Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 88 insertions, 0 deletions

diff --git a/spec/rubyspec/library/bigdecimal/split_spec.rb b/spec/rubyspec/library/bigdecimal/split_spec.rb
new file mode 100644
index 0000000000..e2ba955a3b
--- /dev/null
+++ b/spec/rubyspec/library/bigdecimal/split_spec.rb
@@ -0,0 +1,88 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'bigdecimal'
+
+describe "BigDecimal#split" do
+
+  before :each do
+    @arr = BigDecimal("0.314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043E1").split
+    @arr_neg = BigDecimal("-0.314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043E1").split
+    @digits = "922337203685477580810101333333333333333333333333333"
+    @arr_big = BigDecimal("00#{@digits}000").split
+    @arr_big_neg = BigDecimal("-00#{@digits}000").split
+    @huge = BigDecimal('100000000000000000000000000000000000000000001E90000000').split
+
+    @infinity = BigDecimal("Infinity")
+    @infinity_neg = BigDecimal("-Infinity")
+    @nan = BigDecimal("NaN")
+    @zero = BigDecimal("0")
+    @zero_neg = BigDecimal("-0")
+  end
+
+  it "splits BigDecimal in an array with four values" do
+    @arr.size.should == 4
+  end
+
+  it "first value: 1 for numbers > 0" do
+    @arr[0].should == 1
+    @arr_big[0].should == 1
+    @zero.split[0].should == 1
+    @huge[0].should == 1
+    BigDecimal("+0").split[0].should == 1
+    BigDecimal("1E400").split[0].should == 1
+    @infinity.split[0].should == 1
+  end
+
+  it "first value: -1 for numbers < 0" do
+    @arr_neg[0].should == -1
+    @arr_big_neg[0].should == -1
+    @zero_neg.split[0].should == -1
+    BigDecimal("-1E400").split[0].should == -1
+    @infinity_neg.split[0].should == -1
+  end
+
+  it "first value: 0 if BigDecimal is NaN" do
+    BigDecimal("NaN").split[0].should == 0
+  end
+
+  it "second value: a string with the significant digits" do
+    string = "314159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593014782083152134043"
+    @arr[1].should == string
+    @arr_big[1].should == @digits
+    @arr_big_neg[1].should == @digits
+    @huge[1].should == "100000000000000000000000000000000000000000001"
+    @infinity.split[1].should == @infinity.to_s
+    @nan.split[1].should == @nan.to_s
+    @infinity_neg.split[1].should == @infinity.to_s
+    @zero.split[1].should == "0"
+    BigDecimal("-0").split[1].should == "0"
+  end
+
+  it "third value: the base (currently always ten)" do
+   @arr[2].should == 10
+   @arr_neg[2].should == 10
+   @arr_big[2].should == 10
+   @arr_big_neg[2].should == 10
+   @huge[2].should == 10
+   @infinity.split[2].should == 10
+   @nan.split[2].should == 10
+   @infinity_neg.split[2].should == 10
+   @zero.split[2].should == 10
+   @zero_neg.split[2].should == 10
+  end
+
+  it "fourth value: the exponent" do
+    @arr[3].should == 1
+    @arr_neg[3].should == 1
+    @arr_big[3].should == 54
+    @arr_big_neg[3].should == 54
+    @huge[3].should == 90000045
+    @infinity.split[3].should == 0
+    @nan.split[3].should == 0
+    @infinity_neg.split[3].should == 0
+    @zero.split[3].should == 0
+    @zero_neg.split[3].should == 0
+  end
+
+end
+
+