From 9ef710b8990aaf67c7cc323a9ed7a9363951726e Mon Sep 17 00:00:00 2001
From: Paul Robert Lloyd <me+git@paulrobertlloyd.com>
Date: Fri, 22 Dec 2023 23:20:26 +0000
Subject: [PATCH] Add tests for current page filter

---
 test/lib/filters/current-page.js | 37 ++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 test/lib/filters/current-page.js

diff --git a/test/lib/filters/current-page.js b/test/lib/filters/current-page.js
new file mode 100644
index 00000000..671cdeb4
--- /dev/null
+++ b/test/lib/filters/current-page.js
@@ -0,0 +1,37 @@
+const assert = require('assert/strict')
+const { describe, it } = require('node:test')
+const currentPage = require('../../../lib/filters/current-page.js')
+
+const navigationData = [
+  { text: 'Home', href: '/' },
+  { text: 'Styles', href: '/styles' }
+]
+
+describe('currentPage filter', () => {
+  it('Indicates the home page is current', () => {
+    const result = currentPage(navigationData, '/')
+
+    assert.deepEqual(result, [
+      { text: 'Home', href: '/', current: true },
+      { text: 'Styles', href: '/styles', current: false }
+    ])
+  })
+
+  it('Indicates the section page is current', () => {
+    const result = currentPage(navigationData, '/styles')
+
+    assert.deepEqual(result, [
+      { text: 'Home', href: '/', current: false },
+      { text: 'Styles', href: '/styles', current: true }
+    ])
+  })
+
+  it('Indicates the section sub page is current', () => {
+    const result = currentPage(navigationData, '/styles/colour')
+
+    assert.deepEqual(result, [
+      { text: 'Home', href: '/', current: false },
+      { text: 'Styles', href: '/styles', current: true }
+    ])
+  })
+})