Test Sodium::OneTimeAuth

test/sodium/auth_test.rb

@@ -33,7 +33,7 @@
       must_raise Sodium::LengthError
   end
 
-  it 'must raise when verifying an invalid authenticators' do
+  it 'must raise when verifying an invalid authenticator' do
     lambda { self.subject.verify('message', 'blaaah') }.
       must_raise Sodium::LengthError
   end

test/sodium/one_time_auth_test.rb

@@ -0,0 +1,47 @@
+require 'test_helper'
+
+describe Sodium::OneTimeAuth do
+  subject     { self.klass.new(self.key) }
+  let(:klass) { Sodium::OneTimeAuth }
+  let(:key)   { self.klass.key }
+
+  it 'must default to the Poly1305 implementation' do
+    self.klass.implementation.
+      must_equal Sodium::OneTimeAuth::Poly1305
+  end
+
+  it 'must allow access to alternate implementations' do
+    self.klass.implementation(:foo).
+      must_equal nil
+  end
+
+  it 'must instantiate the default implementation' do
+    self.subject.
+      must_be_kind_of Sodium::OneTimeAuth::Poly1305
+  end
+
+  it 'must mint keys from the default implementation' do
+    sodium_mock_default(self.klass) do |klass, mock|
+      mock.expect :[], 0, [:KEYBYTES]
+
+      klass.key.length.must_equal 0
+    end
+  end
+
+  it 'must raise when instantiating with an invalid key' do
+    lambda { self.klass.new(self.key[0..-2]) }.
+      must_raise Sodium::LengthError
+  end
+
+  it 'must raise when verifying an invalid authenticator' do
+    lambda { self.subject.verify('message', 'blaah') }.
+      must_raise Sodium::LengthError
+  end
+
+  it 'must raise when failing to generate an authenticator' do
+    sodium_stub_failure(self.klass, :nacl) do
+      lambda { self.subject.one_time_auth('message') }.
+        must_raise Sodium::CryptoError
+    end
+  end
+end