nothing_raised { @img.black_threshold(50, 50) }
assert_nothing_raised { @img.black_threshold(50, 50, 50) }
assert_nothing_raised { @img.black_threshold(50, 50, 50, 50) }
assert_raise(ArgumentError) { @img.black_threshold(50, 50, 50, 50, 50) }
res = @img.black_threshold(50)
assert_instance_of(Magick::Image, res)
end
def test_border
assert_nothing_raised { @img.border(2, 2, 'red') }
assert_nothing_raised { @img.border!(2, 2, 'red') }
res = @img.border(2,2, 'red')
assert_instance_of(Magick::Image, res)
@img.freeze
assert_raise(FreezeError) { @img.border!(2,2, 'red') }
end
def test_change_geometry
assert_raise(ArgumentError) { @img.change_geometry('sss') }
assert_raise(LocalJumpError) { @img.change_geometry('100x100') }
assert_nothing_raised do
res = @img.change_geometry('100x100') { 1 }
assert_equal(1, res)
end
assert_raise(ArgumentError) { @img.change_geometry([]) }
end
def test_changed?
# assert_block { !@img.changed? }
# @img.pixel_color(0,0,'red')
# assert_block { @img.changed? }
end
def test_channel
assert_nothing_raised { @img.channel(Magick::RedChannel) }
assert_nothing_raised { @img.channel(Magick::BlueChannel) }
assert_nothing_raised { @img.channel(Magick::GreenChannel) }
assert_nothing_raised { @img.channel(Magick::OpacityChannel) }
assert_nothing_raised { @img.channel(Magick::MagentaChannel) }
assert_nothing_raised { @img.channel(Magick::CyanChannel) }
assert_nothing_raised { @img.channel(Magick::YellowChannel) }
assert_nothing_raised { @img.channel(Magick::BlackChannel) }
assert_nothing_raised { @img.channel(Magick::GrayChannel) }
assert_nothing_raised { @img.channel(Magick::AlphaChannel) }
assert_nothing_raised { @img.channel(Magick::DefaultChannels) }
assert_nothing_raised { @img.channel(Magick::HueChannel) }
assert_nothing_raised { @img.channel(Magick::LuminosityChannel) }
assert_nothing_raised { @img.channel(Magick::SaturationChannel) }
assert_instance_of(Magick::Image, @img.channel(Magick::RedChannel))
assert_raise(TypeError) { @img.channel(2) }
end
def test_channel_depth
assert_nothing_raised { @img.channel_depth }
assert_nothing_raised { @img.channel_depth(Magick::RedChannel) }
assert_nothing_raised { @img.channel_depth(Magick::RedChannel, Magick::BlueChannel) }
assert_nothing_raised { @img.channel_depth(Magick::GreenChannel, Magick::OpacityChannel) }
assert_nothing_raised { @img.channel_depth(Magick::MagentaChannel, Magick::CyanChannel) }
assert_nothing_raised { @img.channel_depth(Magick::CyanChannel, Magick::BlackChannel) }
assert_nothing_raised { @img.channel_depth(Magick::GrayChannel) }
assert_raise(TypeError) { @img.channel_depth(2) }
assert_instance_of(Fixnum, @img.channel_depth(Magick::RedChannel))
end
def test_channel_extrema
assert_nothing_raised do
res = @img.channel_extrema
assert_instance_of(Array, res)
assert_equal(2, res.length)
assert_kind_of(Integer, res[0])
assert_kind_of(Integer, res[1])
end
assert_nothing_raised { @img.channel_extrema(Magick::RedChannel) }
assert_nothing_raised { @img.channel_extrema(Magick::RedChannel, Magick::BlueChannel) }
assert_nothing_raised { @img.channel_extrema(Magick::GreenChannel, Magick::OpacityChannel) }
assert_nothing_raised { @img.channel_extrema(Magick::MagentaChannel, Magick::CyanChannel) }
assert_nothing_raised { @img.channel_extrema(Magick::CyanChannel, Magick::BlackChannel) }
assert_nothing_raised { @img.channel_extrema(Magick::GrayChannel) }
assert_raise(TypeError) { @img.channel_extrema(2) }
end
def test_channel_mean
assert_nothing_raised do
res = @img.channel_mean
assert_instance_of(Array, res)
assert_equal(2, res.length)
assert_instance_of(Float, res[0])
assert_instance_of(Float, res[1])
end
assert_nothing_raised { @img.channel_mean(Magick::RedChannel) }
assert_nothing_raised { @img.channel_mean(Magick::RedChannel, Magick::BlueChannel) }
assert_nothing_raised { @img.channel_mean(Magick::GreenChannel, Magick::OpacityChannel) }
assert_nothing_raised { @img.channel_mean(Magick::MagentaChannel, Magick::CyanChannel) }
assert_nothing_raised { @img.channel_mean(Magick::CyanChannel, Magick::BlackChannel) }
assert_nothing_raised { @img.channel_mean(Magick::GrayChannel) }
assert_raise(TypeError) { @img.channel_mean(2) }
end
def test_charcoal
assert_nothing_raised do
res = @img.charcoal
assert_instance_of(Magick::Image, res)
end
assert_nothing_raised { @img.charcoal(1.0) }
assert_nothing_raised { @img.charcoal(1.0, 2.0) }
assert_raise(ArgumentError) { @img.charcoal(1.0, 2.0, 3.0) }
end
def test_chop
assert_nothing_raised do
res = @img.chop(10, 10, 10, 10)
assert_instance_of(Magick::Image, res)
end
end
def test_clone
assert_nothing_raised do
res = @img.clone
assert_instance_of(Magick::Image, res)
assert_equal(res, @img)
end
res = @img.clone
assert_equal(res.frozen?, @img.frozen?)
