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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/methods', __FILE__)
describe "Time#-" do
it "decrements the time by the specified amount" do
(Time.at(100) - 100).should == Time.at(0)
(Time.at(100) - Time.at(99)).should == 1.0
end
it "understands negative subtractions" do
t = Time.at(100) - -1.3
t.usec.should == 300000
t.to_i.should == 101
end
ruby_version_is ""..."1.9" do
it "accepts arguments that can be coerced into Float" do
(obj = mock('9.5')).should_receive(:to_f).and_return(9.5)
(Time.at(100) - obj).should == Time.at(90.5)
end
end
ruby_version_is "1.9" do
#see [ruby-dev:38446]
it "accepts arguments that can be coerced into Rational" do
(obj = mock_numeric('10')).should_receive(:to_r).and_return(Rational(10))
(Time.at(100) - obj).should == Time.at(90)
end
end
it "raises TypeError on argument that can't be coerced" do
lambda { Time.now - Object.new }.should raise_error(TypeError)
lambda { Time.now - "stuff" }.should raise_error(TypeError)
end
it "raises TypeError on nil argument" do
lambda { Time.now - nil }.should raise_error(TypeError)
end
it "tracks microseconds" do
time = Time.at(0.777777)
time -= 0.654321
time.usec.should == 123456
time -= 1
time.usec.should == 123456
end
ruby_version_is "1.9" do
it "tracks microseconds" do
time = Time.at(Rational(777_777, 1_000_000))
time -= Rational(654_321, 1_000_000)
time.usec.should == 123_456
time -= Rational(123_456, 1_000_000)
time.usec.should == 0
end
it "tracks nanoseconds" do
time = Time.at(Rational(999_999_999, 1_000_000_000))
time -= Rational(876_543_210, 1_000_000_000)
time.nsec.should == 123_456_789
time -= Rational(123_456_789, 1_000_000_000)
time.nsec.should == 0
end
it "maintains precision" do
time = Time.at(10) - Rational(1_000_000_000_000_001, 1_000_000_000_000_000)
time.should_not == Time.at(9)
end
it "maintains microseconds precision" do
time = Time.at(10) - Rational(1_000_000_000_000_001, 1_000_000_000_000_000)
time.usec.should == 999_999
end
it "maintains nanoseconds precision" do
time = Time.at(10) - Rational(1_000_000_000_000_001, 1_000_000_000_000_000)
time.nsec.should == 999_999_999
end
it "maintains subseconds precision" do
time = Time.at(0) - Rational(1_000_000_000_000_001, 1_000_000_000_000_000)
time.subsec.should == Rational(999_999_999_999_999, 1_000_000_000_000_000)
end
end
it "returns a UTC time if self is UTC" do
(Time.utc(2012) - 10).utc?.should == true
end
it "returns a non-UTC time if self is non-UTC" do
(Time.local(2012) - 10).utc?.should == false
end
ruby_version_is "1.9" do
it "returns a time with the same fixed offset as self" do
(Time.new(2012, 1, 1, 0, 0, 0, 3600) - 10).utc_offset.should == 3600
end
end
it "does not returns a subclass instance" do
c = Class.new(Time)
x = c.now + 1
x.should be_kind_of(Time)
end
end
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