Fix #4435 (or rather, mark as fixed; fix via jackson-core) (#4446)

Author: cowtowncoder

release-notes/VERSION-2.x

@@ -12,7 +12,11 @@ Project: jackson-databind
 
 #4428: `ByteBuddy` scope went beyond `test` in version 2.17.0
  (reported by Miguel M-R)
- (fix contributed by Joo-Hyuk K)
+ (fix by Joo-Hyuk K)
+#4435: Cannot deserialize value of type `java.math.BigDecimal` from
+  String ".05": not a valid representation
+ (reported by @EAlf91)
+ (fix by @pjfanning)
 
 2.17.0 (12-Mar-2024)
 
@@ -99,7 +103,7 @@ Project: jackson-databind
 
 #1770: Incorrect deserialization for `BigDecimal` numbers
  (reported by @cristian-mocanu-mob)
- (fix contributed by @pjfanning)
+ (fix by @pjfanning)
 #2502: Add a way to configure caches Jackson uses
  (contributed by Joo-Hyuk K)
 #2787: Mix-ins do not work for `Enum`s

src/test/java/com/fasterxml/jackson/databind/deser/jdk/BigDecimalDeser4435Test.java

@@ -1,4 +1,4 @@
-package com.fasterxml.jackson.databind.deser;
+package com.fasterxml.jackson.databind.deser.jdk;
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
@@ -11,15 +11,14 @@
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.json.JsonMapper;
-import com.fasterxml.jackson.databind.testutil.DatabindTestUtil.DoubleWrapper;
+import com.fasterxml.jackson.databind.testutil.DatabindTestUtil;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.fail;
 
-import static com.fasterxml.jackson.databind.testutil.DatabindTestUtil.newJsonMapper;
-import static com.fasterxml.jackson.databind.testutil.DatabindTestUtil.verifyException;
-
 public class BigNumbersDeserTest
+    extends DatabindTestUtil
 {
     static class BigIntegerWrapper {
         public BigInteger number;
@@ -31,7 +30,7 @@ static class BigDecimalWrapper {
 
     /*
     /**********************************************************
-    /* Tests
+    /* Test methods
     /**********************************************************
      */
 
@@ -103,6 +102,33 @@ public void testBigIntegerUnlimited() throws Exception
         assertNotNull(bdw);
     }
 
+    // [databind#4435]
+    @Test
+    public void testNumberStartingWithDot() throws Exception
+    {
+        String num = ".555555555555555555555555555555";
+        BigDecimalWrapper w = MAPPER.readValue("{\"number\":\"" + num + "\"}", BigDecimalWrapper.class);
+        assertEquals(new BigDecimal(num), w.number);
+    }
+
+    // [databind#4435]
+    @Test
+    public void testNumberStartingWithMinusDot() throws Exception
+    {
+        String num = "-.555555555555555555555555555555";
+        BigDecimalWrapper w = MAPPER.readValue("{\"number\":\"" + num + "\"}", BigDecimalWrapper.class);
+        assertEquals(new BigDecimal(num), w.number);
+    }
+
+    // [databind#4435]
+    @Test
+    public void testNumberStartingWithPlusDot() throws Exception
+    {
+        String num = "+.555555555555555555555555555555";
+        BigDecimalWrapper w = MAPPER.readValue("{\"number\":\"" + num + "\"}", BigDecimalWrapper.class);
+        assertEquals(new BigDecimal(num), w.number);
+    }
+
     private String generateJson(final String fieldName) {
         final int len = 1200;
         final StringBuilder sb = new StringBuilder();