20240517

node_modules/store/plugins/observe_test.js

@@ -0,0 +1,31 @@
+module.exports = {
+	plugin: require('./observe'),
+	setup: setup,
+}
+
+function setup(store) {
+	
+	test('observe', function() {
+		store.clearAll()
+		var count = -1
+		var expect = [undefined]
+		var obsId = store.observe('foo', function(val, oldVal) {
+			count += 1
+			assert(expect[count] == val)
+			assert(expect[count - 1] == oldVal)
+		}) // count == 1
+		store.unobserve(obsId)
+
+		expect.push('bar')
+		store.set('foo', 'bar')
+		store.observe('foo', function(val, oldVal) {
+			count += 1
+			assert(expect[count] == val)
+			assert(expect[count - 1] == oldVal)
+		}) // count == 2
+
+		expect.push('bar2')
+		store.set('foo', 'bar2') // count == 3
+		assert(count + 1 == expect.length)
+	})
+}