Add node tests

test/node/ol/obj.test.js

@@ -0,0 +1,67 @@
+import expect from '../expect.js';
+import {assign, clear, getValues, isEmpty} from '../../../src/ol/obj.js';
+
+describe('ol/obj.js', () => {
+  describe('assign()', function () {
+    it('is an alias for Object.assign() where available', function () {
+      if (typeof Object.assign === 'function') {
+        expect(assign).to.be(Object.assign);
+      }
+    });
+
+    it('assigns properties from a source object to a target object', function () {
+      const source = {
+        sourceProp1: 'sourceValue1',
+        sourceProp2: 'sourceValue2',
+      };
+
+      const target = {
+        sourceProp1: 'overridden',
+        targetProp1: 'targetValue1',
+      };
+
+      const assigned = assign(target, source);
+      expect(assigned).to.be(target);
+      expect(assigned.sourceProp1).to.be('sourceValue1');
+      expect(assigned.sourceProp2).to.be('sourceValue2');
+      expect(assigned.targetProp1).to.be('targetValue1');
+    });
+
+    it('throws a TypeError with `undefined` as target', function () {
+      expect(() => assign()).to.throwException(
+        /Cannot convert undefined or null to object/
+      );
+    });
+
+    it('throws a TypeError with `null` as target', function () {
+      expect(() => assign(null)).to.throwException(
+        /Cannot convert undefined or null to object/
+      );
+    });
+  });
+
+  describe('clear()', function () {
+    it('removes all properties from an object', function () {
+      expect(isEmpty(clear({foo: 'bar'}))).to.be(true);
+      expect(isEmpty(clear({foo: 'bar', num: 42}))).to.be(true);
+      expect(isEmpty(clear({}))).to.be(true);
+      expect(isEmpty(clear(null))).to.be(true);
+    });
+  });
+
+  describe('getValues()', function () {
+    it('gets a list of property values from an object', function () {
+      expect(getValues({foo: 'bar', num: 42}).sort()).to.eql([42, 'bar']);
+      expect(getValues([])).to.eql([]);
+    });
+  });
+
+  describe('isEmpty()', function () {
+    it('checks if an object has any properties', function () {
+      expect(isEmpty({})).to.be(true);
+      expect(isEmpty(null)).to.be(true);
+      expect(isEmpty({foo: 'bar'})).to.be(false);
+      expect(isEmpty({foo: false})).to.be(false);
+    });
+  });
+});