From 5e5ff2710977524c766701f52540f43d9cfebc19 Mon Sep 17 00:00:00 2001
From: Josh Cummings <josh.cummings@gmail.com>
Date: Thu, 11 Feb 2021 18:54:34 -0700
Subject: [PATCH] Configure Jackson for nanosecond precision

Closes gh-9461
---
 .../client/jackson2/OAuth2AuthenticationTokenMixinTests.java  | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/jackson2/OAuth2AuthenticationTokenMixinTests.java b/oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/jackson2/OAuth2AuthenticationTokenMixinTests.java
index e394254109..40afdc9343 100644
--- a/oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/jackson2/OAuth2AuthenticationTokenMixinTests.java
+++ b/oauth2/oauth2-client/src/test/java/org/springframework/security/oauth2/client/jackson2/OAuth2AuthenticationTokenMixinTests.java
@@ -24,6 +24,7 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.datatype.jsr310.DecimalUtils;
 import org.junit.Before;
@@ -64,6 +65,9 @@ public class OAuth2AuthenticationTokenMixinTests {
 		ClassLoader loader = getClass().getClassLoader();
 		this.mapper = new ObjectMapper();
 		this.mapper.registerModules(SecurityJackson2Modules.getModules(loader));
+
+		// see https://github.com/FasterXML/jackson-databind/issues/3052 for details
+		this.mapper.configure(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS, true);
 	}
 
 	@Test