Fix #67 (or, fix via databind, but add release notes, tests)

Author: cowtowncoder

parameter-names/src/test/java/com/fasterxml/jackson/module/paramnames/DelegatingCreatorTest.java

@@ -12,7 +12,7 @@
 
 import static org.assertj.core.api.BDDAssertions.*;
 
-public class DelegatingCreatorTest
+public class DelegatingCreatorTest extends ModuleTestBase
 {
     static class ClassWithDelegatingCreator {
         private final String value;
@@ -55,44 +55,38 @@ public T getValue() {
         }
    }
 
-    
-	@Test
-	public void shouldNotOverrideJsonCreatorAnnotationWithSpecifiedMode() throws IOException {
-
-		// given
-		ObjectMapper objectMapper = new ObjectMapper();
-		objectMapper.registerModule(new ParameterNamesModule(JsonCreator.Mode.PROPERTIES));
-
-		// when
-		ClassWithDelegatingCreator actual = objectMapper.readValue("{\"value\":\"aValue\"}",
-		        ClassWithDelegatingCreator.class);
-
-		// then
-		Map<String, String> props = new HashMap<>();
-		props.put("value", "aValue");
-		ClassWithDelegatingCreator expected = new ClassWithDelegatingCreator(props);
-		then(actual).isEqualToComparingFieldByField(expected);
-	}
-
-	@Test
-	public void shouldDeserializeIntWrapper() throws Exception {
-		ObjectMapper mapper = new ObjectMapper();
-
-		mapper.registerModule(new ParameterNamesModule());
-
-		IntWrapper actual = mapper.readValue
-				("{\"value\":13}", IntWrapper.class);
-		then(actual).isEqualToComparingFieldByField(new IntWrapper(13));
-	}
-
-	@Test
-	public void shouldDeserializeGenericWrapper() throws Exception {
-		ObjectMapper mapper = new ObjectMapper();
-
-		mapper.registerModule(new ParameterNamesModule());
-
-		GenericWrapper<String> actual = mapper.readValue
-				("{\"value\":\"aValue\"}", new TypeReference<GenericWrapper<String>>() { });
-		then(actual).isEqualToComparingFieldByField(new GenericWrapper<>("aValue"));
-	}
+   @Test
+   public void shouldNotOverrideJsonCreatorAnnotationWithSpecifiedMode() throws IOException {
+        // given
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.registerModule(new ParameterNamesModule(JsonCreator.Mode.PROPERTIES));
+
+        // when
+        ClassWithDelegatingCreator actual = objectMapper.readValue("{\"value\":\"aValue\"}",
+                ClassWithDelegatingCreator.class);
+
+        // then
+        Map<String, String> props = new HashMap<>();
+        props.put("value", "aValue");
+        ClassWithDelegatingCreator expected = new ClassWithDelegatingCreator(props);
+        then(actual).isEqualToComparingFieldByField(expected);
+    }
+
+    @Test
+    public void shouldDeserializeIntWrapper() throws Exception {
+        ObjectMapper mapper = newMapper();
+
+        IntWrapper actual = mapper.readValue
+                ("{\"value\":13}", IntWrapper.class);
+        then(actual).isEqualToComparingFieldByField(new IntWrapper(13));
+    }
+
+    @Test
+    public void shouldDeserializeGenericWrapper() throws Exception {
+        ObjectMapper mapper = newMapper();
+
+        GenericWrapper<String> actual = mapper.readValue
+                ("{\"value\":\"aValue\"}", new TypeReference<GenericWrapper<String>>() { });
+        then(actual).isEqualToComparingFieldByField(new GenericWrapper<>("aValue"));
+    }
 }

parameter-names/src/test/java/com/fasterxml/jackson/module/paramnames/ModuleTestBase.java

