1 files changed, 16 insertions, 1 deletions
diff --git a/tests/lib/Security/SecureRandomTest.php b/tests/lib/Security/SecureRandomTest.php
index 7257d52e8f5..c7ee76a96bb 100644
--- a/tests/lib/Security/SecureRandomTest.php
+++ b/tests/lib/Security/SecureRandomTest.php
@@ -16,7 +16,6 @@ use OC\Security\SecureRandom;
 class SecureRandomTest extends \Test\TestCase {
 	public function stringGenerationProvider() {
 		return [
-			[0, 0],
 			[1, 1],
 			[128, 128],
 			[256, 256],
@@ -77,4 +76,20 @@ class SecureRandomTest extends \Test\TestCase {
 		$matchesRegex = preg_match('/^'.$chars.'+$/', $randomString);
 		$this->assertSame(1, $matchesRegex);
 	}
+
+	public static function invalidLengths() {
+		return [
+			[0],
+			[-1],
+		];
+	}
+
+	/**
+	 * @dataProvider invalidLengths
+	 */
+	public function testInvalidLengths($length) {
+		$this->expectException(\LengthException::class);
+		$generator = $this->rng;
+		$generator->generate($length);
+	}
 }