@img.freeze
res = @img.clone
assert_equal(res.frozen?, @img.frozen?)
end
def test_clut_channel
img = Magick::Image.new(20,20) {self.colorspace = Magick::GRAYColorspace}
clut = Magick::Image.new(20,1) {self.background_color = 'red'}
res = nil
assert_nothing_raised {res = img.clut_channel(clut)}
assert_same(res, img)
assert_nothing_raised { img.clut_channel(clut, Magick::RedChannel) }
assert_nothing_raised { img.clut_channel(clut, Magick::RedChannel, Magick::BlueChannel) }
assert_raises(ArgumentError) { img.clut_channel(clut, 1, Magick::RedChannel) }
end
def test_color_fill_to_border
assert_raise(ArgumentError) { @img.color_fill_to_border(-1, 1, 'red') }
assert_raise(ArgumentError) { @img.color_fill_to_border(1, 100, 'red') }
assert_nothing_raised do
res = @img.color_fill_to_border(@img.columns/2, @img.rows/2, 'red')
assert_instance_of(Magick::Image, res)
end
pixel = Magick::Pixel.new(Magick::QuantumRange)
assert_nothing_raised { @img.color_fill_to_border(@img.columns/2, @img.rows/2, pixel) }
end
def test_color_floodfill
assert_raise(ArgumentError) { @img.color_floodfill(-1, 1, 'red') }
assert_raise(ArgumentError) { @img.color_floodfill(1, 100, 'red') }
assert_nothing_raised do
res = @img.color_floodfill(@img.columns/2, @img.rows/2, 'red')
assert_instance_of(Magick::Image, res)
end
pixel = Magick::Pixel.new(Magick::QuantumRange)
assert_nothing_raised { @img.color_floodfill(@img.columns/2, @img.rows/2, pixel) }
end
def test_color_histogram
assert_nothing_raised do
res = @img.color_histogram
assert_instance_of(Hash, res)
end
end
def test_colorize
assert_nothing_raised do
res = @img.colorize(0.25, 0.25, 0.25, 'red')
assert_instance_of(Magick::Image, res)
end
assert_nothing_raised { @img.colorize(0.25, 0.25, 0.25, 0.25, 'red') }
pixel = Magick::Pixel.new(Magick::QuantumRange)
assert_nothing_raised { @img.colorize(0.25, 0.25, 0.25, pixel) }
assert_nothing_raised { @img.colorize(0.25, 0.25, 0.25, 0.25, pixel) }
assert_raise(ArgumentError) { @img.colorize }
assert_raise(ArgumentError) { @img.colorize(0.25) }
assert_raise(ArgumentError) { @img.colorize(0.25, 0.25) }
assert_raise(ArgumentError) { @img.colorize(0.25, 0.25, 0.25) }
assert_raise(ArgumentError) { @img.colorize(0.25, 0.25, 0.25, 'X') }
# last argument must be a color name or pixel
assert_raise(TypeError) { @img.colorize(0.25, 0.25, 0.25, 0.25) }
assert_raise(ArgumentError) { @img.colorize(0.25, 0.25, 0.25, 0.25, 'X') }
assert_raise(TypeError) { @img.colorize(0.25, 0.25, 0.25, 0.25, [2]) }
end
def test_colormap
# IndexError b/c @img is DirectClass
assert_raise(IndexError) { @img.colormap(0) }
# Read PseudoClass image
pc_img = Magick::Image.read(IMAGES_DIR+'/Button_0.gif').first
assert_nothing_raised { pc_img.colormap(0) }
ncolors = pc_img.colors
assert_raise(IndexError) { pc_img.colormap(ncolors+1) }
assert_raise(IndexError) { pc_img.colormap(-1) }
assert_nothing_raised { pc_img.colormap(ncolors-1) }
res = pc_img.colormap(0)
assert_instance_of(String, res)
#test 'set' operation
assert_nothing_raised do
old_color = pc_img.colormap(0)
res = pc_img.colormap(0, 'red')
assert_equal(old_color, res)
res = pc_img.colormap(0)
assert_equal('red', res)
end
pixel = Magick::Pixel.new(Magick::QuantumRange)
assert_nothing_raised { pc_img.colormap(0, pixel) }
assert_raise(TypeError) { pc_img.colormap(0, [2]) }
pc_img.freeze
assert_raise(FreezeError) { pc_img.colormap(0, 'red') }
end
def test_color_point
assert_nothing_raised do
res = @img.color_point(0, 0, 'red')
assert_instance_of(Magick::Image, res)
assert_not_same(@img, res)
end
pixel = Magick::Pixel.new(Magick::QuantumRange)
assert_nothing_raised { @img.color_point(0, 0, pixel) }
end
def test_color_reset!
