1 files changed, 54 insertions, 0 deletions
diff --git a/spec/ruby/library/securerandom/hex_spec.rb b/spec/ruby/library/securerandom/hex_spec.rb
new file mode 100644
index 0000000000..691392a7b9
--- /dev/null
+++ b/spec/ruby/library/securerandom/hex_spec.rb
@@ -0,0 +1,54 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+require 'securerandom'
+
+describe "SecureRandom.hex" do
+  it "generates a random hex string of length twice the specified argement" do
+    (1..64).each do |idx|
+      hex = SecureRandom.hex(idx)
+      hex.should be_kind_of(String)
+      hex.length.should == 2 * idx
+    end
+
+    base64 = SecureRandom.hex(5.5)
+    base64.should be_kind_of(String)
+    base64.length.should eql(10)
+  end
+
+  it "returns an empty string when argument is 0" do
+    SecureRandom.hex(0).should == ""
+  end
+
+  it "generates different hex strings with subsequent invocations" do
+    # quick and dirty check, but good enough
+    values = []
+    256.times do
+      hex = SecureRandom.hex
+      # make sure the random values are not repeating
+      values.include?(hex).should == false
+      values << hex
+    end
+  end
+
+  it "generates a random hex string of length 32 if no argument is provided" do
+    SecureRandom.hex.should be_kind_of(String)
+    SecureRandom.hex.length.should == 32
+  end
+
+  it "treats nil agrument as default one and generates a random hex string of length 32" do
+    SecureRandom.hex(nil).should be_kind_of(String)
+    SecureRandom.hex(nil).length.should == 32
+  end
+
+  it "raises ArgumentError on negative arguments" do
+    lambda {
+      SecureRandom.hex(-1)
+    }.should raise_error(ArgumentError)
+  end
+
+  it "tries to convert the passed argument to an Integer using #to_int" do
+    obj = mock("to_int")
+    obj.should_receive(:to_int).and_return(5)
+    SecureRandom.hex(obj).size.should eql(10)
+  end
+end