fix: invoke Tag.run method when registering the tag

src/Edge/index.ts

@@ -15,6 +15,7 @@ import * as Tags from '../Tags'
 import { Loader } from '../Loader'
 import { Compiler } from '../Compiler'
 import { EdgeRenderer } from '../Renderer'
+import { Context } from '../Context'
 
 import {
   TagContract,
@@ -34,7 +35,7 @@ export class Edge implements EdgeContract {
    * List of registered tags. Adding new tags will only impact
    * this list
    */
-  private _tags = Object.assign({}, Tags)
+  private _tags = {}
 
   /**
    * The loader to load templates. A loader can read and return
@@ -49,6 +50,7 @@ export class Edge implements EdgeContract {
   public compiler = new Compiler(this.loader, this._tags, !!this._options.cache)
 
   constructor (private _options: EdgeOptions = {}) {
+    Object.keys(Tags).forEach((name) => this.registerTag(Tags[name]))
   }
 
   /**
@@ -125,6 +127,10 @@ export class Edge implements EdgeContract {
    * ```
    */
   public registerTag (tag: TagContract): this {
+    if (typeof (tag.run) === 'function') {
+      tag.run(Context)
+    }
+
     this._tags[tag.tagName] = tag
     return this
   }

test/edge.spec.ts

@@ -60,6 +60,27 @@ test.group('Edge', (group) => {
     assert.deepEqual(edge.compiler['_tags'].mytag, MyTag)
   })
 
+  test('invoke tag run method when registering the tag', (assert) => {
+    assert.plan(2)
+
+    const edge = new Edge()
+
+    class MyTag {
+      public static tagName = 'mytag'
+      public static block = true
+      public static seekable = true
+      public static compile (): void {
+      }
+
+      public static run (): void {
+        assert.isTrue(true)
+      }
+    }
+
+    edge.registerTag(MyTag)
+    assert.deepEqual(edge.compiler['_tags'].mytag, MyTag)
+  })
+
   test('render a view using the render method', async (assert) => {
     const edge = new Edge()
     await fs.add('foo.edge', 'Hello {{ username }}')