1 files changed, 104 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/ceil_spec.rb b/spec/ruby/library/bigdecimal/ceil_spec.rb
new file mode 100644
index 0000000000..d8829411b9
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/ceil_spec.rb
@@ -0,0 +1,104 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'bigdecimal'
+
+describe "BigDecimal#ceil" do
+  before :each do
+    @zero = BigDecimal("0")
+    @one = BigDecimal("1")
+    @three = BigDecimal("3")
+    @four = BigDecimal("4")
+    @mixed = BigDecimal("1.23456789")
+    @mixed_big = BigDecimal("1.23456789E100")
+    @pos_int = BigDecimal("2E5555")
+    @neg_int = BigDecimal("-2E5555")
+    @pos_frac = BigDecimal("2E-9999")
+    @neg_frac = BigDecimal("-2E-9999")
+
+    @infinity = BigDecimal("Infinity")
+    @infinity_neg = BigDecimal("-Infinity")
+    @nan = BigDecimal("NaN")
+    @zero_pos = BigDecimal("+0")
+    @zero_neg = BigDecimal("-0")
+  end
+
+  it "returns an Integer, if n is unspecified" do
+    @mixed.ceil.kind_of?(Integer).should == true
+  end
+
+  it "returns a BigDecimal, if n is specified" do
+    @pos_int.ceil(2).kind_of?(BigDecimal).should == true
+  end
+
+  it "returns the smallest integer greater or equal to self, if n is unspecified" do
+    @pos_int.ceil.should == @pos_int
+    @neg_int.ceil.should == @neg_int
+    @pos_frac.ceil.should == BigDecimal("1")
+    @neg_frac.ceil.should == @zero
+    @zero.ceil.should == 0
+    @zero_pos.ceil.should == @zero_pos
+    @zero_neg.ceil.should == @zero_neg
+
+
+    BigDecimal('2.3').ceil.should == 3
+    BigDecimal('2.5').ceil.should == 3
+    BigDecimal('2.9999').ceil.should == 3
+    BigDecimal('-2.3').ceil.should == -2
+    BigDecimal('-2.5').ceil.should == -2
+    BigDecimal('-2.9999').ceil.should == -2
+  end
+
+  it "raise exception, if self is special value" do
+    lambda { @infinity.ceil }.should raise_error(FloatDomainError)
+    lambda { @infinity_neg.ceil }.should raise_error(FloatDomainError)
+    lambda { @nan.ceil }.should raise_error(FloatDomainError)
+  end
+
+  it "returns n digits right of the decimal point if given n > 0" do
+    @mixed.ceil(1).should == BigDecimal("1.3")
+    @mixed.ceil(5).should == BigDecimal("1.23457")
+
+    BigDecimal("-0.03").ceil(1).should == BigDecimal("0")
+    BigDecimal("0.03").ceil(1).should == BigDecimal("0.1")
+
+    BigDecimal("23.45").ceil(0).should == BigDecimal('24')
+    BigDecimal("23.45").ceil(1).should == BigDecimal('23.5')
+    BigDecimal("23.45").ceil(2).should == BigDecimal('23.45')
+
+    BigDecimal("-23.45").ceil(0).should == BigDecimal('-23')
+    BigDecimal("-23.45").ceil(1).should == BigDecimal('-23.4')
+    BigDecimal("-23.45").ceil(2).should == BigDecimal('-23.45')
+
+    BigDecimal("2E-10").ceil(0).should == @one
+    BigDecimal("2E-10").ceil(9).should == BigDecimal('1E-9')
+    BigDecimal("2E-10").ceil(10).should == BigDecimal('2E-10')
+    BigDecimal("2E-10").ceil(11).should == BigDecimal('2E-10')
+
+    (1..10).each do |n|
+      # 0.4, 0.34, 0.334, etc.
+      (@one.div(@three,20)).ceil(n).should == BigDecimal("0.#{'3'*(n-1)}4")
+      # 1.4, 1.34, 1.334, etc.
+      (@four.div(@three,20)).ceil(n).should == BigDecimal("1.#{'3'*(n-1)}4")
+      (BigDecimal('31').div(@three,20)).ceil(n).should == BigDecimal("10.#{'3'*(n-1)}4")
+    end
+    (1..10).each do |n|
+      # -0.4, -0.34, -0.334, etc.
+      (-@one.div(@three,20)).ceil(n).should == BigDecimal("-0.#{'3'* n}")
+    end
+    (1..10).each do |n|
+      (@three.div(@one,20)).ceil(n).should == @three
+    end
+    (1..10).each do |n|
+      (-@three.div(@one,20)).ceil(n).should == -@three
+    end
+  end
+
+  it "sets n digits left of the decimal point to 0, if given n < 0" do
+    BigDecimal("13345.234").ceil(-2).should == BigDecimal("13400.0")
+    @mixed_big.ceil(-99).should == BigDecimal("0.13E101")
+    @mixed_big.ceil(-100).should == BigDecimal("0.2E101")
+    @mixed_big.ceil(-95).should == BigDecimal("0.123457E101")
+    BigDecimal("1E10").ceil(-30).should == BigDecimal('1E30')
+    BigDecimal("-1E10").ceil(-30).should == @zero
+  end
+
+end