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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require 'matrix'
describe "Matrix#+" do
before :each do
@a = Matrix[ [1,2], [3,4] ]
@b = Matrix[ [4,5], [6,7] ]
end
it "returns the result of adding the corresponding elements of self and other" do
(@a + @b).should == Matrix[ [5,7], [9,11] ]
end
it "returns an instance of Matrix" do
(@a + @b).should be_kind_of(Matrix)
end
it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
-> { @a + Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
end
it "raises a ExceptionForMatrix::ErrOperationNotDefined if other is a Numeric Type" do
-> { @a + 2 }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
-> { @a + 1.2 }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
-> { @a + bignum_value }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
end
it "raises a TypeError if other is of wrong type" do
-> { @a + nil }.should raise_error(TypeError)
-> { @a + "a" }.should raise_error(TypeError)
-> { @a + [ [1, 2] ] }.should raise_error(TypeError)
-> { @a + Object.new }.should raise_error(TypeError)
end
describe "for a subclass of Matrix" do
it "returns an instance of that subclass" do
m = MatrixSub.ins
(m+m).should be_an_instance_of(MatrixSub)
end
end
end
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