From 5c43e361188fb23f36b1edce9845e10f9386c993 Mon Sep 17 00:00:00 2001
From: Joe Zhou <zhoushuqun@gmail.com>
Date: Tue, 4 Jun 2024 00:59:30 +0800
Subject: [PATCH] Make sure the contentType of detectCharset could be null.

---
 .../webmagic/utils/CharsetUtilsTest.java         | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 webmagic-core/src/test/java/us/codecraft/webmagic/utils/CharsetUtilsTest.java

diff --git a/webmagic-core/src/test/java/us/codecraft/webmagic/utils/CharsetUtilsTest.java b/webmagic-core/src/test/java/us/codecraft/webmagic/utils/CharsetUtilsTest.java
new file mode 100644
index 0000000..987a6f7
--- /dev/null
+++ b/webmagic-core/src/test/java/us/codecraft/webmagic/utils/CharsetUtilsTest.java
@@ -0,0 +1,16 @@
+package us.codecraft.webmagic.utils;
+
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import java.io.IOException;
+
+import org.junit.jupiter.api.Test;
+
+class CharsetUtilsTest {
+
+    @Test
+    void testDetectCharset() throws IOException {
+        assertNull(CharsetUtils.detectCharset(null, new byte[0]));
+    }
+
+}