diff options
Diffstat (limited to 'spec/ruby/core/time/comparison_spec.rb')
-rw-r--r-- | spec/ruby/core/time/comparison_spec.rb | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/spec/ruby/core/time/comparison_spec.rb b/spec/ruby/core/time/comparison_spec.rb new file mode 100644 index 0000000000..c5a5b83d28 --- /dev/null +++ b/spec/ruby/core/time/comparison_spec.rb @@ -0,0 +1,94 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Time#<=>" do + it "returns 1 if the first argument is a point in time after the second argument" do + (Time.now <=> Time.at(0)).should == 1 + end + + it "returns 1 if the first argument is a point in time after the second argument (down to a millisecond)" do + (Time.at(0, 1000) <=> Time.at(0, 0)).should == 1 + (Time.at(1202778512, 1000) <=> Time.at(1202778512, 999)).should == 1 + end + + it "returns 1 if the first argument is a point in time after the second argument (down to a microsecond)" do + (Time.at(0, 100) <=> Time.at(0, 0)).should == 1 + (Time.at(1202778512, 100) <=> Time.at(1202778512, 99)).should == 1 + end + + it "returns 0 if time is the same as other" do + (Time.at(1202778513) <=> Time.at(1202778513)).should == 0 + (Time.at(100, 100) <=> Time.at(100, 100)).should == 0 + end + + it "returns -1 if the first argument is a point in time before the second argument" do + (Time.at(0) <=> Time.now).should == -1 + (Time.at(100, 100) <=> Time.at(101, 100)).should == -1 + end + + it "returns -1 if the first argument is a point in time before the second argument (down to a millisecond)" do + (Time.at(0, 0) <=> Time.at(0, 1000)).should == -1 + end + + it "returns -1 if the first argument is a point in time before the second argument (down to a microsecond)" do + (Time.at(0, 0) <=> Time.at(0, 100)).should == -1 + end + + it "returns 1 if the first argument is a fraction of a microsecond after the second argument" do + (Time.at(100, Rational(1,1000)) <=> Time.at(100, 0)).should == 1 + end + + it "returns 0 if time is the same as other, including fractional microseconds" do + (Time.at(100, Rational(1,1000)) <=> Time.at(100, Rational(1,1000))).should == 0 + end + + it "returns -1 if the first argument is a fraction of a microsecond before the second argument" do + (Time.at(100, 0) <=> Time.at(100, Rational(1,1000))).should == -1 + end + + describe "given a non-Time argument" do + it "returns nil if argument <=> self returns nil" do + t = Time.now + obj = mock('time') + obj.should_receive(:<=>).with(t).and_return(nil) + (t <=> obj).should == nil + end + + it "returns -1 if argument <=> self is greater than 0" do + t = Time.now + r = mock('r') + r.should_receive(:>).with(0).and_return(true) + obj = mock('time') + obj.should_receive(:<=>).with(t).and_return(r) + (t <=> obj).should == -1 + end + + it "returns 1 if argument <=> self is not greater than 0 and is less than 0" do + t = Time.now + r = mock('r') + r.should_receive(:>).with(0).and_return(false) + r.should_receive(:<).with(0).and_return(true) + obj = mock('time') + obj.should_receive(:<=>).with(t).and_return(r) + (t <=> obj).should == 1 + end + + it "returns 0 if argument <=> self is neither greater than 0 nor less than 0" do + t = Time.now + r = mock('r') + r.should_receive(:>).with(0).and_return(false) + r.should_receive(:<).with(0).and_return(false) + obj = mock('time') + obj.should_receive(:<=>).with(t).and_return(r) + (t <=> obj).should == 0 + end + + it "returns nil if argument also uses an inverse comparison for <=>" do + t = Time.now + r = mock('r') + def r.<=>(other); other <=> self; end + r.should_receive(:<=>).once + + (t <=> r).should be_nil + end + end +end |