MonthDeserTest: Test deserializing java.time.Month

Author: kreiger

datetime/src/test/java/com/fasterxml/jackson/datatype/jsr310/deser/MonthDeserTest.java

@@ -0,0 +1,160 @@
+package com.fasterxml.jackson.datatype.jsr310.deser;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectReader;
+import com.fasterxml.jackson.databind.exc.MismatchedInputException;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.fasterxml.jackson.datatype.jsr310.MockObjectConfiguration;
+import com.fasterxml.jackson.datatype.jsr310.ModuleTestBase;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.time.Month;
+import java.time.format.DateTimeParseException;
+import java.time.temporal.TemporalAccessor;
+import java.util.Map;
+
+import static org.junit.Assert.*;
+
+public class MonthDeserTest extends ModuleTestBase
+{
+    private final ObjectMapper MAPPER = newMapper();
+    private final ObjectReader READER = MAPPER.readerFor(Month.class);
+    private final TypeReference<Map<String, Month>> MAP_TYPE_REF = new TypeReference<Map<String, Month>>() { };
+
+    static class Wrapper {
+        @JsonFormat(pattern="MM")
+        public Month value;
+
+        public Wrapper(Month v) { value = v; }
+        public Wrapper() { }
+    }
+
+    @Test
+    public void testDeserializationAsString01() throws Exception
+    {
+        expectSuccess(Month.of(1), "'01'");
+    }
+
+    @Test
+    public void testDeserializationAsString02() throws Exception
+    {
+        expectSuccess(Month.of(1), "'JANUARY'");
+    }
+
+    @Test
+    public void testBadDeserializationAsString01() throws Throwable
+    {
+        expectFailure("'notamonth'");
+    }
+
+    @Test
+    public void testDeserialization01() throws Exception
+    {
+        assertEquals("The value is not correct.", Month.of(1),
+                MAPPER.readValue("\"01\"", Month.class));
+    }
+
+    @Test
+    public void testDeserialization02() throws Exception
+    {
+        assertEquals("The value is not correct.", Month.of(8),
+                MAPPER.readValue("\"08\"", Month.class));
+    }
+
+    @Test
+    public void testDeserializationWithTypeInfo01() throws Exception
+    {
+        final ObjectMapper mapper = new ObjectMapper()
+            .registerModule(new JavaTimeModule());
+        mapper.addMixIn(TemporalAccessor.class, MockObjectConfiguration.class);
+
+        Month month = Month.of(11);
+        TemporalAccessor value = mapper.readValue("[\"" + Month.class.getName() + "\",\"11\"]", TemporalAccessor.class);
+        assertEquals("The value is not correct.", month, value);
+    }
+
+    @Test
+    public void testFormatAnnotation() throws Exception
+    {
+        final Wrapper input = new Wrapper(Month.of(12));
+        String json = MAPPER.writeValueAsString(input);
+        assertEquals("{\"value\":\"12\"}", json);
+
+        Wrapper output = MAPPER.readValue(json, Wrapper.class);
+        assertEquals(input.value, output.value);
+    }
+
+    /*
+    /**********************************************************
+    /* Tests for empty string handling
+    /**********************************************************
+     */
+
+    // minor changes in 2.12
+    @Test
+    public void testDeserializeFromEmptyString() throws Exception
+    {
+        final String key = "month";
+
+        // First: by default, lenient, so empty String fine
+        final ObjectReader objectReader = MAPPER.readerFor(MAP_TYPE_REF);
+
+        String doc = MAPPER.writeValueAsString(asMap(key, null));
+        Map<String, Month> actualMapFromNullStr = objectReader.readValue(doc);
+        assertNull(actualMapFromNullStr.get(key));
+
+        doc = MAPPER.writeValueAsString(asMap(key, ""));
+        assertNotNull(objectReader.readValue(doc));
+
+        // But can make strict:
+        final ObjectMapper strictMapper = mapperBuilder().build();
+        strictMapper.configOverride(Month.class)
+                .setFormat(JsonFormat.Value.forLeniency(false));
+        doc = strictMapper.writeValueAsString(asMap("date", ""));
+        try {
+            strictMapper.readerFor(MAP_TYPE_REF)
+                    .readValue(doc);
+            fail("Should not pass");
+        } catch (MismatchedInputException e) {
+            verifyException(e, "not allowed because 'strict' mode set for");
+        }
+    }
+
+    private void expectFailure(String aposJson) throws Throwable {
+        try {
+            read(aposJson);
+            fail("expected DateTimeParseException");
+        } catch (JsonProcessingException e) {
+            if (e.getCause() == null) {
+                throw e;
+            }
+            if (!(e.getCause() instanceof DateTimeParseException)) {
+                throw e.getCause();
+            }
+        } catch (IOException e) {
+            throw e;
+        }
+    }
+
+    private void expectSuccess(Object exp, String aposJson) throws IOException {
+        final Month value = read(aposJson);
+        notNull(value);
+        expect(exp, value);
+    }
+
+    private Month read(final String aposJson) throws IOException {
+        return READER.readValue(a2q(aposJson));
+    }
+
+    private static void notNull(Object value) {
+        assertNotNull("The value should not be null.", value);
+    }
+
+    private static void expect(Object exp, Object value) {
+        assertEquals("The value is not correct.", exp,  value);
+    }
+}