Dropping test database automatically

Author: gionatamettifogo

.env.example

@@ -2,5 +2,5 @@
 # chinook database is used in non-destructive tests
 CHINOOK_DATABASE_URL="sqlitecloud://user:password@xxx.sqlite.cloud:8860/chinook.db"
 
-# testing database is used in destructive tests
+# testing databases are also created automatically as testing-xxx.db and used in destructive tests
 TESTING_DATABASE_URL="sqlitecloud://user:password@xxx.sqlite.cloud:8860/testing.db"

test/connection.test.ts

@@ -13,12 +13,16 @@ import {
   getChinookConnection,
   WARN_SPEED_MS,
   EXPECT_SPEED_MS,
-  EXTRA_LONG_TIMEOUT
+  clearTestingDatabasesAsync
 } from './shared'
 
 describe('connection', () => {
   let chinook: SQLiteCloudConnection
 
+  beforeAll(async () => {
+    await clearTestingDatabasesAsync()
+  })
+
   beforeEach(() => {
     chinook = getChinookConnection()
   })

test/shared.ts

@@ -145,6 +145,26 @@ export async function getTestingDatabaseAsync(): Promise<Database> {
   return database
 }
 
+/** Drop databases that are no longer in use */
+export async function clearTestingDatabasesAsync() {
+  const chinook = getChinookDatabase()
+
+  let numDeleted = 0
+  let databases = await chinook.sql`LIST DATABASES;`
+  const testingPattern = /^testing-\d{16}\.db$/
+  for (let i = 0; i < databases.length; i++) {
+    const databaseName = databases[i]['name']
+    if (testingPattern.test(databaseName)) {
+      const result = await chinook.sql`REMOVE DATABASE ${databaseName};`
+      console.assert(result)
+      numDeleted++
+    }
+  }
+  if (numDeleted > 0) {
+    console.log(`Deleted ${numDeleted} testing databases`)
+  }
+}
+
 //
 // more utilities
 //