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Contents
describe Integer, "#square?" do
@seq = [0,1,4,9,16,25,36,49,64,81,100,121,144,169,196,
225,256,289,324,361,400,441,484,529,576,625,676,
729,784,841,900,961,1024,1089,1156,1225,1296,1369,
1444,1521,1600,1681,1764,1849]
@seq.each do |n|
it "returns true for square number #{n}" do
n.should be_square
end
end
@seq.to_seq.invert.each do |n|
it "returns false for non-square number #{n}" do
n.should_not be_square
end
end
it "returns false for negative numbers" do
[-1, -378, -9].each do |n|
n.should_not be_square
end
end
it "returns nil when the square root is infinite" do
9999999880000000359859986946294623781838875946012712893365986548632235701967954558670969253503997913415008896487205684793069342787691170258832794954572186327945677037037154860793120217960493002317298159645342431034751955276791509386257991014312642060444444445753597283950617283950617283950617283950617283950617283950617283950617283950617284297678218281.square?.should be_nil
end
end
Version data entries
6 entries across 6 versions & 1 rubygems