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Versions: 20
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Contents
require 'spec_helper'
describe ChunkyPNG::Datastream do
describe '.from_io'do
it "should raise an error when loading a file with a bad signature" do
filename = resource_file('damaged_signature.png')
lambda { ChunkyPNG::Datastream.from_file(filename) }.should raise_error
end
it "should raise an error if the CRC of a chunk is incorrect" do
filename = resource_file('damaged_chunk.png')
lambda { ChunkyPNG::Datastream.from_file(filename) }.should raise_error
end
it "should not raise an error for an unsupported color depth when only reading the datastream" do
filename = resource_file('indexed_4bit.png')
lambda { ChunkyPNG::Datastream.from_file(filename) }.should_not raise_error
end
end
describe '#metadata' do
it "should load uncompressed tXTt chunks correctly" do
filename = resource_file('text_chunk.png')
ds = ChunkyPNG::Datastream.from_file(filename)
ds.metadata['Title'].should == 'My amazing icon!'
ds.metadata['Author'].should == "Willem van Bergen"
end
it "should load compressed zTXt chunks correctly" do
filename = resource_file('ztxt_chunk.png')
ds = ChunkyPNG::Datastream.from_file(filename)
ds.metadata['Title'].should == 'PngSuite'
ds.metadata['Copyright'].should == "Copyright Willem van Schaik, Singapore 1995-96"
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems