6 files changed, 421 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/shared/eql.rb b/spec/ruby/library/bigdecimal/shared/eql.rb
new file mode 100644
index 0000000000..eaad272e9a
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/shared/eql.rb
@@ -0,0 +1,61 @@
+require 'bigdecimal'
+
+describe :bigdecimal_eql, shared: true do
+  before :each do
+    @bg6543_21 = BigDecimal.new("6543.21")
+    @bg5667_19 = BigDecimal.new("5667.19")
+    @a = BigDecimal("1.0000000000000000000000000000000000000000005")
+    @b = BigDecimal("1.00000000000000000000000000000000000000000005")
+    @bigint = BigDecimal("1000.0")
+    @nan = BigDecimal("NaN")
+    @infinity = BigDecimal("Infinity")
+    @infinity_minus = BigDecimal("-Infinity")
+  end
+
+  it "tests for equality" do
+    @bg6543_21.send(@method, @bg6543_21).should == true
+    @a.send(@method, @a).should == true
+    @a.send(@method, @b).should == false
+    @bg6543_21.send(@method, @a).should == false
+    @bigint.send(@method, 1000).should == true
+  end
+
+  it "returns false for NaN as it is never equal to any number" do
+    @nan.send(@method, @nan).should == false
+    @a.send(@method, @nan).should == false
+    @nan.send(@method, @a).should == false
+    @nan.send(@method, @infinity).should == false
+    @nan.send(@method, @infinity_minus).should == false
+    @infinity.send(@method, @nan).should == false
+    @infinity_minus.send(@method, @nan).should == false
+  end
+
+  it "returns true for infinity values with the same sign" do
+    @infinity.send(@method, @infinity).should == true
+    @infinity.send(@method, BigDecimal("Infinity")).should == true
+    BigDecimal("Infinity").send(@method, @infinity).should == true
+
+    @infinity_minus.send(@method, @infinity_minus).should == true
+    @infinity_minus.send(@method, BigDecimal("-Infinity")).should == true
+    BigDecimal("-Infinity").send(@method, @infinity_minus).should == true
+  end
+
+  it "returns false for infinity values with different signs" do
+    @infinity.send(@method, @infinity_minus).should == false
+    @infinity_minus.send(@method, @infinity).should == false
+  end
+
+  it "returns false when infinite value compared to finite one" do
+    @infinity.send(@method, @a).should == false
+    @infinity_minus.send(@method, @a).should == false
+
+    @a.send(@method, @infinity).should == false
+    @a.send(@method, @infinity_minus).should == false
+  end
+
+  it "returns false when compared objects that can not be coerced into BigDecimal" do
+    @infinity.send(@method, nil).should == false
+    @bigint.send(@method, nil).should == false
+    @nan.send(@method, nil).should == false
+  end
+end
diff --git a/spec/ruby/library/bigdecimal/shared/modulo.rb b/spec/ruby/library/bigdecimal/shared/modulo.rb
new file mode 100644
index 0000000000..78ebe8360d
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/shared/modulo.rb
@@ -0,0 +1,116 @@
+require 'bigdecimal'
+
+describe :bigdecimal_modulo, shared: true do
+  before :each do
+    @one = BigDecimal("1")
+    @zero = BigDecimal("0")
+    @zero_pos = BigDecimal("+0")
+    @zero_neg = BigDecimal("-0")
+    @two = BigDecimal("2")
+    @three = BigDecimal("3")
+    @mixed = BigDecimal("1.23456789")
+    @nan = BigDecimal("NaN")
+    @infinity = BigDecimal("Infinity")
+    @infinity_minus = BigDecimal("-Infinity")
+    @one_minus = BigDecimal("-1")
+    @frac_1 = BigDecimal("1E-9999")
+    @frac_2 = BigDecimal("0.9E-9999")
+  end
+
+  it "returns self modulo other" do
+    bd6543 = BigDecimal.new("6543.21")
+    bd5667 = BigDecimal.new("5667.19")
+    a = BigDecimal("1.0000000000000000000000000000000000000000005")
