1 files changed, 37 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_installer.rb b/test/rubygems/test_gem_installer.rb
index bb48f35d9f..ddedd8144c 100644
--- a/test/rubygems/test_gem_installer.rb
+++ b/test/rubygems/test_gem_installer.rb
@@ -190,6 +190,43 @@ load Gem.bin_path('a', 'executable', version)
     Gem::ConfigMap[:bindir] = orig_bindir
   end
 
+  def test_check_executable_overwrite_format_executable
+    @installer.generate_bin
+
+    @spec = Gem::Specification.new do |s|
+      s.files = ['lib/code.rb']
+      s.name = "a"
+      s.version = "3"
+      s.summary = "summary"
+      s.description = "desc"
+      s.require_path = 'lib'
+    end
+
+    open File.join(util_inst_bindir, 'executable'), 'w' do |io|
+     io.write <<-EXEC
+#!/usr/local/bin/ruby
+#
+# This file was generated by RubyGems
+
+gem 'other', version
+     EXEC
+    end
+
+    util_make_exec
+    Gem::Installer.exec_format = 'foo-%s-bar'
+    @installer.gem_dir = @spec.gem_dir
+    @installer.wrappers = true
+    @installer.format_executable = true
+
+    @installer.generate_bin # should not raise
+
+    installed_exec = File.join util_inst_bindir, 'foo-executable-bar'
+    assert File.exist? installed_exec
+
+    wrapper = File.read installed_exec
+    assert_match %r|generated by RubyGems|, wrapper
+  end
+
   def test_check_executable_overwrite_other_gem
     util_conflict_executable true