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401b64c4e8
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62656 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
81 lines
2.7 KiB
Ruby
81 lines
2.7 KiB
Ruby
require_relative '../../spec_helper'
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require 'matrix'
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describe "Matrix#each_with_index" do
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before :all do
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@m = Matrix[ [1, 2, 3], [4, 5, 6] ]
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@result = [
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[1, 0, 0],
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[2, 0, 1],
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[3, 0, 2],
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[4, 1, 0],
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[5, 1, 1],
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[6, 1, 2]
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]
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end
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it "returns an Enumerator when called without a block" do
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enum = @m.each_with_index
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enum.should be_an_instance_of(Enumerator)
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enum.to_a.should == @result
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end
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it "returns self" do
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@m.each_with_index{}.should equal(@m)
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end
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it "yields the elements starting with the those of the first row" do
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a = []
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@m.each_with_index {|x, r, c| a << [x, r, c]}
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a.should == @result
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end
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end
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describe "Matrix#each_with_index with an argument" do
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before :all do
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@m = Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ]
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@t = Matrix[ [1, 2], [3, 4], [5, 6], [7, 8] ]
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end
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it "raises an ArgumentError for unrecognized argument" do
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lambda {
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@m.each_with_index("all"){}
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}.should raise_error(ArgumentError)
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lambda {
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@m.each_with_index(nil){}
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}.should raise_error(ArgumentError)
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lambda {
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@m.each_with_index(:left){}
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}.should raise_error(ArgumentError)
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end
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it "yields the rights elements when passed :diagonal" do
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@m.each_with_index(:diagonal).to_a.should == [[1, 0, 0], [6, 1, 1]]
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@t.each_with_index(:diagonal).to_a.should == [[1, 0, 0], [4, 1, 1]]
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end
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it "yields the rights elements when passed :off_diagonal" do
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@m.each_with_index(:off_diagonal).to_a.should == [[2, 0, 1], [3, 0, 2], [4, 0, 3], [5, 1, 0], [7, 1, 2], [8, 1, 3]]
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@t.each_with_index(:off_diagonal).to_a.should == [[2, 0, 1], [3, 1, 0], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
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end
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it "yields the rights elements when passed :lower" do
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@m.each_with_index(:lower).to_a.should == [[1, 0, 0], [5, 1, 0], [6, 1, 1]]
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@t.each_with_index(:lower).to_a.should == [[1, 0, 0], [3, 1, 0], [4, 1, 1], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
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end
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it "yields the rights elements when passed :strict_lower" do
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@m.each_with_index(:strict_lower).to_a.should == [[5, 1, 0]]
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@t.each_with_index(:strict_lower).to_a.should == [[3, 1, 0], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
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end
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it "yields the rights elements when passed :strict_upper" do
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@m.each_with_index(:strict_upper).to_a.should == [[2, 0, 1], [3, 0, 2], [4, 0, 3], [7, 1, 2], [8, 1, 3]]
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@t.each_with_index(:strict_upper).to_a.should == [[2, 0, 1]]
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end
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it "yields the rights elements when passed :upper" do
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@m.each_with_index(:upper).to_a.should == [[1, 0, 0], [2, 0, 1], [3, 0, 2], [4, 0, 3], [6, 1, 1], [7, 1, 2], [8, 1, 3]]
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@t.each_with_index(:upper).to_a.should == [[1, 0, 0], [2, 0, 1], [4, 1, 1]]
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end
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end
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