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68 lines
1.4 KiB
Ruby
68 lines
1.4 KiB
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix.scalar" do
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before :each do
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@side = 3
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@value = 8
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@a = Matrix.scalar(@side, @value)
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end
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it "returns a Matrix" do
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@a.should be_kind_of(Matrix)
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end
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it "returns a n x n matrix" do
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@a.row_size.should == @side
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@a.column_size.should == @side
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end
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it "initializes diagonal to value" do
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(0...@a.row_size).each do |i|
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@a[i, i].should == @value
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end
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end
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it "initializes all non-diagonal values to 0" do
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(0...@a.row_size).each do |i|
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(0...@a.column_size).each do |j|
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if i != j
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@a[i, j].should == 0
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end
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end
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end
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end
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before :each do
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@side = 3
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@value = 8
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@a = Matrix.scalar(@side, @value)
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end
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it "returns a Matrix" do
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@a.should be_kind_of(Matrix)
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end
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it "returns a square matrix, where the first argument specifies the side of the square" do
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@a.row_size.should == @side
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@a.column_size.should == @side
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end
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it "puts the second argument in all diagonal values" do
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(0...@a.row_size).each do |i|
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@a[i, i].should == @value
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end
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end
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it "fills all values not on the main diagonal with 0" do
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(0...@a.row_size).each do |i|
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(0...@a.column_size).each do |j|
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if i != j
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@a[i, j].should == 0
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end
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end
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end
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end
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end
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