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#!/usr/bin/env ruby
require File.expand_path(File.join(File.dirname(__FILE__), "test_helper"))
describe BinData::CountBytesRemaining do
let(:obj) { BinData::CountBytesRemaining.new }
it "initial state" do
_(obj).must_equal 0
_(obj.num_bytes).must_equal 0
end
it "counts till end of stream" do
data = "abcdefghij"
_(obj.read(data)).must_equal 10
end
it "does not read any data" do
io = StringIO.new "abcdefghij"
obj.read(io)
_(io.pos).must_equal 0
end
it "does not write any data" do
_(obj.to_binary_s).must_equal_binary ""
end
it "allows setting value for completeness" do
obj.assign("123")
_(obj).must_equal "123"
_(obj.to_binary_s).must_equal_binary ""
end
it "accepts BinData::BasePrimitive parameters" do
count = BinData::CountBytesRemaining.new(assert: 2)
_ {
count.read("xyz")
}.must_raise BinData::ValidityError
end
end
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