fix: Use single instead of double quotes and escape nested quotes

Author: Étienne Lévesque

src/commands/runTestFromCodeLens.ts

@@ -18,10 +18,23 @@ export default function runFromCodeLens(args: RunArgs): void {
   elixirLsTerminal.sendText(buildTestCommand(args))
 }
 
+function escapeSingleQuotes(s: string): string {
+  return isWindows() ? s : s.replace(/'/g, "'\\''");
+}
+
+function quote(s: string): string {
+  const q = isWindows() ? '"' : `'`;
+  return [q, s, q].join('');
+}
+
+function isWindows(): boolean {
+  return process.platform.includes('win32');
+}
+
 function buildTestCommand(args: RunArgs): string {
   const testFilter = buildTestInclude(args.describe, args.testName, args.module)
 
-  return `mix test --exclude test --include "${testFilter}" ${args.filePath}`
+  return `mix test --exclude test --include ${quote(escapeSingleQuotes(testFilter))} ${args.filePath}`
 }
 
 function buildTestInclude(describe: string | null, testName?: string, module?: string) {