prometheus: datasource refactor

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

@@ -0,0 +1,78 @@
+import { ResultTransformer } from '../result_transformer';
+
+describe('Prometheus Result Transformer', () => {
+  let ctx: any = {};
+
+  beforeEach(() => {
+    ctx.templateSrv = {
+      replace: str => str,
+    };
+    ctx.resultTransformer = new ResultTransformer(ctx.templateSrv);
+  });
+
+  describe('When resultFormat is table', () => {
+    var response = {
+      status: 'success',
+      data: {
+        resultType: 'matrix',
+        result: [
+          {
+            metric: { __name__: 'test', job: 'testjob' },
+            values: [[1443454528, '3846']],
+          },
+          {
+            metric: {
+              __name__: 'test',
+              instance: 'localhost:8080',
+              job: 'otherjob',
+            },
+            values: [[1443454529, '3847']],
+          },
+        ],
+      },
+    };
+
+    it('should return table model', () => {
+      var table = ctx.resultTransformer.transformMetricDataToTable(response.data.result);
+      expect(table.type).toBe('table');
+      expect(table.rows).toEqual([
+        [1443454528000, 'test', '', 'testjob', 3846],
+        [1443454529000, 'test', 'localhost:8080', 'otherjob', 3847],
+      ]);
+      expect(table.columns).toEqual([
+        { text: 'Time', type: 'time' },
+        { text: '__name__' },
+        { text: 'instance' },
+        { text: 'job' },
+        { text: 'Value' },
+      ]);
+    });
+  });
+
+  describe('When resultFormat is table and instant = true', () => {
+    var response = {
+      status: 'success',
+      data: {
+        resultType: 'vector',
+        result: [
+          {
+            metric: { __name__: 'test', job: 'testjob' },
+            value: [1443454528, '3846'],
+          },
+        ],
+      },
+    };
+
+    it('should return table model', () => {
+      var table = ctx.resultTransformer.transformMetricDataToTable(response.data.result);
+      expect(table.type).toBe('table');
+      expect(table.rows).toEqual([[1443454528000, 'test', 'testjob', 3846]]);
+      expect(table.columns).toEqual([
+        { text: 'Time', type: 'time' },
+        { text: '__name__' },
+        { text: 'job' },
+        { text: 'Value' },
+      ]);
+    });
+  });
+});