plotly
diff --git a/‎src/components/fx/hover.js
Copy file name to clipboardExpand all lines: src/components/fx/hover.js
+4-1Lines changed: 4 additions & 1 deletion b/‎src/components/fx/hover.js
Copy file name to clipboardExpand all lines: src/components/fx/hover.js
+4-1Lines changed: 4 additions & 1 deletion
diff --git a/‎test/jasmine/tests/hover_label_test.js
Copy file name to clipboardExpand all lines: test/jasmine/tests/hover_label_test.js
+31-9Lines changed: 31 additions & 9 deletions b/‎test/jasmine/tests/hover_label_test.js
Copy file name to clipboardExpand all lines: test/jasmine/tests/hover_label_test.js
+31-9Lines changed: 31 additions & 9 deletions
@@ -1565,8 +1565,11 @@ function hoverChanged(gd, evt, oldhoverdata) {
     for(var i = oldhoverdata.length - 1; i >= 0; i--) {
         var oldPt = oldhoverdata[i];
         var newPt = gd._hoverdata[i];
+
         if(oldPt.curveNumber !== newPt.curveNumber ||
-                String(oldPt.pointNumber) !== String(newPt.pointNumber)) {
+            String(oldPt.pointNumber) !== String(newPt.pointNumber) ||
+            String(oldPt.pointNumbers) !== String(newPt.pointNumbers)
+        ) {
             return true;
         }
     }
 
@@ -942,7 +942,6 @@ describe('hover info', function() {
     describe('histogram hover info', function() {
         it('shows the data range when bins have multiple values', function(done) {
             var gd = createGraphDiv();
-            var pts;
 
             Plotly.plot(gd, [{
                 x: [0, 2, 3, 4, 5, 6, 7],
@@ -954,18 +953,15 @@ describe('hover info', function() {
                 margin: {l: 0, t: 0, r: 0, b: 0}
             })
             .then(function() {
-                gd.on('plotly_hover', function(e) { pts = e.points; });
+                var pts = null;
+                gd.once('plotly_hover', function(e) { pts = e.points; });
 
                 _hoverNatural(gd, 250, 200);
-                assertHoverLabelContent({
-                    nums: '3',
-                    axis: '3 - 5'
-                });
-            })
-            .then(function() {
+                assertHoverLabelContent({nums: '3', axis: '3 - 5'});
+                if(pts === null) fail('no hover evt triggered');
                 expect(pts.length).toBe(1);
-                var pt = pts[0];
 
+                var pt = pts[0];
                 expect(pt.curveNumber).toBe(0);
                 expect(pt.binNumber).toBe(1);
                 expect(pt.pointNumbers).toEqual([2, 3, 4]);
@@ -976,6 +972,32 @@ describe('hover info', function() {
                 expect(pt.xaxis).toBe(gd._fullLayout.xaxis);
                 expect(pt.yaxis).toBe(gd._fullLayout.yaxis);
             })
+            .then(function() {
+                var pts = null;
+                gd.once('plotly_hover', function(e) { pts = e.points; });
+
+                _hoverNatural(gd, 250, 200);
+                expect(pts).toBe(null, 'should not emit hover event on same pt');
+            })
+            .then(function() {
+                var pts = null;
+                gd.once('plotly_hover', function(e) { pts = e.points; });
+
+                _hoverNatural(gd, 350, 200);
+                assertHoverLabelContent({nums: '2', axis: '6 - 8'});
+                expect(pts.length).toBe(1);
+
+                var pt = pts[0];
+                expect(pt.curveNumber).toBe(0);
+                expect(pt.binNumber).toBe(2);
+                expect(pt.pointNumbers).toEqual([5, 6]);
+                expect(pt.x).toBe(7);
+                expect(pt.y).toBe(2);
+                expect(pt.data).toBe(gd.data[0]);
+                expect(pt.fullData).toBe(gd._fullData[0]);
+                expect(pt.xaxis).toBe(gd._fullLayout.xaxis);
+                expect(pt.yaxis).toBe(gd._fullLayout.yaxis);
+            })
             .catch(failTest)
             .then(done);
         });
Original file line number	Diff line number	Diff line change
`@@ -1565,8 +1565,11 @@ function hoverChanged(gd, evt, oldhoverdata) {`
`1565`	`1565`	`for(var i = oldhoverdata.length - 1; i >= 0; i--) {`
`1566`	`1566`	`var oldPt = oldhoverdata[i];`
`1567`	`1567`	`var newPt = gd._hoverdata[i];`
	`1568`	`+`
`1568`	`1569`	`if(oldPt.curveNumber !== newPt.curveNumber \|\|`
`1569`		`- String(oldPt.pointNumber) !== String(newPt.pointNumber)) {`
	`1570`	`+ String(oldPt.pointNumber) !== String(newPt.pointNumber) \|\|`
	`1571`	`+ String(oldPt.pointNumbers) !== String(newPt.pointNumbers)`
	`1572`	`+ ) {`
`1570`	`1573`	`return true;`
`1571`	`1574`	`}`
`1572`	`1575`	`}`