add tests for various cases

Author: archmoj

test/jasmine/tests/geo_test.js

@@ -2824,3 +2824,84 @@ describe('plotly_relayouting', function() {
         });
     });
 });
+
+
+describe('minscale and maxscale', function() {
+    function scroll(pos, delta) {
+        return new Promise(function(resolve) {
+            mouseEvent('mousemove', pos[0], pos[1]);
+            mouseEvent('scroll', pos[0], pos[1], {deltaX: delta[0], deltaY: delta[1]});
+            setTimeout(resolve, 100);
+        });
+    }
+
+    var gd;
+
+    beforeEach(function() { gd = createGraphDiv(); });
+
+    afterEach(destroyGraphDiv);
+
+    var allTests = [
+        {
+            name: 'non-clipped',
+            mock: require('../../image/mocks/geo_winkel-tripel'),
+            initialScale: 101.85972947889438
+        },
+        {
+            name: 'clipped',
+            mock: require('../../image/mocks/geo_orthographic'),
+            initialScale: 160.0000000243694,
+        },
+        {
+            name: 'scoped',
+            mock: require('../../image/mocks/geo_europe-bubbles'),
+            initialScale: 294.0932287044594
+        }
+    ];
+
+    allTests.forEach(function(test) {
+        it(test.name + ' maxscale', function(done) {
+            var initialScale = test.initialScale;
+
+            var fig = Lib.extendDeep({}, test.mock);
+            fig.layout.width = 700;
+            fig.layout.height = 500;
+            fig.layout.dragmode = 'pan';
+            if(!fig.layout.geo.projection) fig.layout.geo.projection = {};
+            fig.layout.geo.projection.maxscale = 1.1;
+
+            Plotly.newPlot(gd, fig)
+            .then(function() {
+                expect(gd._fullLayout.geo._subplot.projection.scale()).toEqual(initialScale);
+
+                return scroll([200, 250], [-200, -200]);
+            })
+            .then(function() {
+                expect(gd._fullLayout.geo._subplot.projection.scale()).toEqual(1.1 * initialScale);
+            })
+            .then(done, done.fail);
+        });
+
+        it(test.name + ' minscale', function(done) {
+            var initialScale = test.initialScale;
+
+            var fig = Lib.extendDeep({}, test.mock);
+            fig.layout.width = 700;
+            fig.layout.height = 500;
+            fig.layout.dragmode = 'pan';
+            if(!fig.layout.geo.projection) fig.layout.geo.projection = {};
+            fig.layout.geo.projection.minscale = 0.9;
+
+            Plotly.newPlot(gd, fig)
+            .then(function() {
+                expect(gd._fullLayout.geo._subplot.projection.scale()).toEqual(initialScale);
+
+                return scroll([200, 250], [200, 200]);
+            })
+            .then(function() {
+                expect(gd._fullLayout.geo._subplot.projection.scale()).toEqual(0.9 * initialScale);
+            })
+            .then(done, done.fail);
+        });
+    });
+});