MC-33069: Stabilize Unit tests

Author: viktorpetryk

app/code/Magento/SalesRule/Test/Unit/Model/ResourceModel/Report/CollectionTest.php

@@ -177,10 +177,7 @@ public function testApplyRulesFilterWithRulesList()
 
         $this->selectMock->expects($this->at(3))
             ->method('where')
-            ->with(implode([
-                'test_1',
-                'test_2',
-            ], ' OR '));
+            ->with(implode(' OR ', ['test_1', 'test_2']));
 
         $ruleMock = $this->getRuleMock();
         $ruleMock->expects($this->once())

app/code/Magento/SalesRule/Test/Unit/Model/Rule/Action/Discount/CartFixedTest.php

@@ -118,6 +118,12 @@ protected function setUp(): void
      */
     public function testCalculate()
     {
+        $ruleItemTotals = [
+            'items_price' => 100,
+            'base_items_price' => 100,
+            'items_count' => 1,
+        ];
+
         $this->rule->setData(['id' => 1, 'discount_amount' => 10.0]);
 
         $this->quote->expects($this->any())->method('getCartFixedRules')->willReturn([]);
@@ -126,6 +132,11 @@ public function testCalculate()
         $this->priceCurrency->expects($this->atLeastOnce())->method('round')->willReturnArgument(0);
         $this->quote->expects($this->any())->method('getStore')->willReturn($store);
 
+        $this->validator->expects($this->once())
+            ->method('getRuleItemTotalsInfo')
+            ->with($this->rule->getId())
+            ->willReturn($ruleItemTotals);
+
         /** validators data */
         $this->validator->expects(
             $this->once()