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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
require 'matrix'
describe "Matrix.zero" do
it "returns an object of type Matrix" do
Matrix.zero(3).should be_kind_of(Matrix)
end
it "creates a n x n matrix" do
m3 = Matrix.zero(3)
m3.row_size.should == 3
m3.column_size.should == 3
m8 = Matrix.zero(8)
m8.row_size.should == 8
m8.column_size.should == 8
end
it "initializes all cells to 0" do
size = 10
m = Matrix.zero(size)
(0...size).each do |i|
(0...size).each do |j|
m[i, j].should == 0
end
end
end
ruby_bug "redmine #5307", "1.9.3" do
describe "for a subclass of Matrix" do
it "returns an instance of that subclass" do
MatrixSub.zero(3).should be_an_instance_of(MatrixSub)
end
end
end
end
ruby_version_is "1.9.3" do
describe "Matrix.zero?" do
it "returns true for empty matrices" do
Matrix.empty.zero?.should == true
Matrix.empty(3,0).zero?.should == true
Matrix.empty(0,3).zero?.should == true
end
it "returns true for matrices with zero entries" do
Matrix.zero(2,3).zero?.should == true
end
it "returns false for matrices with non zero entries" do
Matrix[[1]].zero?.should == false
end
end
end
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