ruby--ruby/spec/ruby/core/marshal/float_spec.rb

require_relative '../../spec_helper'

describe "Marshal.dump with Float" do
  it "represents NaN" do
    Marshal.dump(nan_value).should == "\004\bf\bnan"
  end

  it "represents +Infinity" do
    Marshal.dump(infinity_value).should == "\004\bf\binf"
  end

  it "represents -Infinity" do
    Marshal.dump(-infinity_value).should == "\004\bf\t-inf"
  end

  it "represents zero" do
    Marshal.dump(0.0).should == "\004\bf\0060"
  end

  it "represents a Float less than 1" do
    Marshal.dump(0.666666667).should == "\x04\bf\x100.666666667"
  end

  it "represents a Float much less than 1" do
    Marshal.dump(0.000000001234697).should == "\x04\bf\x101.234697e-9"
  end

  it "represents a Float greater than 1" do
    Marshal.dump(42.666666667).should == "\x04\bf\x1142.666666667"
  end

  it "represents a Float much greater than 1" do
    Marshal.dump(98743561239011.0).should == "\x04\bf\x1398743561239011"
  end

  it "represents a Float much greater than 1 with a very small fractional part" do
    Marshal.dump(799346183459.0000000002999312541).should == "\x04\bf\x11799346183459"
  end
end

describe "Marshal.load with Float" do
  it "loads NaN" do
    Marshal.load("\004\bf\bnan").should be_nan
  end

  it "loads +Infinity" do
    Marshal.load("\004\bf\binf").should == infinity_value
  end

  it "loads -Infinity" do
    Marshal.load("\004\bf\t-inf").should == -infinity_value
  end

  it "loads zero" do
    Marshal.load("\004\bf\0060").should == 0.0
  end

  it "loads a Float less than 1" do
    Marshal.load("\x04\bf\x100.666666667").should == 0.666666667
  end

  it "loads a Float much less than 1" do
    Marshal.load("\x04\bf\x101.234697e-9").should == 0.000000001234697
  end

  it "loads a Float greater than 1" do
    Marshal.load("\x04\bf\x1142.666666667").should == 42.666666667
  end

  it "loads a Float much greater than 1" do
    Marshal.load("\x04\bf\x1398743561239011").should == 98743561239011.0
  end

  it "loads a Float much greater than 1 with a very small fractional part" do
    Marshal.load("\x04\bf\x16793468359.0002999").should == 793468359.0002999
  end
end