+    b = BigDecimal("1.00000000000000000000000000000000000000000005")
+
+    bd6543.send(@method, 137).should == BigDecimal("104.21")
+    bd5667.send(@method, bignum_value).should == 5667.19
+    bd6543.send(@method, BigDecimal("137.24")).should == BigDecimal("92.93")
+    bd6543.send(@method, 137).should be_close(6543.21.%(137), TOLERANCE)
+    bd6543.send(@method, 137).should == bd6543 % 137
+    bd5667.send(@method, bignum_value).should be_close(5667.19.%(0xffffffff), TOLERANCE)
+    bd5667.send(@method, bignum_value).should == bd5667.%(0xffffffff)
+    bd6543.send(@method, 137.24).should be_close(6543.21.%(137.24), TOLERANCE)
+    a.send(@method, b).should == BigDecimal("0.45E-42")
+    @zero.send(@method, @one).should == @zero
+    @zero.send(@method, @one_minus).should == @zero
+    @two.send(@method, @one).should == @zero
+    @one.send(@method, @two).should == @one
+    @frac_1.send(@method, @one).should == @frac_1
+    @frac_2.send(@method, @one).should == @frac_2
+    @one_minus.send(@method, @one_minus).should == @zero
+    @one_minus.send(@method, @one).should == @zero
+    @one_minus.send(@method, @two).should == @one
+    @one.send(@method, -@two).should == -@one
+
+    @one_minus.modulo(BigDecimal('0.9')).should == BigDecimal('0.8')
+    @one.modulo(BigDecimal('-0.9')).should == BigDecimal('-0.8')
+
+    @one_minus.modulo(BigDecimal('0.8')).should == BigDecimal('0.6')
+    @one.modulo(BigDecimal('-0.8')).should == BigDecimal('-0.6')
+
+    @one_minus.modulo(BigDecimal('0.6')).should == BigDecimal('0.2')
+    @one.modulo(BigDecimal('-0.6')).should == BigDecimal('-0.2')
+
+    @one_minus.modulo(BigDecimal('0.5')).should == @zero
+    @one.modulo(BigDecimal('-0.5')).should == @zero
+    @one_minus.modulo(BigDecimal('-0.5')).should == @zero
+
+    @one_minus.modulo(BigDecimal('0.4')).should == BigDecimal('0.2')
+    @one.modulo(BigDecimal('-0.4')).should == BigDecimal('-0.2')
+
+    @one_minus.modulo(BigDecimal('0.3')).should == BigDecimal('0.2')
+    @one_minus.modulo(BigDecimal('0.2')).should == @zero
+  end
+
+  it "returns a [Float value] when the argument is Float" do
+    @two.send(@method, 2.0).should == 0.0
+    @one.send(@method, 2.0).should == 1.0
+    res = @two.send(@method, 5.0)
+    res.kind_of?(BigDecimal).should == true
+  end
+
+  it "returns NaN if NaN is involved" do
+    @nan.send(@method, @nan).nan?.should == true
+    @nan.send(@method, @one).nan?.should == true
+    @one.send(@method, @nan).nan?.should == true
+    @infinity.send(@method, @nan).nan?.should == true
+    @nan.send(@method, @infinity).nan?.should == true
+  end
+
+  it "returns NaN if the dividend is Infinity" do
+    @infinity.send(@method, @infinity).nan?.should == true
+    @infinity.send(@method, @one).nan?.should == true
+    @infinity.send(@method, @mixed).nan?.should == true
+    @infinity.send(@method, @one_minus).nan?.should == true
+    @infinity.send(@method, @frac_1).nan?.should == true
+
+    @infinity_minus.send(@method, @infinity_minus).nan?.should == true
+    @infinity_minus.send(@method, @one).nan?.should == true
+
+    @infinity.send(@method, @infinity_minus).nan?.should == true
+    @infinity_minus.send(@method, @infinity).nan?.should == true
+  end
+
+  it "returns the dividend if the divisor is Infinity" do
+    @one.send(@method, @infinity).should == @one
+    @one.send(@method, @infinity_minus).should == @one
+    @frac_2.send(@method, @infinity_minus).should == @frac_2
+  end
+
+  it "raises TypeError if the argument cannot be coerced to BigDecimal" do
+    lambda {
+      @one.send(@method, '2')
+    }.should raise_error(TypeError)
+  end
+end
+
