Add some basic tests

Signed-off-by: Christian Wolf <github@christianwolf.email>

tests/Unit/Helper/Filter/DB/RecipeNameLengthFilterTest.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace OCA\Cookbook\tests\Unit\Helper\Filter\DB;
+
+use OCA\Cookbook\Helper\Filter\DB\RecipeNameLengthFilter;
+use OCP\Files\File;
+use PHPUnit\Framework\MockObject\Stub;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @covers OCA\Cookbook\Helper\Filter\DB\RecipeDatesFilter
+ */
+class RecipeNameLengthFilterTest extends TestCase {
+	/** @var RecipeNameLengthFilter */
+	private $dut;
+
+	protected function setUp(): void {
+		$this->dut = new RecipeNameLengthFilter();
+	}
+
+	public function dp() {
+		yield ['abc', 'abc', false];
+		yield ['äöü', 'äöü', false];
+
+		$tenChars = "0123456789";
+		$twentyChars = "$tenChars$tenChars";
+		$fiftyChars = $twentyChars . $twentyChars . $tenChars;
+		$hundredTwenty = $fiftyChars . $fiftyChars . $twentyChars;
+
+		yield [$hundredTwenty, $hundredTwenty, false];
+		yield [$hundredTwenty . '1234567', $hundredTwenty . '1234567', false];
+		yield [$hundredTwenty . '12345678', $hundredTwenty . '12345678', false];
+		yield [$hundredTwenty . '123456789', $hundredTwenty . '12345…', true];
+		yield [$hundredTwenty . $hundredTwenty, $hundredTwenty . '01234…', true];
+
+		yield [$hundredTwenty . '123456ä', $hundredTwenty . '123456ä', false];
+		yield [$hundredTwenty . '123456ä1', $hundredTwenty . '12345…', true];
+		yield [$hundredTwenty . '12345äö', $hundredTwenty . '12345…', true];
+		yield [$hundredTwenty . '1234äö', $hundredTwenty . '1234äö', false];
+	}
+
+	/** @dataProvider dp */
+	public function testFilter($inputName, $expectedName, $changed) {
+		$input = $this->getStub($inputName);
+		$expected = $this->getStub($expectedName);
+
+		$file = $this->createStub(File::class);
+
+		$ret = $this->dut->apply($input, $file);
+
+		$this->assertSame($expected, $input);
+		$this->assertEquals($changed, $ret);
+	}
+
+	private function getStub($name) {
+		return [
+			'id' => 123,
+			'name' => $name,
+		];
+	}
+}