Add failing test for #10

Author: cowtowncoder

csv/src/test/java/com/fasterxml/jackson/dataformat/csv/failing/MissingNullsOnObjectArrayWrite10Test.java

@@ -0,0 +1,39 @@
+package com.fasterxml.jackson.dataformat.csv.failing;
+
+import java.io.StringWriter;
+
+import com.fasterxml.jackson.databind.ObjectWriter;
+import com.fasterxml.jackson.databind.SequenceWriter;
+import com.fasterxml.jackson.dataformat.csv.CsvMapper;
+import com.fasterxml.jackson.dataformat.csv.CsvSchema;
+import com.fasterxml.jackson.dataformat.csv.ModuleTestBase;
+
+public class MissingNullsOnObjectArrayWrite10Test extends ModuleTestBase
+{
+    private final CsvMapper MAPPER = mapperForCsv();
+
+    // for [dataformats-text#10]
+    public void testNullsOnObjectArrayWrites2Col() throws Exception
+    {
+        CsvSchema schema = CsvSchema.builder()
+                .addColumn("a", CsvSchema.ColumnType.NUMBER)
+                .addColumn("b", CsvSchema.ColumnType.NUMBER)
+                .setUseHeader(true)
+                .build();
+        ObjectWriter writer = MAPPER.writer(schema);
+        StringWriter out = new StringWriter();
+        SequenceWriter sequence = writer.writeValues(out);
+
+        sequence.write(new Object[]{ null, 2 });
+        sequence.write(new Object[]{ null, null });
+        sequence.write(new Object[]{ 1, null });
+
+        final String csv = out.toString().trim();
+
+        assertEquals("\"a\",\"b\"\n" +
+             ",2\n" +
+             ",\n" +
+             "1,",
+             csv);
+    }
+}