Restore full test coverage

src/AbstractTeller.php

@@ -1,30 +0,0 @@
-<?php declare(strict_types=1);
-/**
- * Banker
- *
- * A Caching library implementing psr/cache (PSR 6) and psr/simple-cache (PSR 16)
- *
- * PHP version 8+
- *
- * @package     Banker
- * @author      Timothy J. Warren <tim@timshomepage.net>
- * @copyright   2016 - 2021  Timothy J. Warren
- * @license     http://www.opensource.org/licenses/mit-license.html  MIT License
- * @version     5.0.0
- * @link        https://git.timshomepage.net/timw4mail/banker
- */
-namespace Aviat\Banker;
-
-use DateInterval;
-use Psr\Log\{LoggerInterface, LoggerAwareInterface};
-
-/**
- * Actual implementations for Simple Cache interface, so that TypeErrors can be caught and replaced with the
- * PSR-specified exceptions
- */
-abstract class AbstractTeller {
-	use _Driver;
-	use LoggerTrait;
-
-
-}

src/Teller.php

@@ -260,19 +260,28 @@ class Teller implements LoggerAwareInterface, SimpleCache\CacheInterface {
 
 	/**
 	 * Obtains multiple cache items by their unique keys.
-	 * @throws Exception\InvalidArgumentException
 	 */
 	protected function _getMultiple(iterable $keys, mixed $default = null): iterable
 	{
-		// Check type of keys
+		$keys = (array)$keys;
-		if ( ! is_iterable($keys))
+		$this->validateKeys($keys);
+		$foundValues = $this->driver->getMultiple($keys);
+		$foundKeys = array_keys($foundValues);
+
+		// If all the values are found, just return them
+		if ($keys === $foundKeys)
 		{
-			throw new Exception\InvalidArgumentException('Keys must be an array or a traversable object');
+			return $foundValues;
 		}
 
-		$this->validateKeys($keys);
+		// Otherwise, return a default value for missing keys
+		$result = $foundValues;
+		foreach (array_diff($keys, $foundKeys) as $key)
+		{
+			$result[$key] = $default;
+		}
 
-		return $this->driver->getMultiple((array)$keys);
+		return $result;
 	}
 
 	/**

tests/TellerTest.php

@@ -123,6 +123,34 @@ class TellerTest extends TestCase {
 		}
 	}
 
+	public function testGetMultipleWithDefaultValues(): void
+	{
+		$setValues = [
+			'foo' => 24,
+			'bar' => '87',
+			'baz' => [1, 2, 3],
+		];
+
+		$expectedValues = [
+			'foo' => 24,
+			'bar' => '87',
+			'baz' => [1, 2, 3],
+			'a' => NULL,
+			'b' => NULL,
+			'c' => NULL,
+			'd' => NULL,
+			'e' => NULL,
+			'f' => NULL,
+		];
+
+		$searchKeys = array_keys($expectedValues);
+
+		$this->assertTrue($this->teller->setMultiple($setValues));
+
+		$received = $this->teller->getMultiple($searchKeys);
+		$this->assertEquals($expectedValues, $received);
+	}
+
 	public function testGetSetMultiple(): void
 	{
 		$this->assertTrue($this->teller->setMultiple($this->testValues));
@@ -185,20 +213,48 @@ class TellerTest extends TestCase {
 	public function testBadKeyType(): void
 	{
 		$this->expectException(InvalidArgumentException::class);
-		// $this->expectExceptionMessage('Cache key must be a string.');
-
 		$this->teller->get(546567);
 	}
 
+	public function testBadKeyTypeSet(): void
+	{
+		$this->expectException(InvalidArgumentException::class);
+		$this->teller->set(546567, 'foo');
+	}
+
+	public function testBadKeyTypeDelete(): void
+	{
+		$this->expectException(InvalidArgumentException::class);
+		$this->teller->delete(546567);
+	}
+
+	public function testBadKeyTypeHas(): void
+	{
+		$this->expectException(InvalidArgumentException::class);
+		$this->teller->has(546567);
+	}
+
 	public function testBadKeysType (): void
 	{
 		$this->expectException(InvalidArgumentException::class);
-		// $this->expectExceptionMessage('Keys must be an array or a traversable object');
-
 		$keys = (object)[];
 		$this->teller->getMultiple($keys);
 	}
 
+	public function testBadKeysTypeSet (): void
+	{
+		$this->expectException(InvalidArgumentException::class);
+		$keys = (object)[];
+		$this->teller->setMultiple($keys);
+	}
+
+	public function testBadKeysTypeDelete (): void
+	{
+		$this->expectException(InvalidArgumentException::class);
+		$keys = (object)[];
+		$this->teller->deleteMultiple($keys);
+	}
+
 	/**
 	 * @dataProvider keyValidationTests
 	 * @param string $key