add bdi core component & docs & tests

Author: pascalwengerter

app/concepts/matestack/ui/core/bdi/bdi.haml

@@ -0,0 +1,5 @@
+%bdi{@tag_attributes}
+  - if options[:text].blank? && block_given?
+    = yield
+  - else
+    = options[:text]

app/concepts/matestack/ui/core/bdi/bdi.rb

@@ -0,0 +1,4 @@
+module Matestack::Ui::Core::Bdi
+  class Bdi < Matestack::Ui::Core::Component::Static
+  end
+end

docs/components/README.md

@@ -12,6 +12,7 @@ You can build your [own components](/docs/extend/README.md) as well, both static
 - [article](/docs/components/article.md)
 - [aside](/docs/components/aside.md)
 - [b](/docs/components/b.md)
+- [bdi](/docs/components/bdi.md)
 - [blockquote](/docs/components/blockquote.md)
 - [br](/docs/components/br.md)
 - [button](/docs/components/button.md)

docs/components/bdi.md

@@ -0,0 +1,44 @@
+# matestack core component: Bdi
+
+Show [specs](/spec/usage/components/bdi_spec.rb)
+
+The HTML `<bdi>` tag implemented in ruby.
+
+## Parameters
+
+This component can take 2 optional configuration params and either yield content or display what gets passed to the `text` configuration param.
+
+#### # id (optional)
+Expects a string with all ids the `<bdi>` should have.
+
+#### # class (optional)
+Expects a string with all classes the `<bdi>` should have.
+
+## Example 1: Yield a given block
+
+```ruby
+bdi id: 'foo', class: 'bar' do
+  plain 'Bdi example 1' # optional content
+end
+```
+
+returns
+
+```html
+<bdi id="foo" class="bar">
+  Bdi example 1
+</bdi>
+```
+
+## Example 2: Render `options[:text]` param
+
+```ruby
+bdi id: 'foo', class: 'bar', text: 'Bdi example 2'
+```
+
+returns
+
+```html
+<bdi id="foo" class="bar">
+  Bdi example 2
+</bdi>

spec/usage/components/bdi_spec.rb

@@ -0,0 +1,31 @@
+require_relative '../../support/utils'
+include Utils
+
+describe 'Bdi component', type: :feature, js: true do
+  it 'Renders a simple and enhanced bdi tag on a page' do
+    class ExamplePage < Matestack::Ui::Page
+      def response
+        components {
+          # Simple bdi
+          bdi text: 'Simple bdi tag'
+
+          # Enhanced bdi
+          bdi id: 'my-id', class: 'my-class' do
+            plain 'Enhanced bdi tag'
+          end
+        }
+      end
+    end
+
+    visit '/example'
+
+    static_output = page.html
+
+    expected_static_output = <<~HTML
+      <bdi>Simple bdi tag</bdi>
+      <bdi id="my-id" class="my-class">Enhanced bdi tag</bdi>
+    HTML
+
+    expect(stripped(static_output)).to include(stripped(expected_static_output))
+  end
+end