Add unit testing

Install vitest, happy-dom, and @testing-library/vue
Add lib.ts and rbtree.ts tests in tests/
Modularise some date-range-managing code from App.vue into lib.ts

1 files changed, 5 insertions, 0 deletions

diff --git a/vite.config.ts b/vite.config.ts
index 6baaeb0..729378a 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,3 +1,4 @@
+/// <reference types="vitest" />
 import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
 
@@ -14,4 +15,8 @@ export default defineConfig({
 	build: {
 		sourcemap: true,
 	},
+	test: {
+		globals: true,
+		environment: 'happy-dom',
+	},
 })