diff --git a/CHANGELOG.md b/CHANGELOG.md
index b30ef549..dc2621f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@
 * fix(`MainTransformer`): Make sure the target has the same type as the target
   type.
 * feat(`TraversableToArrayAccessTransformer`): Now supports `ArrayCollection` & `ArrayIterator`.
+* test: Assorted tests.
 
 ## 0.5.10
 
diff --git a/psalm.xml b/psalm.xml
index 3950d0f1..c0521895 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -31,5 +31,10 @@
                 <file name="src/Transformer/TraversableToArrayAccessTransformer.php" />
             </errorLevel>
         </MixedAssignment>
+        <PossiblyInvalidArgument>
+            <errorLevel type="suppress">
+                <file name="tests/IntegrationTest/MappingTest.php" />
+            </errorLevel>
+        </PossiblyInvalidArgument>
     </issueHandlers>
 </psalm>
diff --git a/tests/IntegrationTest/MappingTest.php b/tests/IntegrationTest/MappingTest.php
index c09ee667..569f3565 100644
--- a/tests/IntegrationTest/MappingTest.php
+++ b/tests/IntegrationTest/MappingTest.php
@@ -13,26 +13,289 @@
 
 namespace Rekalogika\Mapper\Tests\IntegrationTest;
 
+use Rekalogika\Mapper\Attribute\InheritanceMap;
 use Rekalogika\Mapper\Tests\Common\AbstractIntegrationTest;
+use Rekalogika\Mapper\Tests\Fixtures\EnumAndStringable\ObjectImplementingStringable;
+use Rekalogika\Mapper\Tests\Fixtures\EnumAndStringable\SomeBackedEnum;
+use Rekalogika\Mapper\Tests\Fixtures\EnumAndStringable\SomeEnum;
+use Rekalogika\Mapper\Transformer\Contracts\MixedType;
+use Rekalogika\Mapper\Transformer\CopyTransformer;
+use Rekalogika\Mapper\Transformer\DateTimeTransformer;
+use Rekalogika\Mapper\Transformer\InheritanceMapTransformer;
+use Rekalogika\Mapper\Transformer\ObjectToStringTransformer;
 use Rekalogika\Mapper\Transformer\ScalarToScalarTransformer;
+use Rekalogika\Mapper\Transformer\StringToBackedEnumTransformer;
 use Rekalogika\Mapper\Util\TypeFactory;
+use Symfony\Component\Clock\DatePoint;
+use Symfony\Component\PropertyInfo\Type;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Rekalogika\Mapper\Transformer\TraversableToArrayAccessTransformer;
 
 class MappingTest extends AbstractIntegrationTest
 {
-    public function testScalar(): void
-    {
+    /**
+     * Testing mapping against default mapping table
+     * @dataProvider mappingTestProvider
+     * @param array<int,Type|MixedType> $sources
+     * @param array<int,Type|MixedType> $targets
+     * @param class-string $transformerClass
+     */
+    public function testMapping(
+        array $sources,
+        array $targets,
+        string $transformerClass
+    ): void {
         $searchResult = $this->transformerRegistry->findBySourceAndTargetTypes(
-            sourceTypes: [
-                TypeFactory::int(),
-            ],
-            targetTypes: [
-                TypeFactory::int(),
-            ],
+            sourceTypes: $sources,
+            targetTypes: $targets,
         );
 
