chore: test case for default behavior

__e2e__/__snapshots__/default.test.ts.snap

@@ -0,0 +1,13 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`shows up help information without passing in any args 1`] = `
+"Usage: bin [options] [command] <command>
+
+Options:
+  --version                     Print CLI version
+  --verbose                     Increase logging verbosity
+  -h, --help                    output usage information
+
+Commands:
+  init [options] <projectName>  Initialize a new React Native project named <projectName> in a directory of the same name."
+`;

__e2e__/default.test.ts

@@ -0,0 +1,16 @@
+import {run, getTempDirectory, cleanup, writeFiles} from '../jest/helpers';
+
+const DIR = getTempDirectory('test_default_behavior');
+
+beforeEach(() => {
+  cleanup(DIR);
+  writeFiles(DIR, {});
+});
+afterEach(() => {
+  cleanup(DIR);
+});
+
+test('shows up help information without passing in any args', () => {
+  const {stdout} = run(DIR);
+  expect(stdout).toMatchSnapshot();
+});