diff --git a/tests/Unit/Context/ArgsContextTest.php b/tests/Unit/Context/ArgsContextTest.php
new file mode 100644
index 00000000..bc8e02d2
--- /dev/null
+++ b/tests/Unit/Context/ArgsContextTest.php
@@ -0,0 +1,22 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\Orisai\ObjectMapper\Unit\Context;
+
+use Orisai\ObjectMapper\Context\ArgsContext;
+use Orisai\ObjectMapper\Tester\ObjectMapperTester;
+use PHPUnit\Framework\TestCase;
+
+final class ArgsContextTest extends TestCase
+{
+
+	public function test(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+
+		$context = new ArgsContext($deps->metaLoader, $deps->metaResolver);
+
+		self::assertSame($deps->metaLoader, $context->getMetaLoader());
+		self::assertSame($deps->metaResolver, $context->getMetaResolver());
+	}
+
+}
diff --git a/tests/Unit/Context/ArgsFieldContextTest.php b/tests/Unit/Context/ArgsFieldContextTest.php
new file mode 100644
index 00000000..b9c8d059
--- /dev/null
+++ b/tests/Unit/Context/ArgsFieldContextTest.php
@@ -0,0 +1,38 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\Orisai\ObjectMapper\Unit\Context;
+
+use Orisai\ObjectMapper\Context\ArgsFieldContext;
+use Orisai\ObjectMapper\Meta\Shared\DefaultValueMeta;
+use Orisai\ObjectMapper\Tester\ObjectMapperTester;
+use PHPUnit\Framework\TestCase;
+
+final class ArgsFieldContextTest extends TestCase
+{
+
+	public function test(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$default = DefaultValueMeta::fromNothing();
+
+		$context = new ArgsFieldContext($deps->metaLoader, $deps->metaResolver, $default);
+
+		self::assertSame($deps->metaLoader, $context->getMetaLoader());
+		self::assertSame($deps->metaResolver, $context->getMetaResolver());
+		self::assertFalse($context->hasDefaultValue());
+	}
+
+	public function testHasDefault(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$default = DefaultValueMeta::fromValue('foo');
+
+		$context = new ArgsFieldContext($deps->metaLoader, $deps->metaResolver, $default);
+
+		self::assertSame($deps->metaLoader, $context->getMetaLoader());
+		self::assertSame($deps->metaResolver, $context->getMetaResolver());
+		self::assertTrue($context->hasDefaultValue());
+		self::assertSame('foo', $context->getDefaultValue());
+	}
+
+}
diff --git a/tests/Unit/Context/FieldContextTest.php b/tests/Unit/Context/FieldContextTest.php
new file mode 100644
index 00000000..a529c065
--- /dev/null
+++ b/tests/Unit/Context/FieldContextTest.php
@@ -0,0 +1,51 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\Orisai\ObjectMapper\Unit\Context;
+
+use Orisai\ObjectMapper\Context\FieldContext;
+use Orisai\ObjectMapper\Meta\Shared\DefaultValueMeta;
+use Orisai\ObjectMapper\Processing\Options;
+use Orisai\ObjectMapper\Tester\ObjectMapperTester;
+use Orisai\ObjectMapper\Types\SimpleValueType;
+use Orisai\ObjectMapper\Types\Type;
+use PHPUnit\Framework\TestCase;
+use ReflectionProperty;
+use Tests\Orisai\ObjectMapper\Doubles\DefaultsVO;
+
+final class FieldContextTest extends TestCase
+{
+
+	public function test(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$options = new Options();
+		$typeCreator = static fn (): Type => new SimpleValueType('string');
+		$default = DefaultValueMeta::fromNothing();
+		$fieldName = 'field';
+		$property = new ReflectionProperty(DefaultsVO::class, 'string');
+
+		$context = new FieldContext(
+			$deps->metaLoader,
+			$deps->ruleManager,
+			$deps->processor,
+			$options,
+			$typeCreator,
+			$default,
+			true,
+			$fieldName,
+			$property,
+		);
+
+		self::assertSame($deps->processor, $context->getProcessor());
+		self::assertTrue($context->shouldInitializeObjects());
+
+		self::assertFalse($context->hasDefaultValue());
+		self::assertSame($property->getName(), $context->getPropertyName());
+		self::assertSame($fieldName, $context->getFieldName());
+
+		self::assertEquals($typeCreator(), $context->getType());
+		self::assertNotSame($typeCreator(), $context->getType());
+		self::assertSame($context->getType(), $context->getType());
+	}
+
+}
diff --git a/tests/Unit/Context/MappedObjectContextTest.php b/tests/Unit/Context/MappedObjectContextTest.php
new file mode 100644
index 00000000..fdd7d1ad
--- /dev/null
+++ b/tests/Unit/Context/MappedObjectContextTest.php
@@ -0,0 +1,39 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\Orisai\ObjectMapper\Unit\Context;
+
+use Orisai\ObjectMapper\Context\MappedObjectContext;
+use Orisai\ObjectMapper\Processing\Options;
+use Orisai\ObjectMapper\Tester\ObjectMapperTester;
+use Orisai\ObjectMapper\Types\MappedObjectType;
+use Orisai\ObjectMapper\Types\Type;
+use PHPUnit\Framework\TestCase;
