add Axes.expand test cases for early returns and range sliders

Author: etpinard

test/jasmine/tests/axes_test.js

@@ -1449,6 +1449,38 @@ describe('Test axes', function() {
             expect(ax._min).toEqual([{val: 0, pad: 0}]);
             expect(ax._max).toEqual([{val: 6, pad: 15}]);
         });
+
+        it('should return early if no data is given', function() {
+            ax = getDefaultAx();
+
+            expand(ax);
+            expect(ax._min).toBeUndefined();
+            expect(ax._max).toBeUndefined();
+        });
+
+        it('should return early if `autorange` is falsy', function() {
+            ax = getDefaultAx();
+            data = [2, 5];
+
+            ax.autorange = false;
+            ax.rangeslider = { autorange: false };
+
+            expand(ax, data, {});
+            expect(ax._min).toBeUndefined();
+            expect(ax._max).toBeUndefined();
+        });
+
+        it('should consider range slider `autorange`', function() {
+            ax = getDefaultAx();
+            data = [2, 5];
+
+            ax.autorange = false;
+            ax.rangeslider = { autorange: true };
+
+            expand(ax, data, {});
+            expect(ax._min).toEqual([{val: 2, pad: 0}]);
+            expect(ax._max).toEqual([{val: 5, pad: 0}]);
+        });
     });
 
     describe('calcTicks and tickText', function() {