Weird execution order for the tests...

public/app/plugins/datasource/prometheus/datasource.ts

@@ -175,8 +175,12 @@ export class PrometheusDatasource {
           responseIndex: index,
           refId: activeTargets[index].refId,
         };
-
+        console.log('format: ' + transformerOptions.format);
+        console.log('resultType: ' + response.data.data.resultType);
+        console.log('legendFormat: ' + transformerOptions.legendFormat);
+        // console.log(result);
         this.resultTransformer.transform(result, response, transformerOptions);
+        // console.log(result);
       });
 
       return { data: result };
@@ -233,6 +237,7 @@ export class PrometheusDatasource {
     if (start > end) {
       throw { message: 'Invalid time range' };
     }
+    // console.log(query.expr);
 
     var url = '/api/v1/query_range';
     var data = {

public/app/plugins/datasource/prometheus/result_transformer.ts

@@ -6,7 +6,9 @@ export class ResultTransformer {
 
   transform(result: any, response: any, options: any) {
     let prometheusResult = response.data.data.result;
-
+    console.log(prometheusResult);
+    // console.log(options);
+    // console.log(result);
     if (options.format === 'table') {
       result.push(this.transformMetricDataToTable(prometheusResult, options.responseListLength, options.refId));
     } else if (options.format === 'heatmap') {
@@ -26,6 +28,7 @@ export class ResultTransformer {
         }
       }
     }
+    // console.log(result);
   }
 
   transformMetricData(metricData, options, start, end) {
@@ -137,6 +140,7 @@ export class ResultTransformer {
     if (!label || label === '{}') {
       label = options.query;
     }
+    console.log(label);
     return label;
   }
 
@@ -156,6 +160,7 @@ export class ResultTransformer {
     var labelPart = _.map(_.toPairs(labelData), function(label) {
       return label[0] + '="' + label[1] + '"';
     }).join(',');
+    console.log(metricName);
     return metricName + '{' + labelPart + '}';
   }
 

public/app/plugins/datasource/prometheus/specs/_datasource.jest.ts

@@ -21,23 +21,7 @@ let backendSrv = <any>{
 };
 
 let templateSrv = {
-  replace: (target, scopedVars, format) => {
-    if (!target) {
-      return target;
-    }
-    let variable, value, fmt;
-
-    return target.replace(scopedVars, (match, var1, var2, fmt2, var3, fmt3) => {
-      variable = this.index[var1 || var2 || var3];
-      fmt = fmt2 || fmt3 || format;
-      if (scopedVars) {
-        value = scopedVars[var1 || var2 || var3];
-        if (value) {
-          return this.formatValue(value.value, fmt, variable);
-        }
-      }
-    });
-  },
+  replace: jest.fn(str => str),
 };
 
 let timeSrv = {
@@ -63,10 +47,7 @@ describe('PrometheusDatasource', function() {
   //     })
   //   );
 
-  beforeEach(() => {
-    ctx.ds = new PrometheusDatasource(instanceSettings, $q, <any>backendSrv, templateSrv, timeSrv);
-  });
-  describe('When querying prometheus with one target using query editor target spec', function() {
+  describe('When querying prometheus with one target using query editor target spec', async () => {
     var results;
     var query = {
       range: { from: time({ seconds: 63 }), to: time({ seconds: 183 }) },
@@ -106,7 +87,7 @@ describe('PrometheusDatasource', function() {
       expect(res.method).toBe('GET');
       expect(res.url).toBe(urlExpected);
     });
-    it('should return series list', function() {
+    it('should return series list', async () => {
       expect(results.data.length).toBe(1);
       expect(results.data[0].target).toBe('test{job="testjob"}');
     });