Add tests for sub relation

tests/Database/Migrations/2020_12_02_000000_create_comments_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateCommentsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('comments', function (Blueprint $table) {
+            $table->increments('id');
+            $table->foreignId('post_id')->constrained()->cascadeOnDelete();
+            $table->string('body');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('comments');
+    }
+}

tests/Database/Models/Comment.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Datalogix\BuilderMacros\Tests\Database\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Comment extends Model
+{
+    protected $guarded = [];
+
+    public function post()
+    {
+        return $this->belongsTo(Post::class);
+    }
+}

tests/Database/Models/Post.php

@@ -12,4 +12,9 @@ public function user()
     {
         return $this->belongsTo(User::class);
     }
+
+    public function comments()
+    {
+        return $this->hasMany(Comment::class);
+    }
 }

tests/Macros/WhereLikeTest.php

@@ -43,6 +43,14 @@ public function testQueryWithRelation()
         $this->assertEquals($expected, $actual);
     }
 
+    public function testQueryWithSubRelation()
+    {
+        $expected = 'select * from "users" where ("users"."name" LIKE ? or "users"."email" LIKE ? or exists (select * from "posts" where "users"."id" = "posts"."user_id" and exists (select * from "comments" where "posts"."id" = "comments"."post_id" and "body" LIKE ?)))';
+        $actual = User::whereLike(['name', 'email', 'posts.comments.body'], 'foo')->toSql();
+
+        $this->assertEquals($expected, $actual);
+    }
+
     public function testQueryWithColumnKey()
     {
         $expected = 'select * from "users" where ("users"."name_id" = ?)';