betodealmeida commented on a change in pull request #4606: Use 'count' as the 
default metric when available
URL: 
https://github.com/apache/incubator-superset/pull/4606#discussion_r175618707
 
 

 ##########
 File path: superset/assets/spec/javascripts/modules/utils_spec.jsx
 ##########
 @@ -69,4 +70,31 @@ describe('utils', () => {
     expect(defaultNumberFormatter(-111000000)).to.equal('-111M');
     expect(defaultNumberFormatter(-0.23)).to.equal('-230m');
   });
+  describe('mainMetric', () => {
+    it('is null when no options', () => {
+      expect(mainMetric([])).to.equal(undefined);
+      expect(mainMetric(null)).to.equal(undefined);
+    });
+    it('is prefers the "count" metric when first', () => {
+      const metrics = [
+        { metric_name: 'count' },
+        { metric_name: 'foo' },
+      ];
+      expect(mainMetric(metrics)).to.equal('count');
+    });
+    it('is prefers the "count" metric when not first', () => {
+      const metrics = [
+        { metric_name: 'foo' },
+        { metric_name: 'count' },
+      ];
+      expect(mainMetric(metrics)).to.equal('count');
+    });
+    it('it selects the first metric when "count" is not an option', () => {
 
 Review comment:
   Nit: remove "it" before "selects".

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