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Diffstat (limited to 'spec/ruby/core/range/min_spec.rb')
-rw-r--r-- | spec/ruby/core/range/min_spec.rb | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/spec/ruby/core/range/min_spec.rb b/spec/ruby/core/range/min_spec.rb new file mode 100644 index 0000000000..b6eebd8c35 --- /dev/null +++ b/spec/ruby/core/range/min_spec.rb @@ -0,0 +1,75 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Range#min" do + it "returns the minimum value in the range when called with no arguments" do + (1..10).min.should == 1 + ('f'..'l').min.should == 'f' + end + + it "returns the minimum value in the Float range when called with no arguments" do + (303.20..908.1111).min.should == 303.20 + end + + it "returns nil when the start point is greater than the endpoint" do + (100..10).min.should be_nil + ('z'..'l').min.should be_nil + end + + it "returns nil when the endpoint equals the start point and the range is exclusive" do + (7...7).min.should be_nil + end + + it "returns the start point when the endpoint equals the start point and the range is inclusive" do + (7..7).min.should equal(7) + end + + it "returns nil when the start point is greater than the endpoint in a Float range" do + (3003.20..908.1111).min.should be_nil + end + + it "returns start point when the range is Time..Time(included end point)" do + time_start = Time.now + time_end = Time.now + 1.0 + (time_start..time_end).min.should equal(time_start) + end + + it "returns start point when the range is Time...Time(excluded end point)" do + time_start = Time.now + time_end = Time.now + 1.0 + (time_start...time_end).min.should equal(time_start) + end +end + +describe "Range#min given a block" do + it "passes each pair of values in the range to the block" do + acc = [] + (1..10).min {|a,b| acc << [a,b]; a } + acc.flatten! + (1..10).each do |value| + acc.include?(value).should be_true + end + end + + it "passes each pair of elements to the block where the first argument is the current element, and the last is the first element" do + acc = [] + (1..5).min {|a,b| acc << [a,b]; a } + acc.should == [[2, 1], [3, 1], [4, 1], [5, 1]] + end + + it "calls #> and #< on the return value of the block" do + obj = mock('obj') + obj.should_receive(:>).exactly(2).times + obj.should_receive(:<).exactly(2).times + (1..3).min {|a,b| obj } + end + + it "returns the element the block determines to be the minimum" do + (1..3).min {|a,b| -3 }.should == 3 + end + + it "returns nil when the start point is greater than the endpoint" do + (100..10).min {|x,y| x <=> y}.should be_nil + ('z'..'l').min {|x,y| x <=> y}.should be_nil + (7...7).min {|x,y| x <=> y}.should be_nil + end +end |