assert_nothing_raised do
res = @img.color_reset!('red')
assert_same(@img, res)
end
pixel = Magick::Pixel.new(Magick::QuantumRange)
assert_nothing_raised { @img.color_reset!(pixel) }
assert_raise(TypeError) { @img.color_reset!([2]) }
assert_raise(ArgumentError) { @img.color_reset!('x') }
@img.freeze
assert_raise(FreezeError) { @img.color_reset!('red') }
end
def test_combine
r = Magick::Image.new(20,20) { self.background_color = 'red' }
g = Magick::Image.new(20,20) { self.background_color = 'green' }
b = Magick::Image.new(20,20) { self.background_color = 'blue' }
a = Magick::Image.new(20,20) { self.background_color = 'transparent' }
assert_nothing_raised { Magick::Image.combine(r) }
assert_nothing_raised { Magick::Image.combine(r, g) }
assert_nothing_raised { Magick::Image.combine(r, g, b) }
assert_nothing_raised { Magick::Image.combine(r, g, b, a) }
assert_nothing_raised { Magick::Image.combine(nil, g) }
assert_nothing_raised { Magick::Image.combine(r, nil, b) }
assert_nothing_raised { Magick::Image.combine(r, g, nil, a) }
assert_nothing_raised { Magick::Image.combine(r, g, b, nil) }
res = Magick::Image.combine(r, g, b)
assert_instance_of(Magick::Image, res)
assert_raise(ArgumentError) { Magick::Image.combine }
assert_raise(ArgumentError) { Magick::Image.combine(nil) }
assert_raise(ArgumentError) { Magick::Image.combine(r, g, b, a, r) }
assert_raise(TypeError) { Magick::Image.combine(1, g, b, a) }
end
def test_compare_channel
img1 = Magick::Image.read(IMAGES_DIR+'/Button_0.gif').first
img2 = Magick::Image.read(IMAGES_DIR+'/Button_1.gif').first
assert_nothing_raised { img1.compare_channel(img2, Magick::MeanAbsoluteErrorMetric) }
assert_nothing_raised { img1.compare_channel(img2, Magick::MeanSquaredErrorMetric) }
assert_nothing_raised { img1.compare_channel(img2, Magick::PeakAbsoluteErrorMetric) }
assert_nothing_raised { img1.compare_channel(img2, Magick::PeakSignalToNoiseRatioMetric) }
assert_nothing_raised { img1.compare_channel(img2, Magick::RootMeanSquaredErrorMetric) }
assert_raise(TypeError) { img1.compare_channel(img2, 2) }
assert_raise(ArgumentError) { img1.compare_channel }
ilist = Magick::ImageList.new
ilist << img2
assert_nothing_raised { img1.compare_channel(ilist, Magick::MeanAbsoluteErrorMetric) }
assert_nothing_raised { img1.compare_channel(img2, Magick::MeanAbsoluteErrorMetric, Magick::RedChannel) }
assert_nothing_raised { img1.compare_channel(img2, Magick::MeanAbsoluteErrorMetric, Magick::RedChannel, Magick::BlueChannel) }
assert_raise(TypeError) { img1.compare_channel(img2, Magick::MeanAbsoluteErrorMetric, 2) }
assert_raise(TypeError) { img1.compare_channel(img2, Magick::MeanAbsoluteErrorMetric, Magick::RedChannel, 2) }
res = img1.compare_channel(img2, Magick::MeanAbsoluteErrorMetric)
assert_instance_of(Array, res)
assert_instance_of(Magick::Image, res[0])
assert_instance_of(Float, res[1])
img2.destroy!
assert_raise(Magick::DestroyedImageError) { img1.compare_channel(img2, Magick::MeanAbsoluteErrorMetric) }
end
end
if __FILE__ == $PROGRAM_NAME
IMAGES_DIR = '../doc/ex/images'
FILES = Dir[IMAGES_DIR+'/Button_*.gif']
Test::Unit::UI::Console::TestRunner.run(Image1_UT) unless RUBY_VERSION[/^1\.9|^2/]
end