Add unit test.

1 files changed, 28 insertions, 0 deletions

diff --git a/Timeline/ClientApp/src/app/test-utilities/storage.mock.ts b/Timeline/ClientApp/src/app/test-utilities/storage.mock.ts
new file mode 100644
index 00000000..0ba5aa35
--- /dev/null
+++ b/Timeline/ClientApp/src/app/test-utilities/storage.mock.ts
@@ -0,0 +1,28 @@
+import { Mock } from './mock';
+import { nullIfUndefined } from '../utilities/language-untilities';
+
+export function createMockStorage(): Mock<Storage> {
+  const map: { [key: string]: string } = {};
+  return {
+    get length(): number {
+      return Object.keys(map).length;
+    },
+    key(index: number): string | null {
+      const keys = Object.keys(map);
+      if (index >= keys.length) { return null; }
+      return keys[index];
+    },
+    clear() {
+      Object.keys(map).forEach(key => delete map.key);
+    },
+    getItem(key: string): string | null {
+      return nullIfUndefined(map[key]);
+    },
+    setItem(key: string, value: string) {
+      map[key] = value;
+    },
+    removeItem(key: string) {
+      delete map[key];
+    }
+  };
+}