@@ -0,0 +1,34 @@
+package com.fasterxml.jackson.module.paramnames;
+
+import java.util.Arrays;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class ModuleTestBase
+{
+    protected static ObjectMapper newMapper() {
+        return new ObjectMapper()
+                .registerModule(new ParameterNamesModule());
+    }
+
+    protected String quote(String value) {
+        return "\"" + value + "\"";
+    }
+
+    protected String aposToQuotes(String json) {
+        return json.replace("'", "\"");
+    }
+
+    protected void verifyException(Throwable e, String... matches)
+    {
+        String msg = e.getMessage();
+        String lmsg = (msg == null) ? "" : msg.toLowerCase();
+        for (String match : matches) {
+            String lmatch = match.toLowerCase();
+            if (lmsg.indexOf(lmatch) >= 0) {
+                return;
+            }
+        }
+        throw new Error("Expected an exception with one of substrings ("+Arrays.asList(matches)+"): got one with message \""+msg+"\"");
+    }
+}

parameter-names/src/test/java/com/fasterxml/jackson/module/paramnames/NamingStrategy67Test.java

@@ -0,0 +1,58 @@
+package com.fasterxml.jackson.module.paramnames;
+
+import static org.assertj.core.api.BDDAssertions.then;
+
+import org.junit.Test;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+
+public class NamingStrategy67Test extends ModuleTestBase
+{
+    static class ClassWithOneProperty {
+        public final String firstProperty;
+
+        @JsonCreator
+//       @JsonCreator(mode = JsonCreator.Mode.PROPERTIES)
+        public ClassWithOneProperty(String firstProperty) {
+             this.firstProperty = "CTOR:"+firstProperty;
+        }
+   }
+    static class ClassWithTwoProperties {
+        public final int a;
+        public final int b;
+
+        private ClassWithTwoProperties(@JsonProperty("a") int a, @JsonProperty("b") int b) {
+            this.a = a+1;
+            this.b = b+1;
+        }
+    }
+
+    @Test
+    public void testSnakeCaseNaming() throws Exception
+    {
+        ObjectMapper mapper = newMapper()
+                .setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE)
+                ;
+        final String MSG = "1st";
+        ClassWithOneProperty actual = mapper.readValue(
+//                "\""+MSG+"\"",
+                "{\"first_property\":\""+MSG+"\"}",
+//                "{\"firstProperty\":\""+MSG+"\"}",
+                ClassWithOneProperty.class);
+        then(actual).isEqualToComparingFieldByField(new ClassWithOneProperty(MSG));
+    }
+
+    @Test
+    public void testPrivateConstructorWithPropertyAnnotations() throws Exception
+    {
+        ObjectMapper mapper = newMapper()
+                .setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
+        ClassWithTwoProperties actual = mapper.readValue("{\"a\":1, \"b\": 2}",
+                ClassWithTwoProperties.class);
+
+        then(actual).isEqualToComparingFieldByField(new ClassWithTwoProperties(1, 2));
+    }
+}

pom.xml

@@ -3,7 +3,7 @@
   <parent>
     <groupId>com.fasterxml.jackson</groupId>
     <artifactId>jackson-base</artifactId>
-    <version>2.9.5</version>
+    <version>2.9.6-SNAPSHOT</version>
   </parent>
   <groupId>com.fasterxml.jackson.module</groupId>
   <artifactId>jackson-modules-java8</artifactId>

release-notes/CREDITS

@@ -32,3 +32,7 @@ Semyon Levin (remal@github)
   #65: Use `DeserializationContext.handleWeirdXxxValue()` for datetime deserializers
    (2.9.6)
 
+Sonny Gill (sonnygill@github)
+  #67: `ParameterNamesModule` does not deserialize with a single parameter
+    constructor when using `SnakeCase` `PropertyNamingStrategy`
+   (2.9.6)

release-notes/VERSION

@@ -12,6 +12,9 @@ Modules:
 
 #65: Use `DeserializationContext.handleWeirdXxxValue()` for datetime deserializers
  (contributed by Semyon L)
+#67: `ParameterNamesModule` does not deserialize with a single parameter
+   constructor when using `SnakeCase` `PropertyNamingStrategy`
+ (reported by Sonny G)
 
 2.9.5 (26-Mar-2018)