From 270f7bf4a6b77798df4ab1e1086047523609b018 Mon Sep 17 00:00:00 2001
From: dominik-zeglen <flesz3@o2.pl>
Date: Tue, 10 Sep 2019 18:02:35 +0200
Subject: [PATCH] Add tests

---
 src/components/Locale/Locale.test.ts | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 src/components/Locale/Locale.test.ts

diff --git a/src/components/Locale/Locale.test.ts b/src/components/Locale/Locale.test.ts
new file mode 100644
index 000000000..082a9a1e3
--- /dev/null
+++ b/src/components/Locale/Locale.test.ts
@@ -0,0 +1,25 @@
+import { getMatchingLocale, Locale } from "./Locale";
+
+describe("Matches locale to browser settings", () => {
+  it("if first language is an exact match", () => {
+    const locales = ["fr", "es", "en"];
+
+    expect(getMatchingLocale(locales)).toBe(Locale.FR);
+  });
+
+  it("if there is an exact match, but it's not first preference", () => {
+    const locales = ["does-not-exist", "tr", "de", "fr"];
+
+    expect(getMatchingLocale(locales)).toBe(Locale.TR);
+  });
+
+  it("or returns undefined if there is no match", () => {
+    const locales = [
+      "does-not-exist-1",
+      "does-not-exist-2",
+      "does-not-exist-3"
+    ];
+
+    expect(getMatchingLocale(locales)).toBe(undefined);
+  });
+});