Add Unit Test for Log Adding Logic

Summary: D22047276 introduced a new way to adding log data column depending on how one sorts by time. This diff adds unit test to test the logic

Reviewed By: passy

Differential Revision: D22068114

fbshipit-source-id: 3fe01beec69d45d96f2fc2a437c3f408686565a3

desktop/plugins/logs/__tests__/index.node.ts

@@ -0,0 +1,85 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {addEntriesToState, processEntry} from '../index';
+import {DeviceLogEntry} from 'flipper';
+
+const entry: DeviceLogEntry = {
+  tag: 'OpenGLRenderer',
+  pid: 18384,
+  tid: 18409,
+  message: 'Swap behavior 1',
+  date: new Date('Feb 28 2013 19:00:00 EST'),
+  type: 'debug',
+};
+
+test('processEntry', () => {
+  const key = 'key';
+  const processedEntry = processEntry(entry, key);
+  expect(processedEntry.entry).toEqual(entry);
+  expect(processedEntry.row.key).toBe(key);
+  expect(typeof processedEntry.row.height).toBe('number');
+});
+
+test('addEntriesToState without current state', () => {
+  const processedEntry = processEntry(entry, 'key');
+  const newState = addEntriesToState([processedEntry]);
+
+  expect(newState.rows.length).toBe(1);
+  expect(newState.entries.length).toBe(1);
+  expect(newState.entries[0]).toEqual(processedEntry);
+});
+
+test('addEntriesToState with current state', () => {
+  const firstProcessedEntry = processEntry(entry, 'key1');
+  const currentState = addEntriesToState([firstProcessedEntry]);
+  const secondProcessedEntry = processEntry(
+    {
+      ...entry,
+      message: 'new message',
+    },
+    'key2',
+  );
+  const newState = addEntriesToState([secondProcessedEntry], currentState);
+  expect(newState.entries.length).toBe(2);
+  expect(newState.rows.length).toBe(2);
+  expect(newState.rows[0]).toEqual(firstProcessedEntry.row);
+  expect(newState.rows[1]).toEqual(secondProcessedEntry.row);
+});
+
+test('addEntriesToState increase counter on duplicate message', () => {
+  const currentState = addEntriesToState([processEntry(entry, 'key1')]);
+  const processedEntry = processEntry(entry, 'key2');
+  const newState = addEntriesToState([processedEntry], currentState);
+  expect(newState.rows.length).toBe(1);
+  expect(newState.entries.length).toBe(2);
+  expect(newState.rows[0].columns.type.value.props.children).toBe(2);
+});
+
+test('addEntriesToState with reversed direction (add to front)', () => {
+  const firstProcessedEntry = processEntry(entry, 'key1');
+  const currentState = addEntriesToState([firstProcessedEntry]);
+  expect(currentState.rows.length).toBe(1);
+  expect(currentState.entries.length).toBe(1);
+  const secondProcessedEntry = processEntry(
+    {
+      ...entry,
+      message: 'second message',
+      date: new Date('Feb 28 2013 19:01:00 EST'),
+    },
+    'key2',
+  );
+  const newState = addEntriesToState(
+    [secondProcessedEntry],
+    currentState,
+    'down',
+  );
+  expect(newState.entries.length).toBe(2);
+  expect(newState.rows.length).toBe(2);
+});