link

node_modules/lru-memoizer/test/lru-memoizer.clone.test.js

@@ -0,0 +1,44 @@
+const memoizer = require('./..');
+const assert = require('chai').assert;
+
+describe('lru-memoizer (clone)', () => {
+  let loadTimes = 0, memoized;
+
+  beforeEach(() => {
+    loadTimes = 0;
+
+    memoized = memoizer({
+      load: (key, callback) => {
+        loadTimes++;
+        callback(null, { foo: key, buffer: Buffer.from('1234') });
+      },
+      hash: (key) => {
+        return key;
+      },
+      clone: true
+    });
+  });
+
+  it('should return a clone every time with the same cached structure', (done) => {
+    memoized('bar', (err, r1) => {
+
+      assert.isNull(err);
+      assert.strictEqual(loadTimes, 1);
+      assert.equal(r1.foo, 'bar');
+      r1.foo = 'bax';
+
+      memoized('bar', (err, r2) => {
+        assert.isNull(err);
+
+        assert.strictEqual(loadTimes, 1);
+        assert.equal(r2.foo, 'bar');
+        assert.notStrictEqual(r1, r2);
+        assert.notEqual(r1, r2);
+
+        done();
+      });
+    });
+  });
+
+});
+