test: refactor common.ddCommand()

* Remove different paths for Windows and POSIX.
* Remove fixtures file. Simply run the command immediately/directly.
* Since it is never called with more than one value for kilobytes,
  eliminate that argument.
* Update/simplify tests that use this function. (They no longer need to
  use child_process to run the command.)
* Update documentation.

PR-URL: https://github.com/nodejs/node/pull/23411
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: George Adams <george.adams@uk.ibm.com>

1 files changed, 0 insertions, 29 deletions

diff --git a/test/fixtures/create-file.js b/test/fixtures/create-file.js
deleted file mode 100644
index ec0d8243d3..0000000000
--- a/test/fixtures/create-file.js
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-const fs = require('fs');
-
-var file_name = process.argv[2];
-var file_size = parseInt(process.argv[3]);
-
-var fd = fs.openSync(file_name, 'w');
-fs.ftruncateSync(fd, file_size);
-fs.closeSync(fd);