diff options
Diffstat (limited to 'spec/ruby/library/matrix/vector/each2_spec.rb')
-rw-r--r-- | spec/ruby/library/matrix/vector/each2_spec.rb | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/vector/each2_spec.rb b/spec/ruby/library/matrix/vector/each2_spec.rb new file mode 100644 index 0000000000..e9d89e21c4 --- /dev/null +++ b/spec/ruby/library/matrix/vector/each2_spec.rb @@ -0,0 +1,49 @@ +require File.expand_path('../../../../spec_helper', __FILE__) +require 'matrix' + +describe "Vector.each2" do + before :all do + @v = Vector[1, 2, 3] + @v2 = Vector[4, 5, 6] + end + + it "requires one argument" do + lambda { @v.each2(@v2, @v2){} }.should raise_error(ArgumentError) + lambda { @v.each2(){} }.should raise_error(ArgumentError) + end + + describe "given one argument" do + it "accepts an Array argument" do + a = [] + @v.each2([7, 8, 9]){|x, y| a << x << y} + a.should == [1, 7, 2, 8, 3, 9] + end + + it "raises a DimensionMismatch error if the Vector size is different" do + lambda { @v.each2(Vector[1,2]){} }.should raise_error(Vector::ErrDimensionMismatch) + lambda { @v.each2(Vector[1,2,3,4]){} }.should raise_error(Vector::ErrDimensionMismatch) + end + + it "yields arguments in sequence" do + a = [] + @v.each2(@v2){|first, second| a << [first, second]} + a.should == [[1, 4], [2, 5], [3, 6]] + end + + it "yield arguments in pairs" do + a = [] + @v.each2(@v2){|*pair| a << pair} + a.should == [[1, 4], [2, 5], [3, 6]] + end + + it "returns self when given a block" do + @v.each2(@v2){}.should equal(@v) + end + + it "returns an enumerator if no block given" do + enum = @v.each2(@v2) + enum.should be_an_instance_of(Enumerator) + enum.to_a.should == [[1, 4], [2, 5], [3, 6]] + end + end +end |