Clean-up tests and use PHPStan max level for tests

tests/Codec/StringCodecTest.php

@@ -8,24 +8,26 @@ use Ramsey\Uuid\Codec\StringCodec;
 use Ramsey\Uuid\Test\TestCase;
 use Ramsey\Uuid\UuidInterface;
 
-/**
- * Class StringCodecTest
- * @package Ramsey\Uuid\Test\Codec
- * @covers Ramsey\Uuid\Codec\StringCodec
- */
 class StringCodecTest extends TestCase
 {
-
-    /** @var UuidBuilderInterface&MockObject */
+    /**
+     * @var UuidBuilderInterface & MockObject
+     */
     private $builder;
 
-    /** @var UuidInterface&MockObject */
+    /**
+     * @var UuidInterface & MockObject
+     */
     private $uuid;
 
-    /** @var array */
+    /**
+     * @var string[]
+     */
     private $fields;
 
-    /** @var string */
+    /**
+     * @var string
+     */
     private $uuidString = '12345678-1234-abcd-abef-1234abcd4321';
 
     protected function setUp(): void
@@ -47,7 +49,7 @@ class StringCodecTest extends TestCase
         unset($this->builder, $this->uuid, $this->fields);
     }
 
-    public function testEncodeUsesFieldsArray()
+    public function testEncodeUsesFieldsArray(): void
     {
         $this->uuid->expects($this->once())
             ->method('getFieldsHex')
@@ -56,7 +58,7 @@ class StringCodecTest extends TestCase
         $codec->encode($this->uuid);
     }
 
-    public function testEncodeReturnsFormattedString()
+    public function testEncodeReturnsFormattedString(): void
     {
         $this->uuid->method('getFieldsHex')
             ->willReturn($this->fields);
@@ -65,7 +67,7 @@ class StringCodecTest extends TestCase
         $this->assertEquals($this->uuidString, $result);
     }
 
-    public function testEncodeBinaryUsesHexadecimalValue()
+    public function testEncodeBinaryUsesHexadecimalValue(): void
     {
         $this->uuid->expects($this->once())
             ->method('getHex')
@@ -74,7 +76,7 @@ class StringCodecTest extends TestCase
         $codec->encodeBinary($this->uuid);
     }
 
-    public function testEncodeBinaryReturnsBinaryString()
+    public function testEncodeBinaryReturnsBinaryString(): void
     {
         $expected = hex2bin('123456781234abcdabef1234abcd4321');
         $this->uuid->method('getHex')
@@ -84,7 +86,7 @@ class StringCodecTest extends TestCase
         $this->assertEquals($expected, $result);
     }
 
-    public function testDecodeUsesBuilderOnFields()
+    public function testDecodeUsesBuilderOnFields(): void
     {
         $string = 'uuid:12345678-1234-abcd-abef-1234abcd4321';
         $this->builder->expects($this->once())
@@ -94,7 +96,7 @@ class StringCodecTest extends TestCase
         $codec->decode($string);
     }
 
-    public function testDecodeThrowsExceptionOnInvalidUuid()
+    public function testDecodeThrowsExceptionOnInvalidUuid(): void
     {
         $string = 'invalid-uuid';
         $codec = new StringCodec($this->builder);
@@ -103,7 +105,7 @@ class StringCodecTest extends TestCase
         $codec->decode($string);
     }
 
-    public function testDecodeReturnsUuidFromBuilder()
+    public function testDecodeReturnsUuidFromBuilder(): void
     {
         $string = 'uuid:12345678-1234-abcd-abef-1234abcd4321';
         $this->builder->method('build')
@@ -113,7 +115,7 @@ class StringCodecTest extends TestCase
         $this->assertEquals($this->uuid, $result);
     }
 
-    public function testDecodeBytesThrowsExceptionWhenBytesStringNotSixteenCharacters()
+    public function testDecodeBytesThrowsExceptionWhenBytesStringNotSixteenCharacters(): void
     {
         $string = '61';
         $bytes = pack('H*', $string);
@@ -124,7 +126,7 @@ class StringCodecTest extends TestCase
         $codec->decodeBytes($bytes);
     }
 
-    public function testDecodeBytesReturnsUuid()
+    public function testDecodeBytesReturnsUuid(): void
     {
         $string = '123456781234abcdabef1234abcd4321';
         $bytes = pack('H*', $string);