float_spec.rb

require_relative 'spec_helper'

load_extension("float")

describe "CApiFloatSpecs" do
  before :each do
    @f = CApiFloatSpecs.new
  end

  describe "rb_float_new" do
    it "creates a new float" do
      ((@f.new_zero - 0).abs < 0.000001).should == true
      ((@f.new_point_five - 0.555).abs < 0.000001).should == true
    end
  end

  describe "RFLOAT_VALUE" do
    it "returns the C double value of the Float" do
      @f.RFLOAT_VALUE(2.3).should == 2.3
    end
  end

  describe "rb_Float" do
    it "creates a new Float from a String" do
      f = @f.rb_Float("101.99")
      f.should be_kind_of(Float)
      f.should eql(101.99)
    end
  end

  describe "RB_FLOAT_TYPE_P" do
    it "returns true for floats" do
      @f.RB_FLOAT_TYPE_P(2.0).should == true
    end

    it "returns false for non-floats" do
      @f.RB_FLOAT_TYPE_P(nil).should == false
      @f.RB_FLOAT_TYPE_P(10).should == false
      @f.RB_FLOAT_TYPE_P("string").should == false
      @f.RB_FLOAT_TYPE_P(Object.new).should == false
    end
  end
end