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Diffstat (limited to 'spec/rubyspec/library/bigdecimal/new_spec.rb')
-rw-r--r-- | spec/rubyspec/library/bigdecimal/new_spec.rb | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/spec/rubyspec/library/bigdecimal/new_spec.rb b/spec/rubyspec/library/bigdecimal/new_spec.rb new file mode 100644 index 0000000000..de3aa195ca --- /dev/null +++ b/spec/rubyspec/library/bigdecimal/new_spec.rb @@ -0,0 +1,109 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require 'bigdecimal' + +describe "BigDecimal.new" do + + it "creates a new object of class BigDecimal" do + BigDecimal.new("3.14159").should be_kind_of(BigDecimal) + (0..9).each {|i| + BigDecimal.new("1#{i}").should == 10 + i + BigDecimal.new("-1#{i}").should == -10 - i + BigDecimal.new("1E#{i}").should == 10**i + BigDecimal.new("1000000E-#{i}").should == 10**(6-i).to_f + # ^ to_f to avoid Rational type + } + (1..9).each {|i| + BigDecimal.new("100.#{i}").to_s.should =~ /\A0\.100#{i}E3\z/i + BigDecimal.new("-100.#{i}").to_s.should =~ /\A-0\.100#{i}E3\z/i + } + end + + it "accepts significant digits >= given precision" do + BigDecimal.new("3.1415923", 10).precs[1].should >= 10 + end + + it "determines precision from initial value" do + pi_string = "3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043" + BigDecimal.new(pi_string).precs[1].should >= pi_string.size-1 + end + + it "ignores leading whitespace" do + BigDecimal.new(" \t\n \r1234").should == BigDecimal.new("1234") + BigDecimal.new(" \t\n \rNaN \n").nan?.should == true + BigDecimal.new(" \t\n \rInfinity \n").infinite?.should == 1 + BigDecimal.new(" \t\n \r-Infinity \n").infinite?.should == -1 + end + + it "ignores trailing garbage" do + BigDecimal.new("123E45ruby").should == BigDecimal.new("123E45") + BigDecimal.new("123x45").should == BigDecimal.new("123") + BigDecimal.new("123.4%E5").should == BigDecimal.new("123.4") + BigDecimal.new("1E2E3E4E5E").should == BigDecimal.new("100") + end + + ruby_version_is ""..."2.4" do + it "treats invalid strings as 0.0" do + BigDecimal.new("ruby").should == BigDecimal.new("0.0") + BigDecimal.new(" \t\n \r-\t\t\tInfinity \n").should == BigDecimal.new("0.0") + end + end + + ruby_version_is "2.4" do + it "raises ArgumentError for invalid strings" do + lambda { BigDecimal.new("ruby") }.should raise_error(ArgumentError) + lambda { BigDecimal.new(" \t\n \r-\t\t\tInfinity \n") }.should raise_error(ArgumentError) + end + end + + it "allows omitting the integer part" do + BigDecimal.new(".123").should == BigDecimal.new("0.123") + end + + it "allows for underscores in all parts" do + reference = BigDecimal.new("12345.67E89") + + BigDecimal.new("12_345.67E89").should == reference + BigDecimal.new("1_2_3_4_5_._6____7_E89").should == reference + BigDecimal.new("12345_.67E_8__9_").should == reference + end + + it "accepts NaN and [+-]Infinity" do + BigDecimal.new("NaN").nan?.should == true + + pos_inf = BigDecimal.new("Infinity") + pos_inf.finite?.should == false + pos_inf.should > 0 + pos_inf.should == BigDecimal.new("+Infinity") + + neg_inf = BigDecimal.new("-Infinity") + neg_inf.finite?.should == false + neg_inf.should < 0 + end + + it "allows for [eEdD] as exponent separator" do + reference = BigDecimal.new("12345.67E89") + + BigDecimal.new("12345.67e89").should == reference + BigDecimal.new("12345.67E89").should == reference + BigDecimal.new("12345.67d89").should == reference + BigDecimal.new("12345.67D89").should == reference + end + + it "allows for varying signs" do + reference = BigDecimal.new("123.456E1") + + BigDecimal.new("+123.456E1").should == reference + BigDecimal.new("-123.456E1").should == -reference + BigDecimal.new("123.456E+1").should == reference + BigDecimal.new("12345.6E-1").should == reference + BigDecimal.new("+123.456E+1").should == reference + BigDecimal.new("+12345.6E-1").should == reference + BigDecimal.new("-123.456E+1").should == -reference + BigDecimal.new("-12345.6E-1").should == -reference + end + + it 'raises ArgumentError when Float is used without precision' do + lambda { BigDecimal(1.0) }.should raise_error(ArgumentError) + end + +end |