From 4b51c4f92d7efd0c75abfd45abd701ebb930532a 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: Tue, 30 Dec 2025 22:35:05 +0100
Subject: [PATCH] test(bson): Use KotlinX.Serialization in the :bson-official
 tests

---
 bson-official/build.gradle.kts                |   3 +
 .../SerializationOptionsCompatibility.kt      | 109 ++++++++++++++++++
 2 files changed, 112 insertions(+)
 create mode 100644 bson-official/src/jvmTest/kotlin/SerializationOptionsCompatibility.kt

diff --git a/bson-official/build.gradle.kts b/bson-official/build.gradle.kts
index c9a154ef..dba97ed5 100644
--- a/bson-official/build.gradle.kts
+++ b/bson-official/build.gradle.kts
@@ -17,6 +17,7 @@
 plugins {
 	alias(opensavvyConventions.plugins.base)
 	alias(opensavvyConventions.plugins.kotlin.library)
+	alias(libsCommon.plugins.kotlinx.serialization)
 	alias(libsCommon.plugins.testBalloon)
 }
 
@@ -42,6 +43,8 @@ kotlin {
 
 	sourceSets.jvmTest.dependencies {
 		implementation(libs.mongodb.sync.jvm)
+		implementation(libs.mongodb.kotlinx.serialization)
+		implementation(libs.kotlinx.serialization)
 	}
 }
 
diff --git a/bson-official/src/jvmTest/kotlin/SerializationOptionsCompatibility.kt b/bson-official/src/jvmTest/kotlin/SerializationOptionsCompatibility.kt
new file mode 100644
index 00000000..8ac16258
--- /dev/null
+++ b/bson-official/src/jvmTest/kotlin/SerializationOptionsCompatibility.kt
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2025-2026, OpenSavvy and contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@file:OptIn(ExperimentalTime::class, ExperimentalUuidApi::class, LowLevelApi::class, ExperimentalBsonDiffApi::class)
+
+package opensavvy.ktmongo.bson.official
+
+import kotlinx.serialization.Contextual
+import kotlinx.serialization.Serializable
+import opensavvy.ktmongo.bson.ExperimentalBsonDiffApi
+import opensavvy.ktmongo.bson.diff
+import opensavvy.ktmongo.bson.read
+import opensavvy.ktmongo.bson.write
+import opensavvy.ktmongo.dsl.LowLevelApi
+import opensavvy.prepared.runner.testballoon.preparedSuite
+import opensavvy.prepared.suite.prepared
+import kotlin.io.encoding.Base64
+import kotlin.time.ExperimentalTime
+import kotlin.uuid.ExperimentalUuidApi
+import kotlin.uuid.Uuid
+
+// Not annotated with @Serializable: can only be serialized with :bson-kotlin
+data class SerializableWithDataClass(
+	val a: String,
+	val b: org.bson.types.ObjectId,
+	val c: opensavvy.ktmongo.bson.types.ObjectId,
+	val d: Uuid,
+)
+
+// Not a data class: can only be serialized with :bson-kotlinx
+@Serializable
+class SerializableWithKxS(
+	val a: String,
+	val b: @Contextual org.bson.types.ObjectId,
+	val c: opensavvy.ktmongo.bson.types.ObjectId,
+	val d: Uuid,
+)
+
+val SerializationOptionsCompatibility by preparedSuite {
+
+	val expectedBson by prepared {
+		testContext().buildDocument {
+			writeString("a", "Bob")
+			writeObjectId("b", opensavvy.ktmongo.bson.types.ObjectId("640180000000000000000000"))
+			writeObjectId("c", opensavvy.ktmongo.bson.types.ObjectId("640180000000000000000000"))
+			writeBinaryData("d", 0x4u, Base64.decode("c//SZESzTGmQ6OfR38A11A=="))
+		}
+	}
+
+	val valueDataClass by prepared {
+		SerializableWithDataClass(
+			a = "Bob",
+			b = org.bson.types.ObjectId("640180000000000000000000"),
+			c = opensavvy.ktmongo.bson.types.ObjectId("640180000000000000000000"),
+			d = Uuid.parse("73ffd264-44b3-4c69-90e8-e7d1dfc035d4"),
+		)
+	}
+
+	val valueKxS by prepared {
+		SerializableWithKxS(
+			a = "Bob",
+			b = org.bson.types.ObjectId("640180000000000000000000"),
+			c = opensavvy.ktmongo.bson.types.ObjectId("640180000000000000000000"),
+			d = Uuid.parse("73ffd264-44b3-4c69-90e8-e7d1dfc035d4"),
+		)
+	}
+
+	val valueDataClassBson by prepared {
+		testContext().write(valueDataClass())
+	}
+
+	val valueKxSBson by prepared {
+		testContext().write(valueKxS())
+	}
+
+	test("Compare :bson-kotlin to baseline") {
+		check(valueDataClassBson() == expectedBson()) { "Diff:\n${valueDataClassBson() diff expectedBson()}" }
+	}
+
+	test("Compare :bson-kotlinx to baseline") {
+		check(valueKxSBson() == expectedBson()) { "Diff:\n${valueKxSBson() diff expectedBson()}" }
+	}
+
+	test("Compare :bson-kotlin to :bson-kotlinx") {
+		check(valueDataClassBson() == valueKxSBson()) { "Diff:\n${valueDataClassBson() diff valueKxSBson()}" }
+	}
+
+	test("Round-trip from :bson-kotlin to :bson-kotlinx") {
+		check(valueDataClassBson().read<SerializableWithKxS>() == valueKxS())
+	}
+
+	test("Round-trip from :bson-kotlinx to :bson-kotlin") {
+		check(valueKxSBson().read<SerializableWithDataClass>() == valueDataClass())
+	}
+
+}
-- 
2.51.2