From 526c940a9430e8a83e7d42a409eb5cd04cc69d3b Mon Sep 17 00:00:00 2001
From: Josh Gross <joshmgross@github.com>
Date: Thu, 31 Oct 2019 15:05:59 -0400
Subject: [PATCH] Prevent commands from executing during tests (#21)

* Prevent commands from executing during tests

* Add newline at end of file

* Drop all commands from output
---
 jest.config.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/jest.config.js b/jest.config.js
index 563d4cc..42e7e56 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -8,4 +8,13 @@ module.exports = {
     '^.+\\.ts$': 'ts-jest'
   },
   verbose: true
+}
+
+const processStdoutWrite = process.stdout.write.bind(process.stdout)
+process.stdout.write = (str, encoding, cb) => {
+  // Core library will directly call process.stdout.write for commands
+  // We don't want :: commands to be executed by the runner during tests
+  if (!str.match(/^::/)) {
+    return processStdoutWrite(str, encoding, cb);
+  }
 }
\ No newline at end of file