test(index): verify that expected errors are thrown

Author: remarkablemark

test/data.js

@@ -68,7 +68,24 @@ const snapshots = [
   ]
 ];
 
+const errors = [
+  undefined,
+  null,
+  true,
+  false,
+  0,
+  1,
+  {},
+  Object,
+  Array,
+  Date,
+  Function,
+  () => {},
+  'overflow'
+];
+
 module.exports = {
   cases,
+  errors,
   snapshots
 };

test/index.spec.js

@@ -1,6 +1,6 @@
 const cssParse = require('css/lib/parse');
 const inlineStyleParser = require('..');
-const { cases, snapshots } = require('./data');
+const { cases, errors, snapshots } = require('./data');
 
 /**
  * @param {string} inlineStyle
@@ -37,6 +37,11 @@ it.each(snapshots)('%s', (_name, style) => {
   expect(inlineStyleParser(style)).toMatchSnapshot();
 });
 
+// errors
+it.each(errors)('throws error when argument is "%s"', value => {
+  expect(() => inlineStyleParser(value)).toThrow();
+});
+
 // one-off
 it.each`
   style  | expected