Add cucumber checker for cucumber files

For now, it only detects undefined steps. The nearest `features` dir
above the buffer file is loaded, so step definitions should be found
correctly.

Tested only with Cucumber for Ruby, but it should work for any cucumber
that follows a substantially similar directory structure.

4 files changed, 43 insertions, 0 deletions

diff --git a/test/command_callback/test_cucumber_command_callback.vader b/test/command_callback/test_cucumber_command_callback.vader
new file mode 100644
index 00000000..d09a5712
--- /dev/null
+++ b/test/command_callback/test_cucumber_command_callback.vader
@@ -0,0 +1,25 @@
+Before:
+  runtime ale_linters/ruby/rubocop.vim
+  call ale#test#SetDirectory('/testplugin/test/')
+
+After:
+  Restore
+
+  call ale#linter#Reset()
+  call ale#test#RestoreDirectory()
+
+Execute(Should require the nearest features dir, if one is found):
+  call ale#test#SetFilename('cucumber_fixtures/features/cuke.feature')
+
+  AssertEqual
+  \   'cucumber --dry-run --quiet --strict --format=json '
+  \   . '-r ' . ale#Escape(ale#path#Simplify(g:dir . '/cucumber_fixtures/features/')) . ' %t',
+  \   ale_linters#cucumber#cucumber#GetCommand(bufnr(''))
+
+Execute(Should require nothing if no features dir is found):
+  call ale#test#SetFilename('something/without/a/features/dir')
+
+  AssertEqual
+  \   'cucumber --dry-run --quiet --strict --format=json '
+  \   . ' %t',
+  \   ale_linters#cucumber#cucumber#GetCommand(bufnr(''))
diff --git a/test/cucumber_fixtures/features/cuke.feature b/test/cucumber_fixtures/features/cuke.feature
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/test/cucumber_fixtures/features/cuke.feature
diff --git a/test/cucumber_fixtures/features/step_definitions/base_steps.rb b/test/cucumber_fixtures/features/step_definitions/base_steps.rb
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/test/cucumber_fixtures/features/step_definitions/base_steps.rb
diff --git a/test/handler/test_cucumber_handler.vader b/test/handler/test_cucumber_handler.vader
new file mode 100644
index 00000000..2b69a784
--- /dev/null
+++ b/test/handler/test_cucumber_handler.vader
@@ -0,0 +1,18 @@
+Before:
+  runtime ale_linters/cucumber/cucumber.vim
+
+After:
+  call ale#linter#Reset()
+
+Execute(The cucumber handler parses JSON correctly):
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 13,
+  \     'code': 'E',
+  \     'text': 'Undefined step'
+  \   }
+  \ ],
+  \ ale_linters#cucumber#cucumber#Handle(bufnr(''), [
+  \   '[{"elements": [{"steps": [{"result": {"status": "undefined"},"match": {"location": "features/cuke.feature:13"},"line": 13,"name": "Something undefined","keyword": "Given "},{"result": {"status": "skipped"},"match": {"location": "/var/lib/gems/2.3.0/gems/cucumber-3.1.0/lib/cucumber/step_match.rb:103"},"line": 14,"name": "I visit the profile page for Alice","keyword": "When "}],"type": "scenario","line": 12,"description": "","name": "Another scenario","keyword": "Scenario","id": "a-user-can-view-another-users-profile;another-scenario"}],"line": 1,"description": "","name": "A user can view another users profile","keyword": "Feature","id": "a-user-can-view-another-users-profile","uri": "features/cuke.feature"}]'
+  \ ])