Allow aliasing on {{ seo_pro:meta_data }} tag (#362)

* Allow aliasing seo_pro:meta_data

* Fix blade regression to pass failing blade tests.

* Add basic test coverage for `meta_data` tag, with and without new `as` alias.

---------

Co-authored-by: Jesse Leite <jesseleite@gmail.com>

Author: amadeann

src/Directives/SeoProDirective.php

@@ -16,7 +16,10 @@ public function renderTag($tag, $context)
             );
         }
 
-        return $this->setContext($context)->$tag();
+        return $this
+            ->setContext($context)
+            ->setParameters([])
+            ->$tag();
     }
 
     protected function isMissingContext($context)

src/Tags/SeoProTags.php

@@ -49,7 +49,7 @@ public function metaData()
         $metaData['is_twitter_glide_enabled'] = $this->isGlidePresetEnabled('seo_pro_twitter');
         $metaData['is_og_glide_enabled'] = $this->isGlidePresetEnabled('seo_pro_og');
 
-        return $metaData;
+        return $this->aliasedResult($metaData);
     }
 
     /**

tests/Fixtures/site/content/collections/pages/about.md

@@ -1,8 +1,9 @@
 ---
 title: About
+subtitle: The Best About Page
 updated_by: 96300192-873c-4615-b992-157508a8d7c5
 updated_at: 1579284102
 template: page
 id: 62136fa2-9e5c-4c38-a894-a2753f02f5ff
 ---
-I'm just a kid living in the 90's, writing articles in his secret public journal wonder if someday, somewhere in the future, they will be read by someone.
+I'm just a kid living in the 90's, writing articles in his secret public journal wonder if someday, somewhere in the future, they will be read by someone.

tests/MetaTagTest.php

@@ -773,6 +773,54 @@ public function it_hydrates_cascade_on_custom_routes_using_blade_directive($view
         $this->assertStringContainsStringIgnoringLineEndings('<title>Custom Route Entry Title | Site Name</title>', $content);
     }
 
+    /** @test */
+    public function it_can_loop_over_meta_data()
+    {
+        $this->withoutExceptionHandling();
+        $this->prepareViews('antlers');
+        $this->files->put(resource_path('views-seo-pro/layout.antlers.html'), <<<'EOT'
+{{ seo_pro:meta_data }}
+    <h1>{{ title }}</h1>
+    <h2>{{ description }}</h2>
+    <h3>{{ canonical_url }}</h3>
+{{ /seo_pro:meta_data }}
+EOT);
+
+        $content = $this->get('/the-view')->content();
+        $this->assertStringContainsStringIgnoringLineEndings('<h1>The View</h1>', $content);
+        $this->assertStringContainsStringIgnoringLineEndings('<h2>A wonderful view!</h2>', $content);
+        $this->assertStringContainsStringIgnoringLineEndings('<h3>http://cool-runnings.com/the-view</h3>', $content);
+    }
+
+    /** @test */
+    public function it_can_loop_over_aliased_meta_data()
+    {
+        $this->withoutExceptionHandling();
+
+        $this
+            ->prepareViews('antlers')
+            ->setSeoOnCollection(Collection::find('pages'), [
+                'title' => '@seo:subtitle',
+            ]);
+
+        $this->files->put(resource_path('views-seo-pro/layout.antlers.html'), <<<'EOT'
+<h1 class="title_outside">{{ title }}</h1>
+{{ seo_pro:meta_data as="foo" }}
+    <h1 class="title_inside">{{ title }}</h1>
+    <h1>{{ foo:title }}</h1>
+    <h3>{{ foo:canonical_url }}</h3>
+    <h3 class="canonical_url_without_scoping">{{ canonical_url }}</h3>
+{{ /seo_pro:meta_data }}
+EOT);
+
+        $content = $this->get('/about')->content();
+        $this->assertStringContainsStringIgnoringLineEndings('<h1 class="title_outside">About</h1>', $content);
+        $this->assertStringContainsStringIgnoringLineEndings('<h1 class="title_inside">About</h1>', $content);
+        $this->assertStringContainsStringIgnoringLineEndings('<h1>The Best About Page</h1>', $content);
+        $this->assertStringContainsStringIgnoringLineEndings('<h3>http://cool-runnings.com/about</h3>', $content);
+        $this->assertStringContainsStringIgnoringLineEndings('<h3 class="canonical_url_without_scoping"></h3>', $content);
+    }
+
     protected function setCustomGlidePresetDimensions($app)
     {
         $app->config->set('statamic.seo-pro.assets', [