1 files changed, 48 insertions, 0 deletions
diff --git a/spec/rubyspec/core/bignum/to_s_spec.rb b/spec/rubyspec/core/bignum/to_s_spec.rb
new file mode 100644
index 0000000000..524639adb6
--- /dev/null
+++ b/spec/rubyspec/core/bignum/to_s_spec.rb
@@ -0,0 +1,48 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Bignum#to_s when given a base" do
+  it "returns self converted to a String using the given base" do
+    a = 2**64
+    a.to_s(2).should == "10000000000000000000000000000000000000000000000000000000000000000"
+    a.to_s(8).should == "2000000000000000000000"
+    a.to_s(16).should == "10000000000000000"
+    a.to_s(32).should == "g000000000000"
+  end
+
+  it "raises an ArgumentError if the base is less than 2 or higher than 36" do
+    lambda { 123.to_s(-1) }.should raise_error(ArgumentError)
+    lambda { 123.to_s(0) }.should raise_error(ArgumentError)
+    lambda { 123.to_s(1) }.should raise_error(ArgumentError)
+    lambda { 123.to_s(37) }.should raise_error(ArgumentError)
+  end
+end
+
+describe "Bignum#to_s when given no base" do
+  it "returns self converted to a String using base 10" do
+    bignum_value(9).to_s.should == "9223372036854775817"
+    bignum_value.to_s.should == "9223372036854775808"
+    (-bignum_value(675)).to_s.should == "-9223372036854776483"
+  end
+end
+
+with_feature :encoding do
+  describe "Bignum#to_s" do
+    before :each do
+      @internal = Encoding.default_internal
+    end
+
+    after :each do
+      Encoding.default_internal = @internal
+    end
+
+    it "returns a String in US-ASCII encoding when Encoding.default_internal is nil" do
+      Encoding.default_internal = nil
+      bignum_value.to_s.encoding.should equal(Encoding::US_ASCII)
+    end
+
+    it "returns a String in US-ASCII encoding when Encoding.default_internal is not nil" do
+      Encoding.default_internal = Encoding::IBM437
+      bignum_value.to_s.encoding.should equal(Encoding::US_ASCII)
+    end
+  end
+end