From beca9c1f9e7b86ae108479bbe72fc9f0ad1165c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ivan=20=E2=80=9CCLOVIS=E2=80=9D=20Canet?=
 <ivan.canet@gmail.com>
Date: Mon, 6 Jul 2026 10:46:45 +0200
Subject: [PATCH] test: Dump collections when a test fails

---
 test/src/commonMain/kotlin/Utils.kt | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/test/src/commonMain/kotlin/Utils.kt b/test/src/commonMain/kotlin/Utils.kt
index 8fcdfcd3..40b2a947 100644
--- a/test/src/commonMain/kotlin/Utils.kt
+++ b/test/src/commonMain/kotlin/Utils.kt
@@ -18,6 +18,7 @@ package opensavvy.ktmongo.tests.api
 
 import opensavvy.ktmongo.api.MongoClient
 import opensavvy.prepared.suite.Prepared
+import opensavvy.prepared.suite.cleanUp
 import opensavvy.prepared.suite.prepared
 import opensavvy.prepared.suite.random.randomInt
 
@@ -26,7 +27,16 @@ val testId by randomInt(0, Int.MAX_VALUE)
 inline fun <reified Document : Any> Prepared<MongoClient>.collection(
 	prefix: String,
 ) = prepared {
-	this@collection()
+	val collection = this@collection()
 		.database("ktmongo-integration-tests")
 		.collection<Document>("$prefix-${testId()}")
+
+	cleanUp("Dump collection ${collection.fullyQualifiedName}", onSuccess = false) {
+		println("First 100 documents:")
+		collection.find(options = { limit(100) }, filter = {}).forEach {
+			println(" • $it")
+		}
+	}
+
+	collection
 }
-- 
2.51.2