Added Dumpable tests

tests/Unit/DumpableTest.php

@@ -0,0 +1,83 @@
+<?php
+
+declare(strict_types=1);
+
+use Rudashi\FluentBuilder;
+use Symfony\Component\VarDumper\Cloner\VarCloner;
+use Symfony\Component\VarDumper\Dumper\CliDumper;
+use Symfony\Component\VarDumper\Test\VarDumperTestTrait;
+use Symfony\Component\VarDumper\VarDumper;
+
+uses(VarDumperTestTrait::class);
+
+const EXPECTED_DUMP = [
+    FluentBuilder::class,
+    '#context: ""\n',
+    '#patterns: []\n',
+    '#pattern: []\n',
+    '#modifiers: []\n',
+    '#anchors: Rudashi\Anchors',
+    '-prefix: []\n',
+    '-suffix: []\n',
+    '-builder: Rudashi\FluentBuilder',
+    '-delimiter: "/"\n',
+    '-isSub: false\n',
+];
+
+beforeEach(function () {
+    $cloner = new VarCloner();
+    $dumper = new CliDumper('php://output');
+    VarDumper::setHandler(function ($var) use ($cloner, $dumper) {
+        $dumper->dump($cloner->cloneVar($var));
+    });
+
+    $this->builder = new FluentBuilder();
+});
+
+it('can use `dump`', function () {
+    ob_start();
+
+    $result = $this->builder->dump();
+    $dump = ob_get_clean();
+
+    expect($result)
+        ->toBeInstanceOf(FluentBuilder::class)
+        ->and($this->getDump($dump))
+        ->toContain(...EXPECTED_DUMP);
+});
+
+it('can use `dump` with argument', function () {
+    $var1 = 'Lorem ipsum';
+
+    ob_start();
+    $this->builder->dump($var1);
+    $dump = ob_get_clean();
+
+    expect($this->getDump($dump))
+        ->toContain(
+            '}\n
+"Lorem ipsum"\n
+"""',
+            ...EXPECTED_DUMP,
+        );
+});
+
+it('can use `dump` with arguments', function () {
+    $var1 = 'Lorem';
+    $var2 = 'ipsum';
+    $var3 = 'dolor';
+
+    ob_start();
+    $this->builder->dump($var1, $var2, $var3);
+    $dump = ob_get_clean();
+
+    expect($this->getDump($dump))
+        ->toContain(
+            '}\n
+"Lorem"\n
+"ipsum"\n
+"dolor"\n
+"""',
+            ...EXPECTED_DUMP,
+        );
+});