1 files changed, 141 insertions, 0 deletions
diff --git a/activesupport/test/isolation_test.rb b/activesupport/test/isolation_test.rb
new file mode 100644
index 0000000000..4adf49ff62
--- /dev/null
+++ b/activesupport/test/isolation_test.rb
@@ -0,0 +1,141 @@
+require 'abstract_unit'
+
+# Does awesome
+if ENV['CHILD']
+  class ChildIsolationTest < ActiveSupport::TestCase
+    include ActiveSupport::Testing::Isolation
+
+    def setup
+      @instance = "HELLO"
+    end
+
+    def teardown
+      raise if @boom
+    end
+
+    test "runs the test" do
+      assert true
+    end
+
+    test "captures errors" do
+      raise
+    end
+
+    test "captures failures" do
+      assert false
+    end
+
+    test "first runs in isolation" do
+      assert_nil $x
+      $x = 1
+    end
+
+    test "second runs in isolation" do
+      assert_nil $x
+      $x = 2
+    end
+
+    test "runs with slow tests" do
+      sleep 0.3
+      assert true
+      sleep 0.2
+    end
+
+    test "runs setup" do
+      assert "HELLO", @instance
+    end
+
+    test "runs teardown" do
+      @boom = true
+    end
+
+    test "resets requires one" do
+      assert !defined?(Racc)
+      require 'racc/parser'
+    end
+
+    test "resets requires two" do
+      assert !defined?(Racc)
+      require 'racc/parser'
+    end
+  end
+else
+  class ParentIsolationTest < ActiveSupport::TestCase
+
+    ENV["CHILD"] = "1"
+    OUTPUT = `#{Gem.ruby} -I#{File.dirname(__FILE__)} #{File.expand_path(__FILE__)} -v`
+    ENV.delete("CHILD")
+
+    def setup
+      # Extract the results
+      @results = {}
+      OUTPUT[/Started\n\s*(.*)\s*\nFinished/mi, 1].split(/\s*\n\s*/).each do |result|
+        result =~ %r'^(\w+)\(\w+\):\s*(\.|E|F)$'
+        @results[$1] = { 'E' => :error, '.' => :success, 'F' => :failure }[$2]
+      end
+
+      # Extract the backtraces
+      @backtraces = {}
+      OUTPUT.scan(/^\s*\d+\).*?\n\n/m).each do |backtrace|
+        # \n  1) Error:\ntest_captures_errors(ChildIsolationTest):
+        backtrace =~ %r'\s*\d+\)\s*(Error|Failure):\n(\w+)'i
+        @backtraces[$2] = { :type => $1, :output => backtrace }
+      end
+    end
+
+    def assert_failing(name)
+      assert_equal :failure, @results[name.to_s], "Test #{name} did not fail"
+    end
+
+    def assert_passing(name)
+      assert_equal :success, @results[name.to_s], "Test #{name} did not pass"
+    end
+
+    def assert_erroring(name)
+      assert_equal :error, @results[name.to_s], "Test #{name} did not error"
+    end
+
+    test "has all tests" do
+      assert_equal 10, @results.length
+    end
+
+    test "passing tests are still reported" do
+      assert_passing :test_runs_the_test
+      assert_passing :test_runs_with_slow_tests
+    end
+
+    test "resets global variables" do
+      assert_passing :test_first_runs_in_isolation
+      assert_passing :test_second_runs_in_isolation
+    end
+
+    test "resets requires" do
+      assert_passing :test_resets_requires_one
+      assert_passing :test_resets_requires_two
+    end
+
+    test "erroring tests are still reported" do
+      assert_erroring :test_captures_errors
+    end
+
+    test "runs setup and teardown methods" do
+      assert_passing :test_runs_setup
+      assert_erroring :test_runs_teardown
+    end
+
+    test "correct tests fail" do
+      assert_failing :test_captures_failures
+    end
+
+    test "backtrace is printed for errors" do
+      assert_equal 'Error', @backtraces["test_captures_errors"][:type]
+      assert_match %{isolation_test.rb:21:in `test_captures_errors'}, @backtraces["test_captures_errors"][:output]
+    end
+
+    test "backtrace is printed for failures" do
+      assert_equal 'Failure', @backtraces["test_captures_failures"][:type]
+      assert_match %{isolation_test.rb:25:in `test_captures_failures'}, @backtraces["test_captures_failures"][:output]
+    end
+
+  end
+end
+\ No newline at end of file