update test for Homebrew/homebrew-emacs#158

Closes Homebrew/homebrew#48131.

Signed-off-by: Alex Dunn <dunn.alex@gmail.com>

Library/Homebrew/test/test_formula_installer.rb

@@ -40,6 +40,8 @@ class InstallTests < Homebrew::TestCase
   def test_a_basic_install
     temporary_install(Testball.new) do |f|
       # Test that things made it into the Keg
+      assert_predicate f.prefix+"readme", :exist?
+
       assert_predicate f.bin, :directory?
       assert_equal 3, f.bin.children.length
 
@@ -48,6 +50,8 @@ class InstallTests < Homebrew::TestCase
 
       refute_predicate f.prefix+"main.c", :exist?
 
+      refute_predicate f.prefix+"license", :exist?
+
       # Test that things make it into the Cellar
       keg = Keg.new f.prefix
       keg.link

Library/Homebrew/test/testball.rb

@@ -10,5 +10,6 @@ class Testball < Formula
   def install
     prefix.install "bin"
     prefix.install "libexec"
+    Dir.chdir "doc"
   end
 end