[event-protocol] Add an example for scenario outlines.

This illustrates the problem Bjorn is talking about in
#172 (comment)
where we need to use two lines to represent the location of a scenario
outline step but we're currently only using one.

event-protocol/ruby/examples/readme.md

@@ -0,0 +1,11 @@
+Each of these examples isolates a simple case of using Cucumber with the events plugin, showing
+the expected events output in the `expected-events.ndjson`.
+
+These are used in the acceptance tests in `spec/cucumber/formatter/event_stream/event_stream_spec.rb` and the real output from running cucumber is comapred with this expected output.
+To run a test manually, `cd` into the directory of the example, then run:
+
+```
+bundle exec cucumber -r . --format Cucumber::Formatter::EventStream::Plugin
+```
+
+Note that a certain amount of normalisation (for timestamps and directory paths) is neccesary before comparing the output for testing.

event-protocol/ruby/examples/scenario-outline/expected-events.ndjson

@@ -0,0 +1,9 @@
+{"type":"source","uri":"features/passing_outline.feature","data":"Feature:\n  Scenario Outline:\n    Given this step is <status>\n\n    Examples:\n      | status  |\n      | passing |\n","media":{"encoding":"utf-8","type":"text/vnd.cucumber.gherkin+plain"}}
+{"type":"test-run-started","workingDirectory":"{{Dir.pwd}}/examples/scenario-outline","timestamp":1494880725}
+{"type":"test-case-prepared","sourceLocation":{"uri":"features/passing_outline.feature","line":7},"steps":[{"actionLocation":{"uri":"{{Cucumber::LIBDIR}}/cucumber/filters/prepare_world.rb","line":28}},{"actionLocation":{"uri":"features/step_definitions/steps.rb","line":1},"sourceLocation":{"uri":"features/passing_outline.feature","line":7}}]}
+{"type":"test-case-started","sourceLocation":{"uri":"features/passing_outline.feature","line":7}}
+{"type":"test-step-started","testCase":{"sourceLocation":{"uri":"features/passing_outline.feature","line":7}},"index":0}
+{"type":"test-step-finished","testCase":{"sourceLocation":{"uri":"features/passing_outline.feature","line":7}},"index":0,"result":{"status":"passed","duration":5000}}
+{"type":"test-step-started","testCase":{"sourceLocation":{"uri":"features/passing_outline.feature","line":7}},"index":1}
+{"type":"test-step-finished","testCase":{"sourceLocation":{"uri":"features/passing_outline.feature","line":7}},"index":1,"result":{"status":"passed","duration":200000}}
+{"type":"test-case-finished","sourceLocation":{"uri":"features/passing_outline.feature","line":7},"result":{"status":"passed","duration":38645000}}

event-protocol/ruby/examples/scenario-outline/features/passing_outline.feature

@@ -0,0 +1,7 @@
+Feature:
+  Scenario Outline:
+    Given this step is <status>
+
+    Examples:
+      | status  |
+      | passing |

event-protocol/ruby/examples/scenario-outline/features/step_definitions/steps.rb

@@ -0,0 +1,3 @@
+Given(/pass/) do
+  # noop
+end

event-protocol/ruby/spec/cucumber/formatter/event_stream_spec.rb

@@ -58,7 +58,9 @@
   describe "examples" do
 
     path = File.dirname(__FILE__) + "/../../../examples/*"
-    examples = Dir[path].map { |path| File.expand_path(path) }
+    examples = Dir[path].
+      map { |path| File.expand_path(path) }.
+      select { |path| File.directory?(path) }
 
     examples.each do |example_dir|