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author | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-04-28 19:50:06 +0000 |
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committer | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-04-28 19:50:06 +0000 |
commit | 4fbb9aa3cb6c31ec128bfb31f59efa66d66adba4 (patch) | |
tree | 84a654b260261fe172f2584f60b3ba93e59f841d /spec/ruby/library/bigdecimal/BigDecimal_spec.rb | |
parent | b864bd05bff2a61d55b08deb92e969f9fa55e07c (diff) | |
download | ruby-4fbb9aa3cb6c31ec128bfb31f59efa66d66adba4.tar.gz |
Update to ruby/spec@6f38a82
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63293 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'spec/ruby/library/bigdecimal/BigDecimal_spec.rb')
-rw-r--r-- | spec/ruby/library/bigdecimal/BigDecimal_spec.rb | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/BigDecimal_spec.rb b/spec/ruby/library/bigdecimal/BigDecimal_spec.rb new file mode 100644 index 0000000000..d278512737 --- /dev/null +++ b/spec/ruby/library/bigdecimal/BigDecimal_spec.rb @@ -0,0 +1,109 @@ +require_relative '../../spec_helper' +require 'bigdecimal' + +describe "Kernel#BigDecimal" do + + it "creates a new object of class BigDecimal" do + BigDecimal("3.14159").should be_kind_of(BigDecimal) + (0..9).each {|i| + BigDecimal("1#{i}").should == 10 + i + BigDecimal("-1#{i}").should == -10 - i + BigDecimal("1E#{i}").should == 10**i + BigDecimal("1000000E-#{i}").should == 10**(6-i).to_f + # ^ to_f to avoid Rational type + } + (1..9).each {|i| + BigDecimal("100.#{i}").to_s.should =~ /\A0\.100#{i}E3\z/i + BigDecimal("-100.#{i}").to_s.should =~ /\A-0\.100#{i}E3\z/i + } + end + + it "accepts significant digits >= given precision" do + BigDecimal("3.1415923", 10).precs[1].should >= 10 + end + + it "determines precision from initial value" do + pi_string = "3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043" + BigDecimal(pi_string).precs[1].should >= pi_string.size-1 + end + + it "ignores leading whitespace" do + BigDecimal(" \t\n \r1234").should == BigDecimal("1234") + BigDecimal(" \t\n \rNaN \n").nan?.should == true + BigDecimal(" \t\n \rInfinity \n").infinite?.should == 1 + BigDecimal(" \t\n \r-Infinity \n").infinite?.should == -1 + end + + it "ignores trailing garbage" do + BigDecimal("123E45ruby").should == BigDecimal("123E45") + BigDecimal("123x45").should == BigDecimal("123") + BigDecimal("123.4%E5").should == BigDecimal("123.4") + BigDecimal("1E2E3E4E5E").should == BigDecimal("100") + end + + ruby_version_is ""..."2.4" do + it "treats invalid strings as 0.0" do + BigDecimal("ruby").should == BigDecimal("0.0") + BigDecimal(" \t\n \r-\t\t\tInfinity \n").should == BigDecimal("0.0") + end + end + + ruby_version_is "2.4" do + it "raises ArgumentError for invalid strings" do + lambda { BigDecimal("ruby") }.should raise_error(ArgumentError) + lambda { BigDecimal(" \t\n \r-\t\t\tInfinity \n") }.should raise_error(ArgumentError) + end + end + + it "allows omitting the integer part" do + BigDecimal(".123").should == BigDecimal("0.123") + end + + it "allows for underscores in all parts" do + reference = BigDecimal("12345.67E89") + + BigDecimal("12_345.67E89").should == reference + BigDecimal("1_2_3_4_5_._6____7_E89").should == reference + BigDecimal("12345_.67E_8__9_").should == reference + end + + it "accepts NaN and [+-]Infinity" do + BigDecimal("NaN").nan?.should == true + + pos_inf = BigDecimal("Infinity") + pos_inf.finite?.should == false + pos_inf.should > 0 + pos_inf.should == BigDecimal("+Infinity") + + neg_inf = BigDecimal("-Infinity") + neg_inf.finite?.should == false + neg_inf.should < 0 + end + + it "allows for [eEdD] as exponent separator" do + reference = BigDecimal("12345.67E89") + + BigDecimal("12345.67e89").should == reference + BigDecimal("12345.67E89").should == reference + BigDecimal("12345.67d89").should == reference + BigDecimal("12345.67D89").should == reference + end + + it "allows for varying signs" do + reference = BigDecimal("123.456E1") + + BigDecimal("+123.456E1").should == reference + BigDecimal("-123.456E1").should == -reference + BigDecimal("123.456E+1").should == reference + BigDecimal("12345.6E-1").should == reference + BigDecimal("+123.456E+1").should == reference + BigDecimal("+12345.6E-1").should == reference + BigDecimal("-123.456E+1").should == -reference + BigDecimal("-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 |