Add tests

test/browser/spec/ol/control/scaleline.test.js

@@ -79,6 +79,19 @@ describe('ol.control.ScaleLine', function () {
       });
     });
 
+    describe('maxWidth', function () {
+      it('defaults to undefined', function () {
+        const ctrl = new ScaleLine();
+        expect(ctrl.maxWidth_).to.be(undefined);
+      });
+      it('can be configured', function () {
+        const ctrl = new ScaleLine({
+          maxWidth: 4711,
+        });
+        expect(ctrl.maxWidth_).to.be(4711);
+      });
+    });
+
     describe('render', function () {
       it('defaults to `ol.control.ScaleLine.render`', function () {
         const ctrl = new ScaleLine();
@@ -325,6 +338,21 @@ describe('ol.control.ScaleLine', function () {
       expect(ctrl.element.innerText).to.be('100 km');
     });
 
+    it('maxWidth is applied correctly', function () {
+      const ctrl = new ScaleLine({maxWidth: 50});
+      ctrl.setMap(map);
+      map.setView(
+        new View({
+          center: fromLonLat([-85.685, 39.891], 'Indiana-East'),
+          zoom: 7,
+          projection: 'Indiana-East',
+        })
+      );
+      map.renderSync();
+      // without maxWidth set this would be 100 km
+      expect(ctrl.element.innerText).to.be('50 km');
+    });
+
     it('shows the same scale for different projections at higher resolutions', function () {
       const ctrl = new ScaleLine();
       ctrl.setMap(map);