Add Safe PHP functions

vendor/thecodingmachine/phpstan-safe-rule/tests/Rules/UseSafeFunctionsRuleTest.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace TheCodingMachine\Safe\PHPStan\Rules;
+
+use PHPStan\Testing\RuleTestCase;
+use TheCodingMachine\Safe\PHPStan\Type\Php\ReplaceSafeFunctionsDynamicReturnTypeExtension;
+
+class UseSafeFunctionsRuleTest extends RuleTestCase
+{
+    protected function getRule(): \PHPStan\Rules\Rule
+    {
+        return new UseSafeFunctionsRule();
+    }
+
+    public function testCatch()
+    {
+        $this->analyse([__DIR__ . '/data/fopen.php'], [
+            [
+                "Function fopen is unsafe to use. It can return FALSE instead of throwing an exception. Please add 'use function Safe\\fopen;' at the beginning of the file to use the variant provided by the 'thecodingmachine/safe' library.",
+                4,
+            ],
+        ]);
+    }
+
+    public function testNoCatchSafe()
+    {
+        $this->analyse([__DIR__ . '/data/safe_fopen.php'], []);
+    }
+
+    public function testExprCall()
+    {
+        $this->analyse([__DIR__ . '/data/undirect_call.php'], []);
+    }
+}