Test fixes

tests/Composer/Test/AllFunctionalTest.php

@@ -124,18 +124,10 @@ class AllFunctionalTest extends TestCase
             'COMPOSER_CACHE_DIR' => $this->testDir.'cache',
         );
 
-        // TODO in v2.3 always call with an array
-        if (method_exists('Symfony\Component\Process\Process', 'fromShellCommandline')) {
-            $cmd = array((defined('PHP_BINARY') ? PHP_BINARY : 'php'), self::$pharPath, '--no-ansi', $testData['RUN']);
-            $proc = new Process($cmd, $this->testDir, $env, null, 300);
-        } else {
-            $cmd = (defined('PHP_BINARY') ? escapeshellcmd(PHP_BINARY) : 'php') .' '.escapeshellarg(self::$pharPath).' --no-ansi '.$testData['RUN'];
-            // @phpstan-ignore-next-line
-            $proc = new Process($cmd, $this->testDir, $env, null, 300);
-        }
+        $proc = Process::fromShellCommandline(escapeshellcmd(PHP_BINARY).' '.escapeshellarg(self::$pharPath).' --no-ansi '.$testData['RUN'], $this->testDir, $env, null, 300);
         $output = '';
 
-        $exitcode = $proc->run(function ($type, $buffer) use (&$output) {
+        $exitCode = $proc->run(function ($type, $buffer) use (&$output) {
             $output .= $buffer;
         });
 
@@ -177,16 +169,16 @@ class AllFunctionalTest extends TestCase
             }
         }
         if (isset($testData['EXPECT-REGEX'])) {
-            $this->assertRegExp($testData['EXPECT-REGEX'], $this->cleanOutput($output));
+            $this->assertMatchesRegularExpression($testData['EXPECT-REGEX'], $this->cleanOutput($output));
         }
         if (isset($testData['EXPECT-REGEXES'])) {
             $cleanOutput = $this->cleanOutput($output);
             foreach (explode("\n", $testData['EXPECT-REGEXES']) as $regex) {
-                $this->assertRegExp($regex, $cleanOutput, 'Output: '.$output);
+                $this->assertMatchesRegularExpression($regex, $cleanOutput, 'Output: '.$output);
             }
         }
         if (isset($testData['EXPECT-EXIT-CODE'])) {
-            $this->assertSame($testData['EXPECT-EXIT-CODE'], $exitcode);
+            $this->assertSame($testData['EXPECT-EXIT-CODE'], $exitCode);
         }
     }
 
@@ -205,7 +197,7 @@ class AllFunctionalTest extends TestCase
 
     /**
      * @param string $file
-     * @return array<string, int|string>
+     * @return array{RUN: string, EXPECT?: string, EXPECT-EXIT-CODE?: int, EXPECT-REGEX?: string, EXPECT-REGEXES?: string, TEST?: string}
      */
     private function parseTestFile($file)
     {
@@ -262,7 +254,7 @@ class AllFunctionalTest extends TestCase
             throw new \RuntimeException('The test file must have a section named "EXPECT", "EXPECT-REGEX", or "EXPECT-REGEXES".');
         }
 
-        return $data;
+        return $data; // @phpstan-ignore-line
     }
 
     /**

tests/Composer/Test/Autoload/AutoloadGeneratorTest.php

@@ -1861,38 +1861,16 @@ EOF;
     /**
      * @param string $expected
      * @param string $actual
-     * @param string $message
-     * @param bool   $canonicalize
-     * @param bool   $ignoreCase
+     * @param string|null $message
      *
      * @return void
      */
-    public static function assertFileContentEquals($expected, $actual, $message = '', $canonicalize = false, $ignoreCase = false)
+    public static function assertFileContentEquals(string $expected, string $actual, ?string $message = null)
     {
-        self::assertEqualsNormalized(
-            file_get_contents($expected),
-            file_get_contents($actual),
-            $message ?: $expected.' equals '.$actual,
-            0,
-            10,
-            $canonicalize,
-            $ignoreCase
+        self::assertSame(
+            str_replace("\r", '', (string) file_get_contents($expected)),
+            str_replace("\r", '', (string) file_get_contents($actual)),
+            $message ?? $expected.' equals '.$actual
         );
     }
-
-    /**
-     * @param string $expected
-     * @param string $actual
-     * @param string $message
-     * @param int    $delta
-     * @param int    $maxDepth
-     * @param bool   $canonicalize
-     * @param bool   $ignoreCase
-     *
-     * @return void
-     */
-    public static function assertEqualsNormalized($expected, $actual, $message = '', $delta = 0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
-    {
-        parent::assertEquals(str_replace("\r", '', $expected), str_replace("\r", '', $actual), $message, $delta, $maxDepth, $canonicalize, $ignoreCase);
-    }
 }

tests/Composer/Test/Downloader/FileDownloaderTest.php

@@ -85,7 +85,7 @@ class FileDownloaderTest extends TestCase
             ->will($this->returnValue(array('url')))
         ;
 
