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#!/usr/bin/env ruby
require File.expand_path(File.join(File.dirname(__FILE__), "test_helper"))
describe BinData::Base, "parameters" do
it "fails when parameter name is invalid" do
_ {
class InvalidParameterNameBase < BinData::Base
optional_parameter :lazy_eval # from LazyEvaluator
end
}.must_raise NameError
end
it "fails when parameter has nil value" do
_ { BinData::Base.new(a: nil) }.must_raise ArgumentError
end
end
describe BinData::Base, "#has_parameter?" do
it "true for existing parameters" do
obj = BinData::Base.new(a: 3)
assert obj.has_parameter?(:a)
end
it "false for non-existing parameters" do
obj = BinData::Base.new
refute obj.has_parameter?(:a)
end
end
describe BinData::Base, "#get_parameter" do
it "retrieves parameter values" do
obj = BinData::Base.new(a: 3)
_(obj.get_parameter(:a)).must_equal 3
end
it "retrieves parameter values with string keys" do
obj = BinData::Base.new('a' => 3)
_(obj.get_parameter(:a)).must_equal 3
end
it "returns nil for non existing parameters" do
obj = BinData::Base.new
_(obj.get_parameter(:a)).must_be_nil
end
it "wont eval parameters" do
obj = BinData::Base.new(a: -> { 3 })
assert_kind_of Proc, obj.get_parameter(:a)
end
end
describe BinData::Base, "#eval_parameter" do
it "evals the parameter" do
obj = BinData::Base.new(a: -> { 3 })
_(obj.eval_parameter(:a)).must_equal 3
end
it "returns nil for a non existing parameter" do
obj = BinData::Base.new
_(obj.eval_parameter(:a)).must_be_nil
end
end
describe BinData::Base, ".mandatory_parameters" do
class MandatoryBase < BinData::Base
mandatory_parameter :p1
mandatory_parameter :p2
end
it "fails when not all mandatory parameters are present" do
params = {p1: "a", xx: "b" }
_ { MandatoryBase.new(params) }.must_raise ArgumentError
end
it "fails when no mandatory parameters are present" do
_ { MandatoryBase.new() }.must_raise ArgumentError
end
end
describe BinData::Base, ".default_parameters" do
class DefaultBase < BinData::Base
default_parameter p1: "a"
end
it "uses default parameters when not specified" do
obj = DefaultBase.new
_(obj.eval_parameter(:p1)).must_equal "a"
end
it "can override default parameters" do
obj = DefaultBase.new(p1: "b")
_(obj.eval_parameter(:p1)).must_equal "b"
end
end
describe BinData::Base, ".mutually_exclusive_parameters" do
class MutexParamBase < BinData::Base
optional_parameters :p1, :p2, :p3
mutually_exclusive_parameters :p1, :p2, :p3
end
it "fails when any two of those parameters are present" do
_ { MutexParamBase.new(p1: "a", p2: "b") }.must_raise ArgumentError
_ { MutexParamBase.new(p1: "a", p3: "c") }.must_raise ArgumentError
_ { MutexParamBase.new(p2: "b", p3: "c") }.must_raise ArgumentError
end
end
describe BinData::Base, "subclassing" do
class ParamLevel1Base < BinData::Base
optional_parameter :p1
end
class ParamLevel2Base < ParamLevel1Base
optional_parameter :p2
end
it "inherits parameters" do
accepted = ParamLevel2Base.accepted_parameters.all
_(accepted).must_include :p1
_(accepted).must_include :p2
end
end
describe BinData::Base, "subclassing when skipping a level" do
class ParamLevel1Base < BinData::Base
optional_parameter :p1
end
class ParamLevel2Base < ParamLevel1Base
end
class ParamLevel3Base < ParamLevel2Base
optional_parameter :p2
end
it "inherits parameters" do
accepted = ParamLevel3Base.accepted_parameters.all
_(accepted).must_include :p1
_(accepted).must_include :p2
end
end
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