Organize tests

test/browser/spec/ol/index.test.js

@@ -0,0 +1,22 @@
+import {getUid} from '../../../../src/ol/util.js';
+
+describe('getUid()', function () {
+  it('is constant once generated', function () {
+    const a = {};
+    expect(getUid(a)).to.be(getUid(a));
+  });
+
+  it('generates a strictly increasing sequence', function () {
+    const a = {};
+    const b = {};
+    const c = {};
+    getUid(a);
+    getUid(c);
+    getUid(b);
+
+    //uid order should be a < c < b
+    expect(getUid(a)).to.be.lessThan(getUid(c));
+    expect(getUid(c)).to.be.lessThan(getUid(b));
+    expect(getUid(a)).to.be.lessThan(getUid(b));
+  });
+});