Add a newline character to the output of a file (#196)

- Add a newline character at the end of the outputted file contents
- This is so it follows POSIX convention

#80

Reviewed-on: #196
Reviewed-by: VylpesTester <tester@vylpes.com>
Co-authored-by: Ethan Lane <ethan@vylpes.com>
Co-committed-by: Ethan Lane <ethan@vylpes.com>

src/helpers/cliHelper.ts

@@ -9,7 +9,7 @@ export default class CliHelper {
             const output = OutputHelper.GenerateOutput(response, options);
 
             if (options.o) {
-                writeFileSync(options.o, output);
+                writeFileSync(options.o, `${output}\n`);
             } else {
                 console.log(output);
             }

tests/helpers/cliHelper.test.ts

@@ -35,7 +35,7 @@ describe("Endpoint", () => {
             expect(OutputHelper.GenerateOutput).toHaveBeenCalledWith(response, options);
 
             expect(fs.writeFileSync).toHaveBeenCalledTimes(1);
-            expect(fs.writeFileSync).toHaveBeenCalledWith("file.txt", "test output");
+            expect(fs.writeFileSync).toHaveBeenCalledWith("file.txt", "test output\n");
 
             expect(console.log).not.toHaveBeenCalled();