+describe :bigdecimal_modulo_zerodivisionerror, shared: true do
+  it "raises ZeroDivisionError if other is zero" do
+    bd5667 = BigDecimal.new("5667.19")
+
+    lambda { bd5667.send(@method, 0) }.should raise_error(ZeroDivisionError)
+    lambda { bd5667.send(@method, BigDecimal("0")) }.should raise_error(ZeroDivisionError)
+    lambda { @zero.send(@method, @zero) }.should raise_error(ZeroDivisionError)
+  end
+end
diff --git a/spec/ruby/library/bigdecimal/shared/mult.rb b/spec/ruby/library/bigdecimal/shared/mult.rb
new file mode 100644
index 0000000000..b94c9385de
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/shared/mult.rb
@@ -0,0 +1,97 @@
+require 'bigdecimal'
+
+describe :bigdecimal_mult, shared: true do
+  before :each do
+    @zero = BigDecimal "0"
+    @zero_pos = BigDecimal "+0"
+    @zero_neg = BigDecimal "-0"
+
+    @one = BigDecimal "1"
+    @mixed = BigDecimal "1.23456789"
+    @pos_int = BigDecimal "2E5555"
+    @neg_int = BigDecimal "-2E5555"
+    @pos_frac = BigDecimal "2E-9999"
+    @neg_frac = BigDecimal "-2E-9999"
+    @nan = BigDecimal "NaN"
+    @infinity = BigDecimal "Infinity"
+    @infinity_minus = BigDecimal "-Infinity"
+    @one_minus = BigDecimal "-1"
+    @frac_1 = BigDecimal "1E-99999"
+    @frac_2 = BigDecimal "0.9E-99999"
+
+    @e3_minus = BigDecimal "3E-20001"
+    @e = BigDecimal "1.00000000000000000000123456789"
+    @tolerance = @e.sub @one, 1000
+    @tolerance2 = BigDecimal "30001E-20005"
+
+    @special_vals = [@infinity, @infinity_minus, @nan]
+    @regular_vals = [ @one, @mixed, @pos_int, @neg_int,
+                      @pos_frac, @neg_frac, @one_minus,
+                      @frac_1, @frac_2
+                    ]
+    @zeroes = [@zero, @zero_pos, @zero_neg]
+  end
+
+  it "returns zero of appropriate sign if self or argument is zero" do
+    @zero.send(@method, @zero, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    @zero_neg.send(@method, @zero_neg, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    @zero.send(@method, @zero_neg, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
+    @zero_neg.send(@method, @zero, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
+
+    @one.send(@method, @zero, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    @one.send(@method, @zero_neg, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
+
+    @zero.send(@method, @one, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    @zero.send(@method, @one_minus, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
+    @zero_neg.send(@method, @one_minus, *@object).sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    @zero_neg.send(@method, @one, *@object).sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
+  end
+
+  it "returns NaN if NaN is involved" do
+    values = @regular_vals + @zeroes
+
+    values.each do |val|
+      @nan.send(@method, val, *@object).nan?.should == true
+      val.send(@method, @nan, *@object).nan?.should == true
+    end
+  end
+
+  it "returns zero if self or argument is zero" do
+    values = @regular_vals + @zeroes
+
+    values.each do |val|
+      @zeroes.each do |zero|
+        zero.send(@method, val, *@object).should == 0
+        zero.send(@method, val, *@object).zero?.should == true
+        val.send(@method, zero, *@object).should == 0
+        val.send(@method, zero, *@object).zero?.should == true
+      end
+    end
+  end
+
+  it "returns infinite value if self or argument is infinite" do
+    values = @regular_vals
+    infs = [@infinity, @infinity_minus]
+
+    values.each do |val|
+      infs.each do |inf|
+        inf.send(@method, val, *@object).finite?.should == false
