test: describeIf and testIf utilities for conditional testing

package.json

@@ -137,6 +137,7 @@
     "node-gyp-build": "4.4.0",
     "pkg": "5.6.0",
     "prettier": "^2.6.2",
+    "shelljs": "^0.8.5",
     "shx": "^0.3.4",
     "ts-jest": "^27.0.5",
     "ts-node": "^10.4.0",

shell.nix

@@ -10,7 +10,6 @@ in
       utils.node2nix
       grpc-tools
       grpcurl
-      iptables-legacy
     ];
     PKG_CACHE_PATH = utils.pkgCachePath;
     PKG_IGNORE_TAG = 1;

tests/bin/utils.ts

@@ -12,6 +12,35 @@ import nexpect from 'nexpect';
 import Logger from '@matrixai/logger';
 import main from '@/bin/polykey';
 
+/**
+ * Wrapper for execFile to make it asynchronous and non-blocking
+ */
+async function exec(
+  command: string,
+  args: Array<string> = [],
+): Promise<{
+  stdout: string;
+  stderr: string;
+}> {
+  return new Promise((resolve, reject) => {
+    child_process.execFile(
+      command,
+      args,
+      { windowsHide: true },
+      (error, stdout, stderr) => {
+        if (error) {
+          reject(error);
+        } else {
+          return resolve({
+            stdout,
+            stderr,
+          });
+        }
+      },
+    );
+  });
+}
+
 /**
  * Runs pk command functionally
  */
@@ -361,6 +390,7 @@ function expectProcessError(
 }
 
 export {
+  exec,
   pk,
   pkStdio,
   pkExec,