Add unit tests for browser detection

1 files changed, 55 insertions, 0 deletions

diff --git a/tests/test.browser.js b/tests/test.browser.js
new file mode 100644
index 0000000..ae446cc
--- /dev/null
+++ b/tests/test.browser.js
@@ -0,0 +1,55 @@
+/* eslint-disable no-console */
+const expect = chai.expect;
+
+import { isSafari, isFirefox } from '../core/util/browser.js';
+
+describe('Browser detection', function () {
+    let origNavigator;
+    beforeEach(function () {
+        // window.navigator is a protected read-only property in many
+        // environments, so we need to redefine it whilst running these
+        // tests.
+        origNavigator = Object.getOwnPropertyDescriptor(window, "navigator");
+
+        Object.defineProperty(window, "navigator", {value: {}});
+    });
+
+    afterEach(function () {
+        Object.defineProperty(window, "navigator", origNavigator);
+    });
+
+    it('should handle Chrome', function () {
+        navigator.userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36";
+
+        expect(isSafari()).to.be.false;
+        expect(isFirefox()).to.be.false;
+    });
+
+    it('should handle Chromium', function () {
+        navigator.userAgent = "Mozilla/5.0 (X11; Linux armv7l) AppleWebKit/537.36 (KHTML, like Gecko) Raspbian Chromium/74.0.3729.157 Chrome/74.0.3729.157 Safari/537.36";
+
+        expect(isSafari()).to.be.false;
+        expect(isFirefox()).to.be.false;
+    });
+
+    it('should handle Firefox', function () {
+        navigator.userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0";
+
+        expect(isSafari()).to.be.false;
+        expect(isFirefox()).to.be.true;
+    });
+
+    it('should handle Edge', function () {
+        navigator.userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36 Edg/106.0.1370.34";
+
+        expect(isSafari()).to.be.false;
+        expect(isFirefox()).to.be.false;
+    });
+
+    it('should handle Opera', function () {
+        navigator.userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36 OPR/91.0.4516.20";
+
+        expect(isSafari()).to.be.false;
+        expect(isFirefox()).to.be.false;
+    });
+});