display detailed information in inline reporting

The errors message only was not displayed, as if it did not use the inline reporting,
modified to also information the method name and the like in error are displayed.

```
# before
Failed assertion, no message given.

bin/rails test test/models/user_test.rb:5
```

```
# after
Failure:
UserTest#test_the_truth:
Failed assertion, no message given.

bin/rails test test/models/user_test.rb:5
```

5 files changed, 19 insertions, 7 deletions

diff --git a/railties/lib/rails/test_unit/reporter.rb b/railties/lib/rails/test_unit/reporter.rb
index 00ea32d1b8..695c67756b 100644
--- a/railties/lib/rails/test_unit/reporter.rb
+++ b/railties/lib/rails/test_unit/reporter.rb
@@ -12,7 +12,7 @@ module Rails
       if output_inline? && result.failure && (!result.skipped? || options[:verbose])
         io.puts
         io.puts
-        io.puts result.failures.map(&:message)
+        io.puts format_failures(result)
         io.puts
         io.puts format_rerun_snippet(result)
         io.puts
@@ -56,6 +56,12 @@ module Rails
         options[:fail_fast]
       end
 
+      def format_failures(result)
+        result.failures.map do |failure|
+          "#{failure.result_label}:\n#{result.class}##{result.name}:\n#{failure.message}\n"
+        end
+      end
+
       def format_rerun_snippet(result)
         # Try to extract path to assertion from backtrace.
         if result.location =~ /\[(.*)\]\z/
diff --git a/railties/test/application/test_runner_test.rb b/railties/test/application/test_runner_test.rb
index 4965ab7da0..92a9b99fd8 100644
--- a/railties/test/application/test_runner_test.rb
+++ b/railties/test/application/test_runner_test.rb
@@ -344,7 +344,8 @@ module ApplicationTests
       create_test_file :models, 'post', pass: false
 
       output = run_test_command('test/models/post_test.rb')
-      assert_match %r{Running:\n\nPostTest\nF\n\nwups!\n\nbin/rails test test/models/post_test.rb:6}, output
+      expect = %r{Running:\n\nPostTest\nF\n\nFailure:\nPostTest#test_truth:\nwups!\n\nbin/rails test test/models/post_test.rb:6\n\n\n\n}
+      assert_match expect, output
     end
 
     def test_only_inline_failure_output
diff --git a/railties/test/generators/plugin_test_runner_test.rb b/railties/test/generators/plugin_test_runner_test.rb
index 716728819e..f0fb63c208 100644
--- a/railties/test/generators/plugin_test_runner_test.rb
+++ b/railties/test/generators/plugin_test_runner_test.rb
@@ -71,7 +71,8 @@ class PluginTestRunnerTest < ActiveSupport::TestCase
     create_test_file 'post', pass: false
 
     output = run_test_command('test/post_test.rb')
-    assert_match %r{Running:\n\nPostTest\nF\n\nwups!\n\nbin/test (/private)?#{plugin_path}/test/post_test.rb:6}, output
+    expect = %r{Running:\n\nPostTest\nF\n\nFailure:\nPostTest#test_truth:\nwups!\n\nbin/test (/private)?#{plugin_path}/test/post_test.rb:6}
+    assert_match expect, output
   end
 
   def test_only_inline_failure_output
diff --git a/railties/test/generators/test_runner_in_engine_test.rb b/railties/test/generators/test_runner_in_engine_test.rb
index 641c5d0835..69906b962b 100644
--- a/railties/test/generators/test_runner_in_engine_test.rb
+++ b/railties/test/generators/test_runner_in_engine_test.rb
@@ -17,7 +17,8 @@ class TestRunnerInEngineTest < ActiveSupport::TestCase
     create_test_file 'post', pass: false
 
     output = run_test_command('test/post_test.rb')
-    assert_match %r{Running:\n\nPostTest\nF\n\nwups!\n\nbin/rails test test/post_test.rb:6}, output
+    expect = %r{Running:\n\nPostTest\nF\n\nFailure:\nPostTest#test_truth:\nwups!\n\nbin/rails test test/post_test.rb:6}
+    assert_match expect, output
   end
 
   private
diff --git a/railties/test/test_unit/reporter_test.rb b/railties/test/test_unit/reporter_test.rb
index e517d8dd0b..3ff7cd18cd 100644
--- a/railties/test/test_unit/reporter_test.rb
+++ b/railties/test/test_unit/reporter_test.rb
@@ -61,14 +61,16 @@ class TestUnitReporterTest < ActiveSupport::TestCase
     @reporter.record(failed_test)
     @reporter.report
 
-    assert_match %r{\A\n\nboo\n\nbin/rails test .*test/test_unit/reporter_test.rb:\d+\n\n\z}, @output.string
+    expect = %r{\A\n\nFailure:\nTestUnitReporterTest::ExampleTest#woot:\nboo\n\nbin/rails test test/test_unit/reporter_test.rb:\d+\n\n\z}
+    assert_match expect, @output.string
   end
 
   test "outputs errors inline" do
     @reporter.record(errored_test)
     @reporter.report
 
-    assert_match %r{\A\n\nArgumentError: wups\n    No backtrace\n\nbin/rails test .*test/test_unit/reporter_test.rb:6\n\n\z}, @output.string
+    expect = %r{\A\n\nError:\nTestUnitReporterTest::ExampleTest#woot:\nArgumentError: wups\n    No backtrace\n\nbin/rails test .*test/test_unit/reporter_test.rb:6\n\n\z}
+    assert_match expect, @output.string
   end
 
   test "outputs skipped tests inline if verbose" do
@@ -76,7 +78,8 @@ class TestUnitReporterTest < ActiveSupport::TestCase
     verbose.record(skipped_test)
     verbose.report
 
-    assert_match %r{\A\n\nskipchurches, misstemples\n\nbin/rails test .*test/test_unit/reporter_test.rb:\d+\n\n\z}, @output.string
+    expect = %r{\A\n\nSkipped:\nTestUnitReporterTest::ExampleTest#woot:\nskipchurches, misstemples\n\nbin/rails test test/test_unit/reporter_test.rb:\d+\n\n\z}
+    assert_match expect, @output.string
   end
 
   test "does not output rerun snippets after run" do