add test for --help and -h flags

Author: Jake Champion

integration-tests/cli/help.test.js

@@ -0,0 +1,52 @@
+import test from 'brittle';
+import { getBinPath } from 'get-bin-path'
+import { prepareEnvironment } from '@gmrchk/cli-testing-library';
+
+const cli = await getBinPath()
+
+test('--help should return help on stdout and zero exit code', async function (t) {
+    const { execute, cleanup } = await prepareEnvironment();
+    const { code, stdout, stderr } = await execute('node',`${cli} --help`);
+    
+    t.is(code, 0);
+    t.alike(stdout, [
+        'js-compute-runtime 0.5.4',
+        'USAGE:',
+        'js-compute-runtime [FLAGS] [OPTIONS] [ARGS]',
+        'FLAGS:',
+        '-h, --help                      Prints help information',
+        '-V, --version                   Prints version information',
+        'OPTIONS:',
+        '--engine-wasm <engine-wasm>    The JS engine Wasm file path',
+        'ARGS:',
+        '<input>     The input JS script\'s file path [default: bin/index.js]',
+        '<output>    The file path to write the output Wasm module to [default: bin/main.wasm]'
+    ])
+    t.alike(stderr, [])
+
+    await cleanup();
+});
+
+test('-h should return help on stdout and zero exit code', async function (t) {
+    const { execute, cleanup } = await prepareEnvironment();
+    t.teardown(async function () {
+        await cleanup();
+    });
+    const { code, stdout, stderr } = await execute('node',`${cli} -h`);
+    
+    t.is(code, 0);
+    t.alike(stdout, [
+        'js-compute-runtime 0.5.4',
+        'USAGE:',
+        'js-compute-runtime [FLAGS] [OPTIONS] [ARGS]',
+        'FLAGS:',
+        '-h, --help                      Prints help information',
+        '-V, --version                   Prints version information',
+        'OPTIONS:',
+        '--engine-wasm <engine-wasm>    The JS engine Wasm file path',
+        'ARGS:',
+        '<input>     The input JS script\'s file path [default: bin/index.js]',
+        '<output>    The file path to write the output Wasm module to [default: bin/main.wasm]'
+    ])
+    t.alike(stderr, [])
+});