[INTERNAL] Add basic CLI test

Author: matz3

package-lock.json

@@ -115,6 +115,7 @@
 		"docdash": "^1.0.0",
 		"eslint": "^5.0.1",
 		"eslint-config-google": "^0.10.0",
+		"execa": "^1.0.0",
 		"jsdoc": "^3.5.5",
 		"nyc": "^13.0.1",
 		"opn-cli": "^3.1.0",

package.json

@@ -0,0 +1,16 @@
+const {test} = require("ava");
+const path = require("path");
+const execa = require("execa");
+const pkg = require("../../../../package.json");
+const ui5Cli = path.join(__dirname, "..", "..", "..", "..", "bin", "ui5.js");
+const ui5 = (args, options = {}) => execa(ui5Cli, args, options);
+
+test("ui5 --version", async (t) => {
+	const {stdout} = await ui5(["--version"]);
+	t.is(stdout, pkg.version);
+});
+
+test("ui5 -v", async (t) => {
+	const {stdout} = await ui5(["-v"]);
+	t.is(stdout, pkg.version);
+});