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#!/usr/bin/env ruby
require File.expand_path(File.join(File.dirname(__FILE__), "test_helper"))
describe BinData::Virtual do
let(:stream) { StringIO.new "abcdefghij" }
it "must not read from any stream" do
BinData::Virtual.read(stream)
_(stream.pos).must_equal 0
end
it "must not write to a stream" do
obj = BinData::Virtual.new
_(obj.to_binary_s).must_equal_binary ""
end
it "occupies no space" do
obj = BinData::Virtual.new
_(obj.num_bytes).must_equal 0
end
it "asserts on #read" do
data = []
obj = BinData::Virtual.new(assert: -> { data << 1; true })
obj.read ""
_(data).must_equal [1]
end
it "asserts on #assign" do
data = []
obj = BinData::Virtual.new(assert: -> { data << 1; true })
obj.assign("foo")
_(data).must_equal [1]
end
it "assigns a value" do
obj = BinData::Virtual.new(3)
_(obj).must_equal 3
end
it "accepts the :value parameter" do
obj = BinData::Virtual.new(value: 3)
_(obj).must_equal 3
end
end
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