Combined both negative tests into one

Co-authored-by: neznaika0 <ozornick.ks@gmail.com>

Author: patel-vansh

tests/system/Database/Live/IncrementTest.php

@@ -91,24 +91,13 @@ public function testIncrementManyWithValue(): void
 
     public function testIncrementManyWithNegativeValue(): void
     {
-        $this->hasInDatabase('job', ['name' => 'job1', 'description' => '6', 'created_at' => 1]);
+        $this->hasInDatabase('job', ['name' => 'job1', 'description' => '-6', 'created_at' => 1]);
 
         $this->db->table('job')
             ->where('name', 'job1')
-            ->incrementMany(['description' => 2, 'created_at' => -1]);
-
-        $this->seeInDatabase('job', ['name' => 'job1', 'description' => '8', 'created_at' => 0]);
-    }
-
-    public function testIncrementManyWithInitialAndIncrementNegativeValues(): void
-    {
-        $this->hasInDatabase('job', ['name' => 'job2', 'description' => '10', 'created_at' => -1]);
-
-        $this->db->table('job')
-            ->where('name', 'job2')
-            ->incrementMany(['description' => 2, 'created_at' => -3]);
+            ->incrementMany(['description' => -2, 'created_at' => -1]);
 
-        $this->seeInDatabase('job', ['name' => 'job2', 'description' => '12', 'created_at' => -4]);
+        $this->seeInDatabase('job', ['name' => 'job1', 'description' => '-8', 'created_at' => 0]);
     }
 
     public function testIncrementManyWithEmptyColumns(): void
@@ -209,24 +198,13 @@ public function testDecrementManyWithValue(): void
 
     public function testDecrementManyWithNegativeValue(): void
     {
-        $this->hasInDatabase('job', ['name' => 'job1', 'description' => '6', 'created_at' => 1]);
+        $this->hasInDatabase('job', ['name' => 'job1', 'description' => '-6', 'created_at' => 1]);
 
         $this->db->table('job')
             ->where('name', 'job1')
-            ->decrementMany(['description' => 2, 'created_at' => -1]);
-
-        $this->seeInDatabase('job', ['name' => 'job1', 'description' => '4', 'created_at' => 2]);
-    }
-
-    public function testDecrementManyWithInitialAndIncrementNegativeValues(): void
-    {
-        $this->hasInDatabase('job', ['name' => 'job2', 'description' => '10', 'created_at' => -1]);
-
-        $this->db->table('job')
-            ->where('name', 'job2')
-            ->decrementMany(['description' => 2, 'created_at' => -3]);
+            ->decrementMany(['description' => -2, 'created_at' => -1]);
 
-        $this->seeInDatabase('job', ['name' => 'job2', 'description' => '8', 'created_at' => 2]);
+        $this->seeInDatabase('job', ['name' => 'job1', 'description' => '-4', 'created_at' => 2]);
     }
 
     public function testDecrementManyWithEmptyColumns(): void