test cli steps parsing

test/cli/steps.js

@@ -0,0 +1,28 @@
+const test = require('tape');
+const cli = require('../../src/cli');
+const stdout = require('./util/readConsole').stdout;
+const stderr = require('./util/readConsole').stderr;
+
+test('testing steps parsing', async function (t) {
+
+  t.plan(2);
+
+  let out = stdout.read();
+  await cli([
+    'node', 'test',
+    '-i', 'examples/images/test.png',
+    '-s', 'invert',
+  ]);
+  out.restore();
+  t.false(out.output.includes('Added Step "invert"'), 'Steps parsed successfully');
+
+
+  let err = stderr.read();
+  await cli([
+    'node', 'test',
+    '-i', 'examples/images/test.png',
+    '-s', 'invalidStep',
+  ]);
+  err.restore();
+  t.equal(err.output, 'Please ensure all steps are valid.');
+});