-        $path = tempnam($this->getUniqueTmpDirectory(), 'c');
+        $path = $this->createTempFile($this->getUniqueTmpDirectory());
         $downloader = $this->getDownloader();
 
         try {

tests/Composer/Test/Fixtures/functional/installed-versions.test

@@ -8,7 +8,7 @@ Checks that package versions in InstalledVersions are correct on initial install
 update
 --EXPECT--
 > Hooks::preUpdate
-!!PreUpdate:["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process"]
+!!PreUpdate:["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string"]
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
 Loading composer repositories with package information
 Updating dependencies
@@ -26,12 +26,12 @@ Package operations: 6 installs, 0 updates, 0 removals%(\nAs there is no 'unzip'
   - Downloading symfony/filesystem (%v?[2-8]\.\d+\.\d+%)
   - Installing symfony/console (99999.1.2): Symlinking from symfony-console
   - Installing plugin/a (1.1.1): Symlinking from plugin-a
-!!PluginAInit["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","root/pkg"]
+!!PluginAInit["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","root/pkg"]
 !!PluginA:null
 !!PluginB:null
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
   - Installing plugin/b (2.2.2): Symlinking from plugin-b
-!!PluginBInit["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","plugin/a","root/pkg"]
+!!PluginBInit["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","plugin/a","root/pkg"]
 !!PluginA:1.1.1.0
 !!PluginB:null
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
@@ -42,7 +42,7 @@ Generating autoload files
 2 packages you are using are looking for funding.
 Use the `composer fund` command to find out more!
 > Hooks::postUpdate
-!!PostUpdate:["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","plugin/a","plugin/b","root/pkg"]
+!!PostUpdate:["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","plugin/a","plugin/b","root/pkg"]
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
 
 --EXPECT-EXIT-CODE--

tests/Composer/Test/Fixtures/functional/installed-versions2.test

@@ -7,14 +7,14 @@ Checks that package versions in InstalledVersions are correct during an upgrade.
 --RUN--
 update plugin/* symfony/console symfony/filesystem symfony/process
 --EXPECT--
-!!PluginA:1.1.1.0["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","plugin/a","plugin/b","root/pkg"]
+!!PluginA:1.1.1.0["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","plugin/a","plugin/b","root/pkg"]
 !!PluginB:2.2.2.0
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
-!!PluginB:2.2.2.0["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","plugin/a","plugin/b","root/pkg"]
+!!PluginB:2.2.2.0["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","plugin/a","plugin/b","root/pkg"]
 !!PluginA:1.1.1.0
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
 > Hooks::preUpdate
-!!PreUpdate:["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","plugin/a","plugin/b","root/pkg"]
+!!PreUpdate:["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","plugin/a","plugin/b","root/pkg"]
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
 Loading composer repositories with package information
 Updating dependencies
@@ -30,12 +30,12 @@ Package operations: 0 installs, 5 updates, 0 removals%(\nAs there is no 'unzip'
   - Downloading symfony/filesystem (%v?[2-8]\.\d+\.\d+%)
   - Upgrading symfony/console (99999.1.2 => 99999.1.3): Mirroring from symfony-console
   - Upgrading plugin/a (1.1.1 => 1.1.2): Mirroring from plugin-a
-!!PluginAInit["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","plugin/a","plugin/b","root/pkg"]
+!!PluginAInit["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","plugin/a","plugin/b","root/pkg"]
 !!PluginA:1.1.1.0
 !!PluginB:2.2.2.0
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
   - Upgrading plugin/b (2.2.2 => 2.2.3): Mirroring from plugin-b
-!!PluginBInit["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","plugin/a","plugin/b","root/pkg"]
+!!PluginBInit["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","plugin/a","plugin/b","root/pkg"]
 !!PluginA:1.1.2.0
 !!PluginB:2.2.2.0
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
@@ -45,7 +45,7 @@ Generating autoload files
 2 packages you are using are looking for funding.
 Use the `composer fund` command to find out more!
 > Hooks::postUpdate
-!!PostUpdate:["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/log","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/debug","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-mbstring","symfony/process","plugin/a","plugin/b","root/pkg"]
+!!PostUpdate:["composer/ca-bundle","composer/composer","composer/metadata-minifier","composer/pcre","composer/semver","composer/spdx-licenses","composer/xdebug-handler","justinrainbow/json-schema","psr/container","psr/log","psr/log-implementation","react/promise","seld/jsonlint","seld/phar-utils","symfony/console","symfony/deprecation-contracts","symfony/filesystem","symfony/finder","symfony/polyfill-ctype","symfony/polyfill-intl-grapheme","symfony/polyfill-intl-normalizer","symfony/polyfill-mbstring","symfony/polyfill-php73","symfony/polyfill-php80","symfony/process","symfony/service-contracts","symfony/string","plugin/a","plugin/b","root/pkg"]
 !!Versions:console:%[2-8]\.\d+\.\d+.0%;process:%[2-8]\.\d+\.\d+.0%;filesystem:%[2-8]\.\d+\.\d+.0%
 !!PluginA:1.1.2.0
 !!PluginB:2.2.3.0