+        val.send(@method, inf, *@object).finite?.should == false
+      end
+    end
+
+    @infinity.send(@method, @infinity, *@object).infinite?.should == 1
+    @infinity_minus.send(@method, @infinity_minus, *@object).infinite?.should == 1
+    @infinity.send(@method, @infinity_minus, *@object).infinite?.should == -1
+    @infinity_minus.send(@method, @infinity, *@object).infinite?.should == -1
+    @infinity.send(@method, @one, *@object).infinite?.should == 1
+    @infinity_minus.send(@method, @one, *@object).infinite?.should == -1
+  end
+
+  it "returns NaN if the result is undefined" do
+    @zero.send(@method, @infinity, *@object).nan?.should == true
+    @zero.send(@method, @infinity_minus, *@object).nan?.should == true
+    @infinity.send(@method, @zero, *@object).nan?.should == true
+    @infinity_minus.send(@method, @zero, *@object).nan?.should == true
+  end
+end
diff --git a/spec/ruby/library/bigdecimal/shared/power.rb b/spec/ruby/library/bigdecimal/shared/power.rb
new file mode 100644
index 0000000000..a4848fb2e2
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/shared/power.rb
@@ -0,0 +1,72 @@
+require 'bigdecimal'
+
+describe :bigdecimal_power, shared: true do
+  it "powers of self" do
+    e3_minus = BigDecimal("3E-20001")
+    e3_minus_power_2 = BigDecimal("9E-40002")
+    e3_plus = BigDecimal("3E20001")
+    e2_plus = BigDecimal("2E40001")
+    e5_minus = BigDecimal("5E-40002")
+    e = BigDecimal("1.00000000000000000000123456789")
+    one = BigDecimal("1")
+    ten = BigDecimal("10")
+    # The tolerance is dependent upon the size of BASE_FIG
+    tolerance = BigDecimal("1E-70")
+    ten_powers = BigDecimal("1E10000")
+    pi = BigDecimal("3.14159265358979")
+    e3_minus.send(@method, 2).should == e3_minus_power_2
+    e3_plus.send(@method, 0).should == 1
+    e3_minus.send(@method, 1).should == e3_minus
+    e2_plus.send(@method, -1).should == e5_minus
+    e2_plus.send(@method, -1).should == e5_minus.power(1)
+    (e2_plus.send(@method, -1) * e5_minus.send(@method, -1)).should == 1
+    e.send(@method, 2).should == e * e
+    e.send(@method, -1).should be_close(one.div(e, 120), tolerance)
+    ten.send(@method, 10000).should == ten_powers
+    pi.send(@method, 10).should be_close(Math::PI ** 10, TOLERANCE)
+  end
+
+  it "powers of 1 equal 1" do
+    one = BigDecimal("1")
+    one.send(@method, 0).should == 1
+    one.send(@method, 1).should == 1
+    one.send(@method, 10).should == 1
+    one.send(@method, -10).should == 1
+  end
+
+  it "0 to power of 0 is 1" do
+    zero = BigDecimal("0")
+    zero.send(@method, 0).should == 1
+  end
+
+  it "0 to powers < 0 is Infinity" do
+    zero = BigDecimal("0")
+    infinity = BigDecimal("Infinity")
+    zero.send(@method, -10).should == infinity
+    zero.send(@method, -1).should == infinity
+  end
+
+  it "other powers of 0 are 0" do
+    zero = BigDecimal("0")
+    zero.send(@method, 1).should == 0
+    zero.send(@method, 10).should == 0
+  end
+
+  it "returns NaN if self is NaN" do
+    BigDecimal("NaN").send(@method, -5).nan?.should == true
+    BigDecimal("NaN").send(@method, 5).nan?.should == true
+  end
+
+  it "returns 0.0 if self is infinite and argument is negative" do
+    BigDecimal("Infinity").send(@method, -5).should == 0
+    BigDecimal("-Infinity").send(@method, -5).should == 0
+  end
+
+  it "returns infinite if self is infinite and argument is positive" do
+    infinity = BigDecimal("Infinity")
+    BigDecimal("Infinity").send(@method, 4).should == infinity
+    BigDecimal("-Infinity").send(@method, 4).should == infinity
+    BigDecimal("Infinity").send(@method, 5).should == infinity
