diff --git a/Library/Homebrew/test/test_software_spec.rb b/Library/Homebrew/test/test_software_spec.rb
new file mode 100644
index 0000000000..8e23bc4a18
--- /dev/null
+++ b/Library/Homebrew/test/test_software_spec.rb
@@ -0,0 +1,156 @@
+require 'testing_env'
+require 'formula_support'
+
+# XXX: grrrrr
+require 'hardware'
+require 'bottles'
+
+class SoftwareSpecTests < Test::Unit::TestCase
+  include VersionAssertions
+
+  def setup
+    @spec = SoftwareSpec.new
+  end
+
+  def test_url
+    @spec.url('foo')
+    assert_equal 'foo', @spec.url
+  end
+
+  def test_url_with_specs
+    @spec.url('foo', :branch => 'master')
+    assert_equal 'foo', @spec.url
+    assert_equal({ :branch => 'master' }, @spec.specs)
+  end
+
+  def test_url_with_custom_download_strategy
+    strategy = Class.new(AbstractDownloadStrategy)
+    @spec.url('foo', :using => strategy)
+    assert_equal 'foo', @spec.url
+    assert_equal strategy, @spec.download_strategy
+  end
+
+  def test_url_with_specs_and_download_strategy
+    strategy = Class.new(AbstractDownloadStrategy)
+    @spec.url('foo', :using => strategy, :branch => 'master')
+    assert_equal 'foo', @spec.url
+    assert_equal({ :branch => 'master' }, @spec.specs)
+    assert_equal strategy, @spec.download_strategy
+  end
+
+  def test_version
+    @spec.version('1.0')
+    assert_version_equal '1.0', @spec.version
+  end
+
+  def test_version_from_url
+    @spec.url('http://foo.com/bar-1.0.tar.gz')
+    assert_version_equal '1.0', @spec.version
+  end
+
+  def test_version_with_scheme
+    scheme = Class.new(Version)
+    @spec.version('1.0' => scheme)
+    assert_version_equal '1.0', @spec.version
+    assert_instance_of scheme, @spec.version
+  end
+
+  def test_mirrors
+    assert_empty @spec.mirrors
+    @spec.mirror('foo')
+    @spec.mirror('bar')
+    assert_equal 'foo', @spec.mirrors.shift
+    assert_equal 'bar', @spec.mirrors.shift
+  end
+
+  def test_checksum_setters
+    assert_nil @spec.checksum
+    @spec.sha1('baadidea'*5)
+    assert_equal Checksum.new(:sha1, 'baadidea'*5), @spec.checksum
+    @spec.sha256('baadidea'*8)
+    assert_equal Checksum.new(:sha256, 'baadidea'*8), @spec.checksum
+  end
+
+  def test_download_strategy
+    strategy = Object.new
+    DownloadStrategyDetector.
+      expects(:detect).with("foo", nil).returns(strategy)
+    @spec.url("foo")
+    assert_equal strategy, @spec.download_strategy
+  end
+
+  def test_verify_download_integrity_missing
+    fn = Object.new
+    checksum = @spec.sha1('baadidea'*5)
+
+    fn.expects(:verify_checksum).
+      with(checksum).raises(ChecksumMissingError)
+    fn.expects(:sha1)
+
+    shutup { @spec.verify_download_integrity(fn) }
+  end
+
+  def test_verify_download_integrity_mismatch
+    fn = Object.new
+    checksum = @spec.sha1('baadidea'*5)
+
+    fn.expects(:verify_checksum).with(checksum).
+      raises(ChecksumMismatchError.new(checksum, Object.new))
+
+    shutup do
+      assert_raises(ChecksumMismatchError) do
+        @spec.verify_download_integrity(fn)
+      end
+    end
+  end
+end
+
+class HeadSoftwareSpecTests < Test::Unit::TestCase
+  include VersionAssertions
+
+  def setup
+    @spec = HeadSoftwareSpec.new
+  end
+
+  def test_version
+    assert_version_equal 'HEAD', @spec.version
+  end
+
+  def test_verify_download_integrity
+    assert_nil @spec.verify_download_integrity(Object.new)
+  end
+end
+
+class BottleTests < Test::Unit::TestCase
+  include VersionAssertions
+
+  def setup
+    @spec = Bottle.new
+  end
+
+  def test_checksum_setters
+    checksums = {
+      :snow_leopard_32 => 'deadbeef'*5,
+      :snow_leopard    => 'faceb00c'*5,
+      :lion            => 'baadf00d'*5,
+      :mountain_lion   => '8badf00d'*5,
+    }
+
+    checksums.each_pair do |cat, sha1|
+      @spec.sha1(sha1 => cat)
+    end
+
+    checksums.each_pair do |cat, sha1|
+      assert_equal Checksum.new(:sha1, sha1),
+        @spec.instance_variable_get(:@sha1)[cat]
+    end
+  end
+
+  def test_other_setters
+    double = Object.new
+    %w{root_url prefix cellar revision}.each do |method|
+      @spec.send(method, double)
+      assert_equal double, @spec.send(method)
+    end
+  end
+end