chore: improve unit test error logging in waitUntil()

tests/internal-tests/src/__tests__/lib/lib.ts

@@ -7,15 +7,31 @@ export function waitTime(ms: number): Promise<void> {
  * Useful in unit-tests as a way to wait until a predicate is fulfilled.
  */
 export async function waitUntil(expectFcn: () => void, maxWaitTime: number): Promise<void> {
+	const previousErrors: string[] = []
+
 	const startTime = Date.now()
 	while (true) {
 		await waitTime(100)
 		try {
 			expectFcn()
 			return
 		} catch (err) {
+			const errorStr = `${err}`
+			if (previousErrors.length) {
+				const previousError = previousErrors[previousErrors.length - 1]
+				if (errorStr !== previousError) {
+					previousErrors.push(errorStr)
+				}
+			} else {
+				previousErrors.push(errorStr)
+			}
+
 			let waitedTime = Date.now() - startTime
-			if (waitedTime > maxWaitTime) throw err
+			if (waitedTime > maxWaitTime) {
+				console.log(`Previous errors: \n${previousErrors.join('\n')}`)
+
+				throw err
+			}
 			// else ignore error and try again later
 		}
 	}