add test coverage for log processing

Summary: as per title

Reviewed By: passy

Differential Revision: D13376522

fbshipit-source-id: 4746d3234a13abdf81a23387e57d877714c94b44

src/plugins/logs/__tests__/index.node.js

@@ -0,0 +1,58 @@
+/**
+ * Copyright 2018-present Facebook.
+ * 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';
+
+const entry = {
+  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 currentState = addEntriesToState([processEntry(entry, 'key1')]);
+  const processedEntry = processEntry(
+    {
+      ...entry,
+      message: 'new message',
+    },
+    'key2',
+  );
+  const newState = addEntriesToState([processedEntry], currentState);
+  expect(newState.rows.length).toBe(2);
+  expect(newState.entries.length).toBe(2);
+});
+
+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);
+});