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83 lines
2.5 KiB
Ruby
83 lines
2.5 KiB
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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describe "Range#max" do
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it "returns the maximum value in the range when called with no arguments" do
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(1..10).max.should == 10
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(1...10).max.should == 9
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(0...2**64).max.should == 18446744073709551615
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('f'..'l').max.should == 'l'
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('a'...'f').max.should == 'e'
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end
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it "returns the maximum value in the Float range when called with no arguments" do
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(303.20..908.1111).max.should == 908.1111
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end
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it "raises TypeError when called on an exclusive range and a non Integer value" do
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lambda { (303.20...908.1111).max }.should raise_error(TypeError)
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end
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it "returns nil when the endpoint is less than the start point" do
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(100..10).max.should be_nil
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('z'..'l').max.should be_nil
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end
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it "returns nil when the endpoint equals the start point and the range is exclusive" do
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(5...5).max.should be_nil
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end
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it "returns the endpoint when the endpoint equals the start point and the range is inclusive" do
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(5..5).max.should equal(5)
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end
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it "returns nil when the endpoint is less than the start point in a Float range" do
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(3003.20..908.1111).max.should be_nil
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end
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it "returns end point when the range is Time..Time(included end point)" do
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time_start = Time.now
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time_end = Time.now + 1.0
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(time_start..time_end).max.should equal(time_end)
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end
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it "raises TypeError when called on a Time...Time(excluded end point)" do
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time_start = Time.now
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time_end = Time.now + 1.0
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lambda { (time_start...time_end).max }.should raise_error(TypeError)
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end
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end
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describe "Range#max given a block" do
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it "passes each pair of values in the range to the block" do
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acc = []
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(1..10).max {|a,b| acc << [a,b]; a }
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acc.flatten!
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(1..10).each do |value|
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acc.include?(value).should be_true
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end
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end
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it "passes each pair of elements to the block in reversed order" do
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acc = []
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(1..5).max {|a,b| acc << [a,b]; a }
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acc.should == [[2,1],[3,2], [4,3], [5, 4]]
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end
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it "calls #> and #< on the return value of the block" do
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obj = mock('obj')
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obj.should_receive(:>).exactly(2).times
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obj.should_receive(:<).exactly(2).times
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(1..3).max {|a,b| obj }
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end
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it "returns the element the block determines to be the maximum" do
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(1..3).max {|a,b| -3 }.should == 1
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end
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it "returns nil when the endpoint is less than the start point" do
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(100..10).max {|x,y| x <=> y}.should be_nil
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('z'..'l').max {|x,y| x <=> y}.should be_nil
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(5...5).max {|x,y| x <=> y}.should be_nil
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end
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end
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