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require File.expand_path('../../../spec_helper', __FILE__)
describe "Float#to_s" do
it "returns 'NaN' for NaN" do
nan_value().to_s.should == 'NaN'
end
it "returns 'Infinity' for positive infinity" do
infinity_value().to_s.should == 'Infinity'
end
it "returns '-Infinity' for negative infinity" do
(-infinity_value()).to_s.should == '-Infinity'
end
it "returns '0.0' for 0.0" do
0.0.to_s.should == "0.0"
end
platform_is_not :openbsd do
it "emits '-' for -0.0" do
-0.0.to_s.should == "-0.0"
end
end
it "emits a '-' for negative values" do
-3.14.to_s.should == "-3.14"
end
it "emits a trailing '.0' for a whole number" do
50.0.to_s.should == "50.0"
end
it "emits a trailing '.0' for the mantissa in e format" do
1.0e20.to_s.should == "1.0e+20"
end
it "uses non-e format for a positive value with fractional part having 5 significant figures" do
0.0001.to_s.should == "0.0001"
end
it "uses non-e format for a negative value with fractional part having 5 significant figures" do
-0.0001.to_s.should == "-0.0001"
end
it "uses e format for a positive value with fractional part having 6 significant figures" do
0.00001.to_s.should == "1.0e-05"
end
it "uses e format for a negative value with fractional part having 6 significant figures" do
-0.00001.to_s.should == "-1.0e-05"
end
it "uses non-e format for a positive value with whole part having 15 significant figures" do
10000000000000.0.to_s.should == "10000000000000.0"
end
it "uses non-e format for a negative value with whole part having 15 significant figures" do
-10000000000000.0.to_s.should == "-10000000000000.0"
end
ruby_version_is "" ... "1.9" do
it "uses e format for a positive value with whole part having 16 significant figures" do
100000000000000.0.to_s.should == "1.0e+14"
end
it "uses e format for a negative value with whole part having 16 significant figures" do
-100000000000000.0.to_s.should == "-1.0e+14"
end
end
ruby_version_is "1.9" do
it "uses non-e format for a positive value with whole part having 16 significant figures" do
100000000000000.0.to_s.should == "100000000000000.0"
end
it "uses non-e format for a negative value with whole part having 16 significant figures" do
-100000000000000.0.to_s.should == "-100000000000000.0"
end
it "uses e format for a positive value with whole part having 18 significant figures" do
10000000000000000.0.to_s.should == "1.0e+16"
end
it "uses e format for a negative value with whole part having 18 significant figures" do
-10000000000000000.0.to_s.should == "-1.0e+16"
end
end
ruby_version_is "1.9"..."2.0" do
it "uses non-e format for a positive value with whole part having 17 significant figures" do
1000000000000000.0.to_s.should == "1000000000000000.0"
end
it "uses non-e format for a negative value with whole part having 17 significant figures" do
-1000000000000000.0.to_s.should == "-1000000000000000.0"
end
end
ruby_version_is "2.0" do
it "uses non-e format for a positive value with whole part having 17 significant figures" do
1000000000000000.0.to_s.should == "1.0e+15"
end
it "uses non-e format for a negative value with whole part having 17 significant figures" do
-1000000000000000.0.to_s.should == "-1.0e+15"
end
end
ruby_bug "#3273", "1.8.7" do
it "outputs the minimal, unique form necessary to recreate the value" do
value = 0.21611564636388508
string = "0.21611564636388508"
value.to_s.should == string
string.to_f.should == value
end
end
it "outputs the minimal, unique form to represent the value" do
0.56.to_s.should == "0.56"
end
end
with_feature :encoding do
describe "Float#to_s" do
before :each do
@internal = Encoding.default_internal
end
after :each do
Encoding.default_internal = @internal
end
it "returns a String in US-ASCII encoding when Encoding.default_internal is nil" do
Encoding.default_internal = nil
1.23.to_s.encoding.should equal(Encoding::US_ASCII)
end
it "returns a String in US-ASCII encoding when Encoding.default_internal is not nil" do
Encoding.default_internal = Encoding::IBM437
5.47.to_s.encoding.should equal(Encoding::US_ASCII)
end
end
end
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