+use Tests\Orisai\ObjectMapper\Doubles\DefaultsVO;
+
+final class MappedObjectContextTest extends TestCase
+{
+
+	public function test(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$options = new Options();
+		$typeCreator = static fn (): Type => new MappedObjectType(DefaultsVO::class);
+
+		$context = new MappedObjectContext(
+			$deps->metaLoader,
+			$deps->ruleManager,
+			$deps->processor,
+			$options,
+			$typeCreator,
+			true,
+		);
+
+		self::assertSame($deps->processor, $context->getProcessor());
+		self::assertTrue($context->shouldInitializeObjects());
+
+		self::assertEquals($typeCreator(), $context->getType());
+		self::assertNotSame($typeCreator(), $context->getType());
+		self::assertSame($context->getType(), $context->getType());
+	}
+
+}
diff --git a/tests/Unit/Context/ProcessorCallContextTest.php b/tests/Unit/Context/ProcessorCallContextTest.php
new file mode 100644
index 00000000..6f928eb7
--- /dev/null
+++ b/tests/Unit/Context/ProcessorCallContextTest.php
@@ -0,0 +1,33 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\Orisai\ObjectMapper\Unit\Context;
+
+use Orisai\ObjectMapper\Context\ProcessorCallContext;
+use Orisai\ObjectMapper\Processing\ObjectCreator;
+use Orisai\ObjectMapper\Processing\ObjectHolder;
+use Orisai\ObjectMapper\Tester\ObjectMapperTester;
+use PHPUnit\Framework\TestCase;
+use Tests\Orisai\ObjectMapper\Doubles\DefaultsVO;
+
+final class ProcessorCallContextTest extends TestCase
+{
+
+	public function test(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$meta = $deps->metaLoader->load(DefaultsVO::class);
+		$holder = new ObjectHolder(
+			new ObjectCreator($deps->dependencyInjectorManager),
+			DefaultsVO::class,
+			$meta->getClass(),
+			null,
+		);
+
+		$context = new ProcessorCallContext(DefaultsVO::class, $holder, $meta);
+
+		self::assertSame(DefaultsVO::class, $context->getClass());
+		self::assertSame($holder, $context->getObjectHolder());
+		self::assertSame($meta, $context->getMeta());
+	}
+
+}
diff --git a/tests/Unit/Context/TypeContextTest.php b/tests/Unit/Context/TypeContextTest.php
new file mode 100644
index 00000000..c409290f
--- /dev/null
+++ b/tests/Unit/Context/TypeContextTest.php
@@ -0,0 +1,91 @@
+<?php declare(strict_types = 1);
+
+namespace Tests\Orisai\ObjectMapper\Unit\Context;
+
+use Orisai\ObjectMapper\Context\TypeContext;
+use Orisai\ObjectMapper\Processing\Options;
+use Orisai\ObjectMapper\Rules\StringRule;
+use Orisai\ObjectMapper\Tester\ObjectMapperTester;
+use PHPUnit\Framework\TestCase;
+use Tests\Orisai\ObjectMapper\Doubles\DefaultsVO;
+use Tests\Orisai\ObjectMapper\Doubles\NoDefaultsVO;
+use Throwable;
+
+final class TypeContextTest extends TestCase
+{
+
+	public function testDependencies(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$options = new Options();
+
+		$context = new TypeContext($deps->metaLoader, $deps->ruleManager, $options);
+
+		try {
+			$context->getMeta(DefaultsVO::class);
+		} catch (Throwable $e) {
+			// Handled bellow
+		}
+
+		self::assertFalse(isset($e));
+
+		try {
+			$context->getRule(StringRule::class);
+		} catch (Throwable $e) {
+			// Handled bellow
+		}
+
+		self::assertFalse(isset($e));
+	}
+
+	public function testClone(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$options = new Options();
+
+		$initContext = new TypeContext($deps->metaLoader, $deps->ruleManager, $options);
+		$context = $initContext->createClone();
+
+		self::assertEquals($initContext, $context);
+		self::assertNotSame($initContext, $context);
+	}
+
+	public function testOptions(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$options = new Options();
+
+		$initContext = new TypeContext($deps->metaLoader, $deps->ruleManager, $options);
+
+		self::assertSame($options, $initContext->getOptions());
+
+		$context = $initContext->createClone();
+		self::assertSame($options, $initContext->getOptions());
+		self::assertEquals($options, $context->getOptions());
+		self::assertNotSame($options, $context->getOptions());
+	}
+
+	public function testProcessedClasses(): void
+	{
+		$deps = (new ObjectMapperTester())->buildDependencies();
+		$options = new Options();
+
+		$initContext = new TypeContext($deps->metaLoader, $deps->ruleManager, $options);
+
+		self::assertSame([], $initContext->getProcessedClasses());
+
+		$context = $initContext
+			->withProcessedClass(DefaultsVO::class)
+			->withProcessedClass(NoDefaultsVO::class);
+
+		self::assertSame([], $initContext->getProcessedClasses());
+		self::assertSame(
+			[
+				DefaultsVO::class,
+				NoDefaultsVO::class,
+			],
+			$context->getProcessedClasses(),
+		);
+	}
+
+}