Add a script that makes running jest on windows easier

Author: leeyi45

package.json

@@ -50,8 +50,8 @@
     "eslint": "eslint src",
     "format": "prettier --write \"src/**/*.{ts,tsx}\"",
     "format:ci": "prettier --list-different \"src/**/*.{ts,tsx}\"",
-    "test": "jest",
-    "test-coverage": "jest --coverage",
+    "test": "node ./scripts/run_jest.mjs",
+    "test-coverage": "test --coverage",
     "docs": "node ./scripts/docs.mjs docs",
     "jsdoc": "node ./scripts/docs.mjs",
     "autocomplete": "node ./scripts/docs.mjs autocomplete",

scripts/run_jest.mjs

@@ -0,0 +1,27 @@
+/**
+ * A script for running jest that automatically handles converting Windows
+ * style paths to Posix style paths because Jest is fussy about those
+ */
+import { fork } from 'child_process'
+import { Command } from '@commander-js/extra-typings'
+import pathlib from 'path'
+
+await new Command()
+  .argument('[patterns...]', 'Patterns to test')
+  .allowUnknownOption()
+  .action(async (patterns, args) => {
+    const newPatterns = patterns.map(pattern => pattern.split(pathlib.sep).join(pathlib.posix.sep))
+
+    const proc = fork('node_modules/jest/bin/jest.js', [
+      ...Object.entries(args),
+      ...newPatterns
+    ])
+
+    const code = await new Promise((resolve, reject) => {
+      proc.on('exit', resolve)
+      proc.on('error', reject)
+    })
+
+    process.exit(code)
+  })
+  .parseAsync()