Add failing test for #116

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/dataformat/csv/failing/NullWriting116Test.java

@@ -0,0 +1,40 @@
+package com.fasterxml.jackson.dataformat.csv.failing;
+
+import java.io.StringWriter;
+
+import com.fasterxml.jackson.databind.*;
+
+import com.fasterxml.jackson.dataformat.csv.*;
+
+public class NullWriting116Test extends ModuleTestBase
+{
+    private final CsvMapper csv = new CsvMapper();
+
+    // [dataformat#116]
+    public void testWithObjectArray() throws Exception 
+    {
+        CsvSchema schema = CsvSchema.builder()
+                                    .addColumn("a", CsvSchema.ColumnType.NUMBER)
+                                    .addColumn("b", CsvSchema.ColumnType.NUMBER)
+                                    .setUseHeader(true)
+                                    .build();
+        ObjectWriter writer = csv.writer(schema);
+        StringWriter out = new StringWriter();
+        SequenceWriter sequence = writer.writeValues(out);
+
+        sequence.write(new Object[]{ 1, 2 });
+//        sequence.write(new Object[]{ null, 2 });
+        sequence.write(new Object[]{ null, null });
+        sequence.write(new Object[]{ 1, null });
+
+        sequence.close();
+
+//System.err.println("CSV:\n"+out);
+        assertEquals("a,b\n" +
+                     "1,2\n" +
+//                     ",2\n" +
+                     ",\n" +
+                     "1,\n", out.toString());
+    }
+
+}

src/test/java/com/fasterxml/jackson/dataformat/csv/ser/ArrayWriteTest.java

@@ -36,21 +36,21 @@ static class Pojo90 {
     /**********************************************************************
      */
 
+    private final CsvMapper MAPPER = mapperForCsv();
+    
     public void testSimpleExplicit() throws Exception
     {
-        CsvMapper mapper = mapperForCsv();
         ValueEntry input = new ValueEntry("foo", "stuff", 1, 2, 3);
-        String csv = mapper.writerWithSchemaFor(ValueEntry.class)
+        String csv = MAPPER.writerWithSchemaFor(ValueEntry.class)
                 .writeValueAsString(input)
                 .trim();
         assertEquals("foo,1;2;3,stuff", csv);
     }
 
     public void testSeparatorOverride() throws Exception
     {
-        CsvMapper mapper = mapperForCsv();
         ValueEntry input = new ValueEntry("foo", "stuff", 1, 2, 3);
-        String csv = mapper.writer(CsvSchema.builder()
+        String csv = MAPPER.writer(CsvSchema.builder()
                 .addColumn("id")
                 .addArrayColumn("values", " ")
                 .addColumn("extra")
@@ -64,8 +64,7 @@ public void testSeparatorOverride() throws Exception
     public void testArraysWithNulls() throws Exception
     {
         Pojo90 value = new Pojo90();
-        CsvMapper mapper = mapperForCsv();
-        String csvContent = mapper.writer(mapper.schemaFor(Pojo90.class)
+        String csvContent = MAPPER.writer(MAPPER.schemaFor(Pojo90.class)
                 .withHeader())
                 .writeValueAsString(value);
         String[] lines = csvContent.split("\\n");