Add node tests

test/node/ol/geom/flat/area.test.js

@@ -0,0 +1,28 @@
+import expect from '../../../expect.js';
+import {linearRing, linearRings} from '../../../../../src/ol/geom/flat/area.js';
+
+describe('ol/geom/flat/area.js', function () {
+  describe('linearRing', function () {
+    it('calculates the area of a triangle', function () {
+      const area = linearRing([0, 0, 0.5, 1, 1, 0], 0, 6, 2);
+      expect(area).to.be(0.5);
+    });
+
+    it('calculates the area of a unit square', function () {
+      const area = linearRing([0, 0, 0, 1, 1, 1, 1, 0], 0, 8, 2);
+      expect(area).to.be(1);
+    });
+  });
+
+  describe('linearRings', function () {
+    it('calculates the area with holes', function () {
+      const area = linearRings(
+        [0, 0, 0, 3, 3, 3, 3, 0, 1, 1, 2, 1, 2, 2, 1, 2],
+        0,
+        [8, 16],
+        2
+      );
+      expect(area).to.be(8);
+    });
+  });
+});