first commit

uebersicht-code/server/spec/backend/widgetify_spec.js

@@ -0,0 +1,83 @@
+var test = require('tape');
+var widgetify = require('../../src/widgetify');
+var through = require('through2');
+
+function grabOutput(then) {
+  var output = '';
+  return through(
+    (chunk, enc, next) => { output += chunk; next(); },
+    (next) => { then(output); next(); }
+  );
+}
+
+test('transforming valid widgets', (t) => {
+  var transform = widgetify('path/', { id: 'foo' });
+  var src = `
+    var color = '#ff';
+    var stuff = 1+2;
+    color = color + 'f';
+    ({
+      foo: 14,
+      style: 'color: ' + color,
+      refreshFrequency: '2s'
+    })
+  `;
+
+  transform.pipe( grabOutput((transformed) => {
+    const module = {};
+    new Function('module', transformed)(module);
+
+    t.ok(
+      typeof module.exports === 'object',
+      'it assigns the last object expression to module.exports'
+    );
+    t.equal(
+      module.exports.id, 'foo',
+      'it adds the widget id'
+    );
+    t.equal(
+      module.exports.refreshFrequency, 2000,
+      'it parses string refresh frequencies'
+    );
+    t.equal(
+      module.exports.css, '#foo {\n  color: #fff;\n}\n',
+      'it parses and scopes styles, including interpolated variables'
+    );
+    t.equal(
+      module.exports.style, undefined,
+      'it cleans up the style property'
+    );
+
+    t.end();
+  }));
+
+  transform.write(src);
+  transform.end();
+});
+
+test('transforming a widget with a syntax error', (t) => {
+  var transform = widgetify('path/', { id: 'foo' });
+  var src = `
+    ({
+      foo: 14,
+      style: 'color: ' + color,
+      refreshFrequency: '2s'
+    })
+  `;
+
+  transform
+    .on('error', (e) => {
+      t.pass('it emits an error');
+      t.ok(
+        e.name === 'ReferenceError' && e.message === 'color is not defined',
+        'the error looks ok'
+      );
+      t.end();
+    })
+    .pipe(grabOutput((transformed) => {
+      t.ok(!transformed, 'and there is no outout');
+    }));
+
+  transform.write(src);
+  transform.end();
+});