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require_relative '../../spec_helper'
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] ]
@c = Matrix[ [1.2, 2.4], [3.6, 4.8] ]
end
it "returns the result of dividing self by another Matrix" do
(@a / @b).should be_close_to_matrix([[2.5, -1.5], [1.5, -0.5]])
end
# Guard against the Mathn library
guard -> { !defined?(Math.rsqrt) } do
it "returns the result of dividing self by an Integer" do
(@a / 2).should == Matrix[ [0, 1], [1, 2] ]
end
it "returns the result of dividing self by an Integer" do
(@a / bignum_value).should == Matrix[ [0, 0], [0, 0] ]
end
end
it "returns the result of dividing self by a Float" do
(@c / 1.2).should == Matrix[ [1, 2], [3, 4] ]
end
it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
-> { @a / Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
end
it "returns an instance of Matrix" do
(@a / @b).should be_kind_of(Matrix)
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)
(m/1).should be_an_instance_of(MatrixSub)
end
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
end
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