feat: e2e tests

test/index.js

@@ -11,12 +11,18 @@ test('shows up help message without any args', async t => {
   t.snapshot(stdout);
 });
 
-test('shows version with arg -V', async t => {
-  const { stdout } = await execa(rootCommand, ['-V']);
+const matchSnapshot = async (t, arg) => {
+  const { stdout } = await execa(rootCommand, [arg]);
   t.snapshot(stdout);
-});
+};
 
-test('shows version with arg --version', async t => {
-  const { stdout } = await execa(rootCommand, ['--version']);
-  t.snapshot(stdout);
+test('shows version with arg --version', matchSnapshot, '--version');
+test('shows version with arg -V', matchSnapshot, '-V');
+test('shows help with arg -h', matchSnapshot, '-h');
+test('shows help with arg --help', matchSnapshot, '--help');
+test('shows command usage with unknown command', matchSnapshot, 'junkcmd');
+
+test('rejects promise due to error with arg -a', async t => {
+  const { stderr } = await execa(rootCommand, ['-a'], { reject: false });
+  t.snapshot(stderr);
 });

test/snapshots/index.js.md

@@ -32,3 +32,64 @@ Generated by [AVA](https://ava.li).
 > Snapshot 1
 
     '1.2.6'
+
+## rejects promise due to error with arg -a
+
+> Snapshot 1
+
+    `error: unknown option `-a'␊
+    `
+
+## shows command usage with unknown command
+
+> Snapshot 1
+
+    `Usage: teachcode <command> [options]␊
+    ␊
+    Options:␊
+      -V, --version    output the version number␊
+      -h, --help       output usage information␊
+    ␊
+    Commands:␊
+      init             Initialize challenges␊
+      submit           Submits current task␊
+      fetchtask <key>  Fetches any task as per the key supplied␊
+      showkeys         Shows keys of all the completed tasks␊
+      showcommands     Shows all commands available␊
+      ␊
+      Unknown command junkcmd.␊
+    `
+
+## shows help with arg --help
+
+> Snapshot 1
+
+    `Usage: teachcode <command> [options]␊
+    ␊
+    Options:␊
+      -V, --version    output the version number␊
+      -h, --help       output usage information␊
+    ␊
+    Commands:␊
+      init             Initialize challenges␊
+      submit           Submits current task␊
+      fetchtask <key>  Fetches any task as per the key supplied␊
+      showkeys         Shows keys of all the completed tasks␊
+      showcommands     Shows all commands available`
+
+## shows help with arg -h
+
+> Snapshot 1
+
+    `Usage: teachcode <command> [options]␊
+    ␊
+    Options:␊
+      -V, --version    output the version number␊
+      -h, --help       output usage information␊
+    ␊
+    Commands:␊
+      init             Initialize challenges␊
+      submit           Submits current task␊
+      fetchtask <key>  Fetches any task as per the key supplied␊
+      showkeys         Shows keys of all the completed tasks␊
+      showcommands     Shows all commands available`