Raise a useful exception for incomplete formulae

1 files changed, 5 insertions, 0 deletions

diff --git a/Library/Homebrew/test/test_formula_validation.rb b/Library/Homebrew/test/test_formula_validation.rb
index 5c6bf2888..22b0eb06c 100644
--- a/Library/Homebrew/test/test_formula_validation.rb
+++ b/Library/Homebrew/test/test_formula_validation.rb
@@ -77,4 +77,9 @@ class FormulaValidationTests < Test::Unit::TestCase
       end
     end
   end
+
+  def test_empty_formula_invalid
+    e = assert_raises(RuntimeError) { formula {} }
+    assert_equal "Formulae require at least a URL", e.message
+  end
 end