Coverage. Valid block tag syntax

.
@[example](video-123)
.
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.

.
Paragraph before

@[example](video-123)
.
<p>Paragraph before</p>
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.

.
@[example](video-123)

Paragraph after
.
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
<p>Paragraph after</p>
.

.
Paragraph before

@[example](video-123)

Paragraph after
.
<p>Paragraph before</p>
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
<p>Paragraph after</p>
.

.
> Inside block quote:
>
> @[example](video-123)
.
<blockquote>
<p>Inside block quote:</p>
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
</blockquote>
.

.
> > > Inside multiple block quotes:
> > >
> > > @[example](video-123)
.
<blockquote>
<blockquote>
<blockquote>
<p>Inside multiple block quotes:</p>
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
</blockquote>
</blockquote>
</blockquote>
.


Coverage. Missing service name

.
@[](x)
.
<p>@<a href="x"></a></p>
.


Coverage. Missing embed reference (consistent with images)

.
@[example]()
.
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed//42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.


Coverage. Extra spacing inside tag syntax

.
@[  example  ](  video-123  )
.
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.

.
@[example](
video-123 )
.
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.

.
@[example](
video-123
 )
.
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.

.
@[
  example
](
  video-123
)
.
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.


Coverage. Invalid extra spacing inside tag syntax (consistent with images)

.
@[
  example
]
(
  video-123
)
.
<p>@[
example
]
(
video-123
)</p>
.


Coverage. Trailing whitespace after embed tag \/
.
@[example](video-123)                                
.
<div class="block-embed block-embed-service-example"><iframe type="text/html" src="https://example.com/embed/video-123/42" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
.


Coverage. Usage of unknown service

.
@[unknown-service](video-123)
.
<p>@<a href="video-123">unknown-service</a></p>
.


Coverage. Invalid inline tag syntax

.
@[]example(video-123)
.
<p>@[]example(video-123)</p>
.

.
@[(example]
.
<p>@[(example]</p>
.

.
text before @[example](video-123)
.
<p>text before @<a href="video-123">example</a></p>
.

.
@[example](video-123) text after
.
<p>@<a href="video-123">example</a> text after</p>
.

.
Line above embed tag
@[example](video-123)
.
<p>Line above embed tag
@<a href="video-123">example</a></p>
.

.
@[example](video-123)
Line below embed tag
.
<p>@<a href="video-123">example</a>
Line below embed tag</p>
.

.
Line above embed tag
@[example](video-123)
Line below embed tag
.
<p>Line above embed tag
@<a href="video-123">example</a>
Line below embed tag</p>
.

.
Code snippet:

    @[example](video-123)
.
<p>Code snippet:</p>
<pre><code>@[example](video-123)
</code></pre>
.