+    BigDecimal("-Infinity").send(@method, 5).should == -infinity
+  end
+end
diff --git a/spec/ruby/library/bigdecimal/shared/quo.rb b/spec/ruby/library/bigdecimal/shared/quo.rb
new file mode 100644
index 0000000000..cb51c10d71
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/shared/quo.rb
@@ -0,0 +1,59 @@
+require 'bigdecimal'
+
+describe :bigdecimal_quo, shared: true do
+  before :each do
+    @one = BigDecimal("1")
+    @zero = BigDecimal("0")
+    @zero_plus = BigDecimal("+0")
+    @zero_minus = BigDecimal("-0")
+    @two = BigDecimal("2")
+    @three = BigDecimal("3")
+    @eleven = BigDecimal("11")
+    @nan = BigDecimal("NaN")
+    @infinity = BigDecimal("Infinity")
+    @infinity_minus = BigDecimal("-Infinity")
+    @one_minus = BigDecimal("-1")
+    @frac_1 = BigDecimal("1E-99999")
+    @frac_2 = BigDecimal("0.9E-99999")
+  end
+
+  it "returns a / b" do
+    @two.send(@method, @one, *@object).should == @two
+    @one.send(@method, @two, *@object).should == BigDecimal("0.5")
+    @eleven.send(@method, @three, *@object).should be_close(@three + (@two / @three), TOLERANCE)
+    @one.send(@method, @one_minus, *@object).should == @one_minus
+    @one_minus.send(@method, @one_minus, *@object).should == @one
+    @frac_2.send(@method, @frac_1, *@object).should == BigDecimal("0.9")
+    @frac_1.send(@method, @frac_1, *@object).should == @one
+    @one.send(@method, BigDecimal('-2E5555'), *@object).should == BigDecimal('-0.5E-5555')
+    @one.send(@method, BigDecimal('2E-5555'), *@object).should == BigDecimal('0.5E5555')
+  end
+
+  it "returns 0 if divided by Infinity" do
+    @zero.send(@method, @infinity, *@object).should == 0
+    @frac_2.send(@method, @infinity, *@object).should == 0
+  end
+
+  it "returns (+|-) Infinity if (+|-) Infinity divided by one" do
+    @infinity_minus.send(@method, @one, *@object).should == @infinity_minus
+    @infinity.send(@method, @one, *@object).should == @infinity
+    @infinity_minus.send(@method, @one_minus, *@object).should == @infinity
+  end
+
+  it "returns NaN if Infinity / ((+|-) Infinity)" do
+    @infinity.send(@method, @infinity_minus, *@object).nan?.should == true
+    @infinity_minus.send(@method, @infinity, *@object).nan?.should == true
+  end
+
+  it "returns (+|-) Infinity if divided by zero" do
+    @one.send(@method, @zero, *@object).should == @infinity
+    @one.send(@method, @zero_plus, *@object).should == @infinity
+    @one.send(@method, @zero_minus, *@object).should == @infinity_minus
+  end
+
+  it "returns NaN if zero is divided by zero" do
+    @zero.send(@method, @zero, *@object).nan?.should == true
+    @zero_minus.send(@method, @zero_plus, *@object).nan?.should == true
+    @zero_plus.send(@method, @zero_minus, *@object).nan?.should == true
+  end
+end
diff --git a/spec/ruby/library/bigdecimal/shared/to_int.rb b/spec/ruby/library/bigdecimal/shared/to_int.rb
new file mode 100644
index 0000000000..729a25f511
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/shared/to_int.rb
@@ -0,0 +1,16 @@
+require 'bigdecimal'
+
+describe :bigdecimal_to_int , shared: true do
+  it "raises FloatDomainError if BigDecimal is infinity or NaN" do
+    lambda { BigDecimal("Infinity").send(@method) }.should raise_error(FloatDomainError)
+    lambda { BigDecimal("NaN").send(@method) }.should raise_error(FloatDomainError)
+  end
+
+  it "returns Integer or Bignum otherwise" do
+    BigDecimal("3E-20001").send(@method).should == 0
+    BigDecimal("2E4000").send(@method).should == 2 * 10 ** 4000
+    BigDecimal("2").send(@method).should == 2
+    BigDecimal("2E10").send(@method).should == 20000000000
+    BigDecimal("3.14159").send(@method).should == 3
+  end
+end