grafana/data: Reorganise code (#19136)

* Organise data frame and vectors code * Organise transformations * Move dataframe utils to dataframe dir * Organise datetime utils * Organise text utils * Organise logs utils * Revert "Organise logs utils" This reverts commit c24115c755. * registry -> Registry * Transformations reorg
2019-09-17 08:23:47 +02:00
parent 330cd597ec
commit 5c0f424d1b
76 changed files with 813 additions and 768 deletions
@@ -0,0 +1,66 @@
+import { DataFrameDTO, FieldType } from '../types/dataFrame';
+import { MutableDataFrame } from './MutableDataFrame';
+
+describe('Reversing DataFrame', () => {
+  describe('when called with a DataFrame', () => {
+    it('then it should reverse the order of values in all fields', () => {
+      const frame: DataFrameDTO = {
+        fields: [
+          { name: 'time', type: FieldType.time, values: [100, 200, 300] },
+          { name: 'name', type: FieldType.string, values: ['a', 'b', 'c'] },
+          { name: 'value', type: FieldType.number, values: [1, 2, 3] },
+        ],
+      };
+
+      const helper = new MutableDataFrame(frame);
+
+      expect(helper.values.time.toArray()).toEqual([100, 200, 300]);
+      expect(helper.values.name.toArray()).toEqual(['a', 'b', 'c']);
+      expect(helper.values.value.toArray()).toEqual([1, 2, 3]);
+
+      helper.reverse();
+
+      expect(helper.values.time.toArray()).toEqual([300, 200, 100]);
+      expect(helper.values.name.toArray()).toEqual(['c', 'b', 'a']);
+      expect(helper.values.value.toArray()).toEqual([3, 2, 1]);
+    });
+  });
+});
+
+describe('Apending DataFrame', () => {
+  it('Should append values', () => {
+    const dto: DataFrameDTO = {
+      fields: [
+        { name: 'time', type: FieldType.time, values: [100] },
+        { name: 'name', type: FieldType.string, values: ['a', 'b'] },
+        { name: 'value', type: FieldType.number, values: [1, 2, 3] },
+      ],
+    };
+
+    const frame = new MutableDataFrame(dto);
+    expect(frame.values.time.toArray()).toEqual([100, null, null]);
+
+    // Set a value on the second row
+    frame.set(1, { time: 200, name: 'BB', value: 20 });
+    expect(frame.toArray()).toEqual([
+      { time: 100, name: 'a', value: 1 }, // 1
+      { time: 200, name: 'BB', value: 20 }, // 2
+      { time: null, name: null, value: 3 }, // 3
+    ]);
+
+    // Set a value on the second row
+    frame.add({ value2: 'XXX' }, true);
+    expect(frame.toArray()).toEqual([
+      { time: 100, name: 'a', value: 1, value2: null }, // 1
+      { time: 200, name: 'BB', value: 20, value2: null }, // 2
+      { time: null, name: null, value: 3, value2: null }, // 3
+      { time: null, name: null, value: null, value2: 'XXX' }, // 4
+    ]);
+
+    // Make sure length survives a spread operator
+    const keys = Object.keys(frame);
+    const copy = { ...frame } as any;
+    expect(keys).toContain('length');
+    expect(copy.length).toEqual(frame.length);
+  });
+});