tests/Composer/Test/Json/JsonFileTest.php

@@ -99,7 +99,7 @@ class JsonFileTest extends TestCase
 
     public function testSchemaValidationError()
     {
-        $file = tempnam(sys_get_temp_dir(), 'c');
+        $file = $this->createTempFile();
         file_put_contents($file, '{ "name": null }');
         $json = new JsonFile($file);
         $expectedMessage = sprintf('"%s" does not match the expected JSON schema', $file);
@@ -123,7 +123,7 @@ class JsonFileTest extends TestCase
 
     public function testSchemaValidationLaxAdditionalProperties()
     {
-        $file = tempnam(sys_get_temp_dir(), 'c');
+        $file = $this->createTempFile();
         file_put_contents($file, '{ "name": "vendor/package", "description": "generic description", "foo": "bar" }');
         $json = new JsonFile($file);
         try {
@@ -139,7 +139,7 @@ class JsonFileTest extends TestCase
 
     public function testSchemaValidationLaxRequired()
     {
-        $file = tempnam(sys_get_temp_dir(), 'c');
+        $file = $this->createTempFile();
         $json = new JsonFile($file);
 
         $expectedMessage = sprintf('"%s" does not match the expected JSON schema', $file);
@@ -209,10 +209,10 @@ class JsonFileTest extends TestCase
 
     public function testCustomSchemaValidationLax()
     {
-        $file = tempnam(sys_get_temp_dir(), 'c');
+        $file = $this->createTempFile();
         file_put_contents($file, '{ "custom": "property", "another custom": "property" }');
 
-        $schema = tempnam(sys_get_temp_dir(), 'c');
+        $schema = $this->createTempFile();
         file_put_contents($schema, '{ "properties": { "custom": { "type": "string" }}}');
 
         $json = new JsonFile($file);
@@ -225,10 +225,10 @@ class JsonFileTest extends TestCase
 
     public function testCustomSchemaValidationStrict()
     {
-        $file = tempnam(sys_get_temp_dir(), 'c');
+        $file = $this->createTempFile();
         file_put_contents($file, '{ "custom": "property" }');
 
-        $schema = tempnam(sys_get_temp_dir(), 'c');
+        $schema = $this->createTempFile();
         file_put_contents($schema, '{ "properties": { "custom": { "type": "string" }}}');
 
         $json = new JsonFile($file);

tests/Composer/Test/Package/LockerTest.php

@@ -12,6 +12,7 @@
 
 namespace Composer\Test\Package;
 
+use Composer\Json\JsonFile;
 use Composer\Package\Locker;
 use Composer\Plugin\PluginInterface;
 use Composer\IO\NullIO;
@@ -282,16 +283,13 @@ class LockerTest extends TestCase
      */
     private function createPackageMock()
     {
-        return $this->getMockBuilder('Composer\Package\PackageInterface')
-            ->getMock();
+        return $this->getMockBuilder('Composer\Package\PackageInterface')->getMock();
     }
 
     /**
      * @param array<string, string> $customData
-     *
-     * @return false|string
      */
-    private function getJsonContent(array $customData = array())
+    private function getJsonContent(array $customData = array()): string
     {
         $data = array_merge(array(
             'minimum-stability' => 'beta',
@@ -300,6 +298,6 @@ class LockerTest extends TestCase
 
         ksort($data);
 
-        return json_encode($data);
+        return JsonFile::encode($data, 0);
     }
 }

tests/Composer/Test/TestCase.php

@@ -243,4 +243,15 @@ abstract class TestCase extends \PHPUnit\Framework\TestCase
 
         return $mock;
     }
+
+    protected function createTempFile(?string $dir = null): string
+    {
+        $dir = $dir ?? sys_get_temp_dir();
+        $name = tempnam($dir, 'c');
+        if ($name === false) {
+            throw new \UnexpectedValueException('tempnam failed to create a temporary file in '.$dir);
+        }
+
+        return $name;
+    }
 }

tests/Composer/Test/Util/RemoteFilesystemTest.php

@@ -163,7 +163,7 @@ class RemoteFilesystemTest extends TestCase
     {
         $fs = new RemoteFilesystem($this->getIOInterfaceMock(), $this->getConfigMock());
 
-        $file = tempnam(sys_get_temp_dir(), 'c');
+        $file = $this->createTempFile();
         $this->assertTrue($fs->copy('http://example.org', 'file://'.__FILE__, $file));
         $this->assertFileExists($file);
         $this->assertStringContainsString('testCopy', file_get_contents($file));
@@ -182,7 +182,7 @@ class RemoteFilesystemTest extends TestCase
                 return '';
             });
 
-        $file = tempnam(sys_get_temp_dir(), 'z');
+        $file = $this->createTempFile();
         unlink($file);
 
         $fs->copy(
@@ -221,7 +221,7 @@ class RemoteFilesystemTest extends TestCase
                 }
             });
 
-        $file = tempnam(sys_get_temp_dir(), 'z');
+        $file = $this->createTempFile();
 
         $copyResult = $fs->copy(
             'http://example.org',