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* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
35 lines
841 B
Ruby
35 lines
841 B
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
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require 'matrix'
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describe "Matrix#column" do
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before :all do
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@m = Matrix[[1,2,3], [2,3,4]]
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end
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it "returns a Vector when called without a block" do
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@m.column(1).should == Vector[2,3]
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end
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it "yields each element in the column to the block" do
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a = []
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@m.column(1) {|n| a << n }
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a.should == [2,3]
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end
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it "counts backwards for negative argument" do
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@m.column(-1).should == Vector[3, 4]
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end
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it "returns self when called with a block" do
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@m.column(0) { |x| x }.should equal(@m)
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end
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it "returns nil when out of bounds" do
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@m.column(3).should == nil
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end
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it "never yields when out of bounds" do
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lambda { @m.column(3){ raise } }.should_not raise_error
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lambda { @m.column(-4){ raise } }.should_not raise_error
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end
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end
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