Alias will grab macros from \Illuminate\Database\Eloquent\Builder too (#1118)

* `Alias` will grab macros from `\Illuminate\Database\Eloquent\Builder` too.

* `@return` will contains `|static` for Eloquent Builder macros which return Eloquent Builder instance.

* `Macro` tests.

* `Alias::detectMethods()` tests.

* Mock classes rename.

src/Alias.php

@@ -17,6 +17,7 @@ use Barryvdh\Reflection\DocBlock\Serializer as DocBlockSerializer;
 use Barryvdh\Reflection\DocBlock\Tag\MethodTag;
 use Closure;
 use Illuminate\Config\Repository as ConfigRepository;
+use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
 use Illuminate\Support\Facades\Facade;
 use ReflectionClass;
 
@@ -368,8 +369,9 @@ class Alias
             }
 
             // Check if the class is macroable
+            // (Eloquent\Builder is also macroable but doesn't use Macroable trait)
             $traits = collect($reflection->getTraitNames());
-            if ($traits->contains('Illuminate\Support\Traits\Macroable')) {
+            if ($traits->contains('Illuminate\Support\Traits\Macroable') || $class === EloquentBuilder::class) {
                 $properties = $reflection->getStaticProperties();
                 $macros = isset($properties['macros']) ? $properties['macros'] : [];
                 foreach ($macros as $macro_name => $macro_func) {