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require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
# We need to test in several different contexts, so provide the base info here.
inputs = {
[Symbol]=>{
:base => [:foo,:bar],
:match => [:baz,:bingo],
:fail => {
:one => [:zip,0],
:all => ['string',Class]
}
},
[Fixnum] => {
:base => [ 1,2,3 ],
:match => [ 17,18,19 ],
:fail => {
:one => [22,:symbol,43],
:all => ['string',:symbol]
}
},
[String,Symbol] => {
:base => ['Foo',:foo],
:match => [:bar,'Bar'],
:fail => {
:one => [:yippee,'a stirng',17],
:all => [12,Class,Array]
}
}
}
describe TypedArray do
describe '#new' do
inputs.each_pair do |accepted_types, config|
context "when only accepting <#{accepted_types.inspect}>" do
subject { TypedArray( *accepted_types ) }
context 'Form 1: typed_ary.new()' do
it "should have zero-length" do
subject.new().length.should == 0
end
it "should be empty" do
subject.new().to_a.should be_empty
end
end
context 'Form 1: typed_ary.new(size)' do
it "should have the proper length" do
subject.new(5).length.should == 5
end
it "should conatin all nil values" do
subject.new(5).to_a.should == [nil,nil,nil,nil,nil]
end
end
context 'Form 2: typed_ary.new(size,object)' do
it "should have the proper length" do
subject.new(3,config[:match].first).length.should == 3
end
it "should conatin the value specified" do
subject.new(3,config[:match].first).to_a.should == [config[:match].first]*3
end
it "should raise when obj is the wrong type" do
expect{ subject.new( 3, config[:fail][:all].first ) }.to raise_error TypedArray::UnexpectedTypeException
end
end
context 'Form 3: typed_ary.new( ary )' do
it "should accept when all items match" do
subject.new(config[:match]).to_a.should == config[:match]
end
it "should raise when one object is the wrong type" do
expect{ subject.new(config[:fail][:one])}.to raise_error TypedArray::UnexpectedTypeException
end
it "should raise when more than one object is the wrong type" do
expect{ subject.new(config[:fail][:all])}.to raise_error TypedArray::UnexpectedTypeException
end
end
context 'Form 4: typed_ary.new(size){|index|block}' do
it "should populate when block returns the right type" do
subject.new(config[:match].length){|i| config[:match][i]}.to_a.should == config[:match]
end
it "should raise when block returns wrong type once" do
expect{ subject.new(config[:fail][:one].length){|i| config[:fail][:one][i]} }.to raise_error TypedArray::UnexpectedTypeException
end
it "should raise when block returns wrong type more than once" do
expect{ subject.new(config[:fail][:all].length){|i| config[:fail][:all][i]} }.to raise_error TypedArray::UnexpectedTypeException
end
end
end
end
end
[:<<,:unshift,:push].each do |method|
context %Q{typed_ary#{('a'..'z').include?(method.to_s[0]) ? '.' : ' '}#{method.to_s} other_ary} do
inputs.each_pair do |accepted_types,config|
context "when only accepting <#{accepted_types.inspect}>" do
before :each do
@typed_ary = TypedArray( *accepted_types).new(config[:base])
@ary = config[:base].to_a
end
context "when the item being pushed matches (#{config[:match].first})" do
before :each do
@item = config[:match].first
end
it "should return as Array would return" do
@typed_ary.send(method,@item).to_a.should == @ary.send(method,@item)
end
it "should modify the TypedArray as Array would be modified" do
@typed_ary.send(method,@item)
@ary.send(method,@item)
@typed_ary.to_a.should == @ary
end
end
context "when the item being pushed does not match (#{config[:fail][:all].first})" do
before :each do
@item = config[:fail][:all].first
end
it "should raise an exception" do
expect{ @typed_ary.send(method,@item) }.to raise_error TypedArray::UnexpectedTypeException
end
it "should not modify typed_ary" do
begin
backup = @typed_ary.to_a
@typed_ary.send(method,@item)
rescue TypedArray::UnexpectedTypeException
ensure
@typed_ary.to_a.should == backup
end
end
end
end
end
end
end
[:[]=].each do |method|
context %Q{typed_ary[idx]= other_ary} do
inputs.each_pair do |accepted_types,config|
context "when only accepting <#{accepted_types.inspect}>" do
before :each do
@typed_ary = TypedArray( *accepted_types).new(config[:base])
@ary = config[:base].to_a
end
context "when the item being pushed matches (#{config[:match].first})" do
before :each do
@item = config[:match].first
end
it "should return as Array would return" do
@typed_ary.send(method,4,@item).should == @ary.send(method,4,@item)
end
it "should modify the TypedArray as Array would be modified" do
@typed_ary.send(method,4,@item)
@ary.send(method,4,@item)
@typed_ary.to_a.should == @ary
end
end
context "when the item being pushed does not match (#{config[:fail][:all].first})" do
before :each do
@item = config[:fail][:all].first
end
it "should raise an exception" do
expect{ @typed_ary.send(method,4,@item) }.to raise_error TypedArray::UnexpectedTypeException
end
it "should not modify typed_ary" do
begin
backup = @typed_ary.to_a
@typed_ary.send(method,4,@item)
rescue TypedArray::UnexpectedTypeException
ensure
@typed_ary.to_a.should == backup
end
end
end
end
end
end
end
[:+,:&,:concat,:replace].each do |method|
context %Q{typed_ary#{('a'..'z').include?(method.to_s[0]) ? '.' : ' '}#{method.to_s} other_ary} do
inputs.each_pair do |accepted_types,config|
context "when only accepting <#{accepted_types.inspect}>" do
before :each do
@typed_ary = TypedArray( *accepted_types).new(config[:base])
@ary = config[:base].to_a
end
context "when all items match (#{config[:match].inspect})" do
before :each do
@other_ary = config[:match].to_a
end
it "should return as Array would return" do
@typed_ary.send(method,@other_ary).to_a.should == @ary.send(method,@other_ary)
end
it "should modify the TypedArray as Array would be modified" do
@typed_ary.send(method,@other_ary)
@ary.send(method,@other_ary)
@typed_ary.to_a.should == @ary
end
end
config[:fail].each_key do |fail_type|
context "when #{fail_type} item fails to match (#{config[:fail][fail_type].inspect})" do
before :each do
@other_ary = config[:fail][fail_type].to_a
end
unless method == :& # `and` opperator cannot produce elements that are not in both arrays already; since one is assuredly filtered, we can skip this.
it "should raise an exception" do
expect{ @typed_ary.send(method,@other_ary) }.to raise_error TypedArray::UnexpectedTypeException
end
end
it "should not modify the TypedArray" do
begin
backup = @typed_ary.to_a
@typed_ary.send(method,@other_ary)
rescue TypedArray::UnexpectedTypeException
ensure
@typed_ary.to_a.should == backup
end
end
end
end
end
end
end
end
context 'when extending classes' do
before :each do
@base = TypedArray(Symbol)
@extension = Class.new( @base )
end
it 'should inherit default restrictions' do
@base.restricted_types.should == @extension.restricted_types
end
context 'when adding restricted_type to the parent' do
it 'should propogate to the child' do
@base.restricted_type Fixnum
@extension.restricted_types.should include(Fixnum)
end
end
context 'when adding restricted_type to the child' do
it 'should not propogate to the parent' do
@extension.restricted_type Fixnum
@base.restricted_types.should_not include(Fixnum)
end
end
end
end
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