zip extra fields tests

tests/Extra/Fields/JarMarkerExtraFieldTest.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace PhpZip\Tests\Extra\Fields;
+
+use PHPUnit\Framework\TestCase;
+use PhpZip\Exception\ZipException;
+use PhpZip\Model\Extra\Fields\JarMarkerExtraField;
+
+/**
+ * Class JarMarkerExtraFieldTest.
+ *
+ * @internal
+ *
+ * @small
+ */
+final class JarMarkerExtraFieldTest extends TestCase
+{
+    /**
+     * @throws ZipException
+     */
+    public function testExtraField()
+    {
+        $jarField = new JarMarkerExtraField();
+        self::assertSame('', $jarField->packLocalFileData());
+        self::assertSame('', $jarField->packCentralDirData());
+        self::assertEquals(JarMarkerExtraField::unpackLocalFileData(''), $jarField);
+        self::assertEquals(JarMarkerExtraField::unpackCentralDirData(''), $jarField);
+    }
+
+    /**
+     * @throws ZipException
+     */
+    public function testInvalidUnpackLocalData()
+    {
+        $this->setExpectedException(
+            ZipException::class,
+            "JarMarker doesn't expect any data"
+        );
+
+        JarMarkerExtraField::unpackLocalFileData("\x02\x00\00");
+    }
+
+    /**
+     * @throws ZipException
+     */
+    public function testInvalidUnpackCdData()
+    {
+        $this->setExpectedException(
+            ZipException::class,
+            "JarMarker doesn't expect any data"
+        );
+
+        JarMarkerExtraField::unpackCentralDirData("\x02\x00\00");
+    }
+}