added method to get min and max from all data and tests

src/kibana/components/vislib/visualizations/tile_map.js

@@ -37,8 +37,9 @@ define(function (require) {
       this.events = new Dispatch(handler);
 
       // add allmin and allmax to geoJson
-      chartData.geoJson.properties.allmin = chartData.geoJson.properties.min;
-      chartData.geoJson.properties.allmax = chartData.geoJson.properties.max;
+      var allMinMax = this.getMinMax(handler.data.data);
+      chartData.geoJson.properties.allmin = allMinMax.min;
+      chartData.geoJson.properties.allmax = allMinMax.max;
     }
 
     /**
@@ -195,6 +196,39 @@ define(function (require) {
       };
     };
 
+    /**
+     * get min and max for all cols, rows of data
+     *
+     * @method getMaxMin
+     * @param data {Object}
+     * @return {Object}
+     */
+    TileMap.prototype.getMinMax = function (data) {
+      var min = [];
+      var max = [];
+      var allData;
+
+      if (data.rows) {
+        allData = data.rows;
+      } else if (data.columns) {
+        allData = data.columns;
+      } else {
+        allData = [data];
+      }
+
+      allData.forEach(function (datum) {
+        min.push(datum.geoJson.properties.min);
+        max.push(datum.geoJson.properties.max);
+      });
+
+      var minMax = {
+        min: _.min(min),
+        max: _.max(max)
+      };
+
+      return minMax;
+    };
+
     /**
      * zoom map to fit all features in featureLayer
      *

test/unit/specs/vislib/visualizations/tile_map.js

@@ -196,6 +196,41 @@ define(function (require) {
           });
         });
       });
+
+      describe('getMinMax method', function () {
+        it('should return an object', function () {
+          vis.handler.charts.forEach(function (chart) {
+            var data = chart.handler.data.data;
+            expect(_.isObject(chart.getMinMax(data))).to.be(true);
+          });
+        });
+
+        it('should return the min of all features.properties.count', function () {
+          vis.handler.charts.forEach(function (chart) {
+            var data = chart.handler.data.data;
+            var min = _.chain(data.geoJson.features)
+            .map(function (n) {
+              return n.properties.count;
+            })
+            .min()
+            .value();
+            expect(chart.getMinMax(data).min).to.be(min);
+          });
+        });
+
+        it('should return the max of all features.properties.count', function () {
+          vis.handler.charts.forEach(function (chart) {
+            var data = chart.handler.data.data;
+            var max = _.chain(data.geoJson.features)
+            .map(function (n) {
+              return n.properties.count;
+            })
+            .max()
+            .value();
+            expect(chart.getMinMax(data).max).to.be(max);
+          });
+        });
+      });
     });
 
   });