+        $this->assertNotEmpty($searchResult);
+
         $this->assertInstanceOf(
-            ScalarToScalarTransformer::class,
+            $transformerClass,
             $searchResult[0]?->getTransformer()
         );
     }
+
+    /**
+     * @return iterable<array-key,array<array-key,mixed>>
+     */
+    public function mappingTestProvider(): iterable
+    {
+        //
+        // scalar
+        //
+
+        yield [
+            [
+                TypeFactory::int()
+            ],
+            [
+                TypeFactory::int()
+            ],
+            ScalarToScalarTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::int()
+            ],
+            [
+                TypeFactory::float()
+            ],
+            ScalarToScalarTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::int()
+            ],
+            [
+                TypeFactory::string()
+            ],
+            ScalarToScalarTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::int()
+            ],
+            [
+                TypeFactory::bool()
+            ],
+            ScalarToScalarTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::int()
+            ],
+            [
+                TypeFactory::resource()
+            ],
+            CopyTransformer::class,
+        ];
+
+        //
+        // datetime
+        //
+
+        yield [
+            [
+                TypeFactory::objectOfClass(\DateTimeInterface::class)
+            ],
+            [
+                TypeFactory::objectOfClass(\DateTimeImmutable::class)
+            ],
+            DateTimeTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(\DateTimeInterface::class)
+            ],
+            [
+                TypeFactory::objectOfClass(\DateTime::class)
+            ],
+            DateTimeTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(\DateTimeInterface::class)
+            ],
+            [
+                TypeFactory::objectOfClass(DatePoint::class)
+            ],
+            DateTimeTransformer::class,
+        ];
+
+        //
+        // stringable
+        //
+
+        yield [
+            [
+                TypeFactory::objectOfClass(ObjectImplementingStringable::class)
+            ],
+            [
+                TypeFactory::string()
+            ],
+            ObjectToStringTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(SomeBackedEnum::class)
+            ],
+            [
+                TypeFactory::string()
+            ],
+            ObjectToStringTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(SomeEnum::class)
+            ],
+            [
+                TypeFactory::string()
+            ],
+            ObjectToStringTransformer::class,
+        ];
+
+        //
+        // string to enum
+        //
+
+        yield [
+            [
+                TypeFactory::string()
+            ],
+            [
+                TypeFactory::objectOfClass(SomeBackedEnum::class)
+            ],
+            StringToBackedEnumTransformer::class,
+        ];
+
+        //
+        // inheritance
+        //
+
+        yield [
+            [
+                TypeFactory::object(),
+            ],
+            [
+                TypeFactory::objectOfClass(InheritanceMap::class)
+            ],
+            InheritanceMapTransformer::class,
+        ];
+
+        //
+        // traversable to array access
+        //
+
+        yield [
+            [
+                TypeFactory::array(),
+            ],
+            [
+                TypeFactory::array(),
+            ],
+            TraversableToArrayAccessTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::array(),
+            ],
+            [
+                TypeFactory::objectOfClass(\ArrayAccess::class)
+            ],
+            TraversableToArrayAccessTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(\ArrayObject::class),
+            ],
+            [
+                TypeFactory::objectOfClass(\ArrayAccess::class)
+            ],
+            TraversableToArrayAccessTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(\ArrayObject::class),
+            ],
+            [
+                TypeFactory::objectOfClass(\ArrayObject::class)
+            ],
+            TraversableToArrayAccessTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(\ArrayObject::class),
+            ],
+            [
+                TypeFactory::objectOfClass(ArrayCollection::class)
+            ],
+            TraversableToArrayAccessTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(ArrayCollection::class),
+            ],
+            [
+                TypeFactory::objectOfClass(Collection::class)
+            ],
+            TraversableToArrayAccessTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(Collection::class),
+            ],
+            [
+                TypeFactory::objectOfClass(\ArrayAccess::class)
+            ],
+            TraversableToArrayAccessTransformer::class,
+        ];
+
+        yield [
+            [
+                TypeFactory::objectOfClass(Collection::class),
+            ],
+            [
+                TypeFactory::objectOfClass(\ArrayObject::class)
+            ],
+            TraversableToArrayAccessTransformer::class,
+        ];
+    }
 }
diff --git a/tests/IntegrationTest/TraversableToArrayAccessMappingTest.php b/tests/IntegrationTest/TraversableToArrayAccessMappingTest.php
index fcba2acb..6c1fcef9 100644
--- a/tests/IntegrationTest/TraversableToArrayAccessMappingTest.php
+++ b/tests/IntegrationTest/TraversableToArrayAccessMappingTest.php
@@ -13,6 +13,7 @@
 
 namespace Rekalogika\Mapper\Tests\IntegrationTest;
 
+use ArrayObject;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Rekalogika\Mapper\Tests\Common\AbstractIntegrationTest;
@@ -244,4 +245,27 @@ public function testSourceStringKeyToTargetIntKey(): void
         $this->assertArrayHasKey(1, $result->property);
         $this->assertArrayHasKey(2, $result->property);
     }
+
+    //
+    // target existing object
+    //
+
+    public function testTraversableToExistingArrayAccessDto(): void
+    {
+        $source = new ObjectWithTraversableProperties();
+        $target = new ObjectWithArrayAccessPropertyDto();
+
+        /** @var \ArrayObject<int,ObjectWithScalarPropertiesDto> */
+        $arrayObject = new \ArrayObject();
+        $target->property = $arrayObject;
+
+        $result = $this->mapper->map($source, $target);
+
+        $this->assertInstanceOf(ObjectWithArrayAccessPropertyDto::class, $result);
+        $this->assertInstanceOf(\ArrayAccess::class, $result->property);
+        $this->assertEquals(1, $result->property[1]?->a);
+        $this->assertEquals("string", $result->property[1]?->b);
+        $this->assertEquals(true, $result->property[1]?->c);
+        $this->assertEquals(1.1, $result->property[1]?->d);
+    }
 }