🚧 WIP

example.ts

@@ -15,7 +15,7 @@ class User {
 function example(oe: OnEmitFn) {
 	let user = new User();
 
-	let scope = diary(oe, {pid: Deno.pid});
+	let scope = diary(oe, { pid: Deno.pid });
 
 	scope('log', 'this is a log message');
 	scope('info', 'this is an info message');
@@ -32,7 +32,7 @@ function example(oe: OnEmitFn) {
 	scope('info', 'this {user} exists', { user });
 	scope('info', 'we call that user {name} with {id}', user);
 
-    scope('info', 'we also have inherited props like {pid}');
+	scope('info', 'we also have inherited props like {pid}');
 }
 
 console.log('============ PRETTY ============\n');

migration.ts

@@ -21,7 +21,7 @@ let v5Events: any[] = [];
 {
 	const log = v5.diary((level, event, props) => {
 		v5Events.push({ name, level, messages: [event, props] });
-	}, {name: 'v0.5'});
+	}, { name: 'v0.5' });
 
 	log('debug', 'hello');
 	log('log', 'hello {phrase}', { phrase: 'world', extra: ['extra', 'props'] });

src/mod.test.ts

@@ -1,8 +1,8 @@
 import { assertInstanceOf } from '@std/assert';
 import { assertSpyCall, spy } from '@std/testing/mock';
 
-import * as lib from './mod.ts';
 import type { Level } from './mod.ts';
+import * as lib from './mod.ts';
 
 Deno.test('api', () => {
 	assertInstanceOf(lib.diary, Function);
@@ -69,3 +69,26 @@ Deno.test('should allow anything as prop value', () => {
 		args: ['info', 'hello {phrase}', { phrase: t }],
 	});
 });
+
+Deno.test('should allow merging of props', () => {
+	let emit = spy();
+	let log = lib.diary(emit, { foo: 'bar' });
+
+	log('info', 'hello {phrase}', { phrase: 'world' });
+	log('info', 'hello {foo}');
+	log('debug', 'hello {phrase} {foo}', { phrase: 'world' });
+
+	assertSpyCall(emit, 0, {
+		args: ['info', 'hello {phrase}', { phrase: 'world', foo: 'bar' }],
+	});
+	assertSpyCall(emit, 1, {
+		args: ['info', 'hello {foo}', { foo: 'bar' }],
+	});
+	assertSpyCall(emit, 2, {
+		args: [
+			'debug',
+			'hello {phrase} {foo}',
+			{ phrase: 'world', foo: 'bar' },
+		],
+	});
+});