Tools: Moved lib-specific tests under lib package

packages/lib/InMemoryCache.test.ts

@@ -0,0 +1,64 @@
+import InMemoryCache from './InMemoryCache';
+import time from './time';
+
+describe('InMemoryCache', function() {
+
+	it('should get and set values', () => {
+		const cache = new InMemoryCache();
+
+		expect(cache.value('test')).toBe(undefined);
+		expect(cache.value('test', 'default')).toBe('default');
+
+		cache.setValue('test', 'something');
+		expect(cache.value('test')).toBe('something');
+
+		// Check we get the exact same object back (cache should not copy)
+		const someObj = { abcd: '123' };
+		cache.setValue('someObj', someObj);
+		expect(cache.value('someObj')).toBe(someObj);
+	});
+
+	it('should expire values', async () => {
+		const cache = new InMemoryCache();
+
+		// Check that the value is udefined once the cache has expired
+		cache.setValue('test', 'something', 500);
+		expect(cache.value('test')).toBe('something');
+		await time.msleep(510);
+		expect(cache.value('test')).toBe(undefined);
+
+		// This test can sometimes fail in some cases, probably because it
+		// sleeps for more than 100ms (when the computer is slow). Changing this
+		// to use higher values would slow down the test unit too much, so let's
+		// disable it for now.
+
+		// Check that the TTL is reset every time setValue is called
+		// cache.setValue('test', 'something', 300);
+		// await time.msleep(100);
+		// cache.setValue('test', 'something', 300);
+		// await time.msleep(100);
+		// cache.setValue('test', 'something', 300);
+		// await time.msleep(100);
+		// cache.setValue('test', 'something', 300);
+		// await time.msleep(100);
+
+		// expect(cache.value('test')).toBe('something');
+	});
+
+	it('should delete old records', async () => {
+		const cache = new InMemoryCache(5);
+
+		cache.setValue('1', '1');
+		cache.setValue('2', '2');
+		cache.setValue('3', '3');
+		cache.setValue('4', '4');
+		cache.setValue('5', '5');
+
+		expect(cache.value('1')).toBe('1');
+
+		cache.setValue('6', '6');
+
+		expect(cache.value('1')).toBe(undefined);
+	});
+
+});