chore: traits

packages/traits/test/trait.js

@@ -0,0 +1,55 @@
+import {expect} from 'chai';
+
+import Trait from '../src/trait';
+
+class TestTrait extends Trait {
+
+  static defaultParams() {
+    return {
+      asd: 'hello',
+      sdf: 311,
+    };
+  }
+
+  static defaultState() {
+    return {
+      foo: 69,
+      bar: '420',
+    };
+  }
+
+}
+
+it('can set and override default params and state', () => {
+  const testTrait = new TestTrait({
+    params: {
+      asd: 'boo',
+    },
+    state: {
+      bar: 'yee',
+    },
+  });
+  expect(testTrait.toJSON()).to.deep.equal({
+    params: {
+      asd: 'boo',
+      sdf: 311,
+    },
+    state: {
+      bar: 'yee',
+      foo: 69,
+    },
+  });
+});
+
+it('tracks state differences', () => {
+  const testTrait = new TestTrait();
+  testTrait.state.foo = 420;
+  expect(testTrait.stateDifferences()).to.deep.equal({
+    foo: {
+      old: 69,
+      value: 420,
+    },
+  });
+  testTrait.markAsClean();
+  expect(testTrait.stateDifferences()).to.deep.equal({});
+});