Add SimpleCacheV3Test for PSR-16 v3 strict type hints (#121)

composer.json

@@ -26,6 +26,7 @@
         "php": ">=5.5.9"
     },
     "require-dev": {
+        "psr/simple-cache": "^1.0 || ^2.0 || ^3.0",
         "cache/cache": "^1.0",
         "symfony/cache": "^3.4.31|^4.3.4|^5.0",
         "symfony/phpunit-bridge": "^5.1,<5.3",

src/CachePoolTest.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * This file is part of php-cache organization.
  *
@@ -56,6 +58,24 @@ public function tearDownService()
         }
     }
 
+    /**
+     * Accepts either \Psr\Cache\InvalidArgumentException (library-level) or
+     * \TypeError (PHP-level contract violation) as a valid failure.
+     *
+     * @param callable(): void $callable
+     */
+    private function assertCacheExceptionOrTypeError(callable $callable): void
+    {
+        try {
+            $callable();
+            $this->fail('Expected exception to be thrown.');
+        } catch (\TypeError $e) {
+            $this->assertTrue(true);
+        } catch (\Psr\Cache\InvalidArgumentException $e) {
+            $this->assertTrue(true);
+        }
+    }
+
     /**
      * Data provider for invalid keys.
      *
@@ -360,9 +380,9 @@ public function testSaveExpired()
 
         $item = $this->cache->getItem('key');
         $item->set('value');
-        $item->expiresAt(\DateTime::createFromFormat('U', time() + 10));
+        $item->expiresAt(\DateTime::createFromFormat('U', (string) (time() + 10)));
         $this->cache->save($item);
-        $item->expiresAt(\DateTime::createFromFormat('U', time() - 1));
+        $item->expiresAt(\DateTime::createFromFormat('U', (string) (time() - 1)));
         $this->cache->save($item);
         $item = $this->cache->getItem('key');
         $this->assertFalse($item->isHit(), 'Cache should not save expired items');
@@ -421,7 +441,7 @@ public function testDeferredExpired()
 
         $item = $this->cache->getItem('key');
         $item->set('4711');
-        $item->expiresAt(\DateTime::createFromFormat('U', time() - 1));
+        $item->expiresAt(\DateTime::createFromFormat('U', (string) (time() - 1)));
         $this->cache->saveDeferred($item);
 
         $this->assertFalse($this->cache->hasItem('key'), 'Cache should not have expired deferred item');
@@ -581,8 +601,9 @@ public function testGetItemInvalidKeys($key)
             $this->markTestSkipped($this->skippedTests[__FUNCTION__]);
         }
 
-        $this->expectException('Psr\Cache\InvalidArgumentException');
-        $this->cache->getItem($key);
+        $this->assertCacheExceptionOrTypeError(function () use ($key) {
+            $this->cache->getItem($key);
+        });
     }
 
     /**
@@ -609,8 +630,9 @@ public function testHasItemInvalidKeys($key)
             $this->markTestSkipped($this->skippedTests[__FUNCTION__]);
         }
 
-        $this->expectException('Psr\Cache\InvalidArgumentException');
-        $this->cache->hasItem($key);
+        $this->assertCacheExceptionOrTypeError(function () use ($key) {
+            $this->cache->hasItem($key);
+        });
     }
 
     /**
@@ -623,8 +645,9 @@ public function testDeleteItemInvalidKeys($key)
             $this->markTestSkipped($this->skippedTests[__FUNCTION__]);
         }
 
-        $this->expectException('Psr\Cache\InvalidArgumentException');
-        $this->cache->deleteItem($key);
+        $this->assertCacheExceptionOrTypeError(function () use ($key) {
+            $this->cache->deleteItem($key);
+        });
     }
 
     /**