test: add test for measureText (#1416)

tests/unit/test-measure-text.js

@@ -0,0 +1,27 @@
+/* global describe, it */
+
+import assert from 'assert'
+import { measureText } from '../../src/routes/_utils/measureText'
+
+describe('test-measure-text.js', () => {
+  it('measures text correctly', () => {
+    assert.deepStrictEqual(measureText(undefined), 0)
+    assert.deepStrictEqual(measureText(''), 0)
+    assert.deepStrictEqual(measureText('foo'), 3)
+    assert.deepStrictEqual(measureText('\ud83c\udf4d\ud83c\udf4d'), 2)
+    assert.deepStrictEqual(measureText('hello world http://example.com/super/long/url/that/should/be/shortened'), 70)
+    assert.deepStrictEqual(measureText(' @fooooooooooooooooooooooooooooooooooooooooooooooo@example.com '), 51)
+    assert.deepStrictEqual(measureText(' @fooooooooooooooooooooooooooooooooooooooooooooooooooo@example.com '), 55)
+    assert.deepStrictEqual(measureText(' @fooooooooooooooooooooooooooooooooooooooooooooooo@exaaaaaample.com '), 51)
+    assert.deepStrictEqual(measureText(
+      'hello world http://example.com/super/long/url/that/should/be/shortened and ' +
+      'another url http://example.com/super/long/url/that/should/be/shortened/too'),
+    149)
+    assert.deepStrictEqual(measureText(
+      'hello world http://example.com/super/long/url/that/should/be/shortened and ' +
+      'another url http://example.com/super/long/url/that/should/be/shortened/too and' +
+      'also a handle @foooooooooooooooooooooooooooooooo@example.com @baaaar@exaaaaaaaaaaample.com and ' +
+      '@foooooooooooooooooooooooooo@example.com'),
+    242)
+  })
+})