Fix Filesystem tests failing in Windows (#32975)

* testPutWithStreamInterface() leaves an fopen()
  stream resource that must be explicitly closed
  before temp directories can be deleted in
  Windows.
* testReplaceStoresFiles() fails for multiple
  reasons under Windows. chmod() / umask() write
  permissions don't change and symlink() attempts
  fail in most Windows environments.

tests/Filesystem/FilesystemAdapterTest.php

@@ -236,8 +236,10 @@ public function testPutWithStreamInterface()
         $spy = m::spy($this->filesystem);
 
         $filesystemAdapter = new FilesystemAdapter($spy);
-        $stream = new Stream(fopen($this->tempDir.'/foo.txt', 'r'));
-        $filesystemAdapter->put('bar.txt', $stream);
+        $stream = fopen($this->tempDir.'/foo.txt', 'r');
+        $guzzleStream = new Stream($stream);
+        $filesystemAdapter->put('bar.txt', $guzzleStream);
+        fclose($stream);
 
         $spy->shouldHaveReceived('putStream');
         $this->assertEquals('some-data', $filesystemAdapter->get('bar.txt'));

tests/Filesystem/FilesystemTest.php

@@ -43,8 +43,22 @@ public function testPutStoresFiles()
         $this->assertStringEqualsFile($this->tempDir.'/file.txt', 'Hello World');
     }
 
-    public function testReplaceStoresFiles()
+    public function testReplaceCreatesFile()
     {
+        $tempFile = "{$this->tempDir}/file.txt";
+
+        $filesystem = new Filesystem;
+
+        $filesystem->replace($tempFile, 'Hello World');
+        $this->assertStringEqualsFile($tempFile, 'Hello World');
+    }
+
+    public function testReplaceWhenUnixSymlinkExists()
+    {
+        if (windows_os()) {
+            $this->markTestSkipped('Skipping since operating system is Windows');
+        }
+
         $tempFile = "{$this->tempDir}/file.txt";
         $symlinkDir = "{$this->tempDir}/symlink_dir";
         $symlink = "{$symlinkDir}/symlink.txt";