Adding upstream version 1.2.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/memoize.js

@@ -0,0 +1,72 @@
+import { memoize } from '..';
+import { expect } from 'chai';
+
+/*global describe,it*/
+
+describe('memoize()', () => {
+	it('should memoize when used as a simple decorator', next => {
+		let c = {
+			@memoize
+			foo(key) {
+				c[key] = (c[key] || 0) + 1;
+			}
+		};
+
+		expect(c).not.to.have.property('a');
+		c.foo('a');
+		expect(c).to.have.property('a', 1);
+		c.foo('a');
+		c.foo('a');
+		expect(c).to.have.property('a', 1);
+
+		next();
+	});
+
+	it('should memoize when used as a function', next => {
+		let c = memoize( key => {
+				m[key] = (m[key] || 0) + 1;
+			}),
+			m = {};
+
+		expect(m).not.to.have.property('a');
+		c('a');
+		expect(m).to.have.property('a', 1);
+		c('a');
+		c('a');
+		expect(m).to.have.property('a', 1);
+
+		next();
+	});
+
+	it('should memoize when called without arguments', next => {
+		let c = memoize( key => {
+				m[key] = (m[key] || 0) + 1;
+			}),
+			m = {};
+
+		expect(m).not.to.have.property('undefined');
+		c();
+		expect(m).to.have.property('undefined', 1);
+		c();
+		c();
+		expect(m).to.have.property('undefined', 1);
+
+		next();
+	});
+
+	it('should memoize when called with an empty string', next => {
+		let c = memoize( key => {
+				m[key] = (m[key] || 0) + 1;
+			}),
+			m = {};
+
+		expect(m).not.to.have.property('');
+		c('');
+		expect(m).to.have.property('', 1);
+		c('');
+		c('');
+		expect(m).to.have.property('', 1);
+
+		next();
+	});
+});