--- a/UnitTestsSources/DicomMapTests.cpp	Wed Dec 12 09:08:34 2018 +0100
+++ b/UnitTestsSources/DicomMapTests.cpp	Wed Dec 12 15:42:33 2018 +0100
@@ -37,8 +37,12 @@
 #include "../Core/OrthancException.h"
 #include "../Core/DicomFormat/DicomMap.h"
 #include "../Core/DicomParsing/FromDcmtkBridge.h"
+#include "../Core/DicomParsing/ParsedDicomFile.h"
+
+#include "../OrthancServer/DicomInstanceToStore.h"
 
 #include <memory>
+#include <dcmtk/dcmdata/dcdeftag.h>
 
 using namespace Orthanc;
 
@@ -409,3 +413,94 @@
     ASSERT_THROW(v->GetContent(), OrthancException);
   }
 }
+
+
+
+TEST(DicomMap, DicomAsJson)
+{
+  // This is a Latin-1 test string: "crane" with a circumflex accent
+  const unsigned char raw[] = { 0x63, 0x72, 0xe2, 0x6e, 0x65 };
+  std::string latin1((char*) &raw[0], sizeof(raw) / sizeof(char));
+
+  std::string utf8 = Toolbox::ConvertToUtf8(latin1, Encoding_Latin1);
+
+  ParsedDicomFile dicom(false);
+  dicom.SetEncoding(Encoding_Latin1);
+  dicom.ReplacePlainString(DICOM_TAG_PATIENT_NAME, "Hello");
+  dicom.ReplacePlainString(DICOM_TAG_STUDY_DESCRIPTION, utf8);
+  dicom.ReplacePlainString(DICOM_TAG_SERIES_DESCRIPTION, std::string(ORTHANC_MAXIMUM_TAG_LENGTH, 'a'));
+  dicom.ReplacePlainString(DICOM_TAG_MANUFACTURER, std::string(ORTHANC_MAXIMUM_TAG_LENGTH + 1, 'a'));
+  dicom.ReplacePlainString(DICOM_TAG_PIXEL_DATA, "binary");
+  dicom.ReplacePlainString(DICOM_TAG_ROWS, "512");
+
+  DcmDataset& dataset = *dicom.GetDcmtkObject().getDataset();
+  dataset.insertEmptyElement(DCM_StudyID, OFFalse);
+
+  {
+    std::auto_ptr<DcmSequenceOfItems> sequence(new DcmSequenceOfItems(DCM_ReferencedSeriesSequence));
+
+    {
+      std::auto_ptr<DcmItem> item(new DcmItem);
+      item->putAndInsertString(DCM_ReferencedSOPInstanceUID, "nope", OFFalse);
+      ASSERT_TRUE(sequence->insert(item.release(), false, false).good());
+    }
+
+    ASSERT_TRUE(dataset.insert(sequence.release(), false, false).good());
+  }
+  
+                          
+  // Check re-encoding
+  DcmElement* element = NULL;
+  ASSERT_TRUE(dataset.findAndGetElement(DCM_StudyDescription, element).good() &&
+              element != NULL);
+
+  char* c = NULL;
+  ASSERT_TRUE(element != NULL &&
+              element->isLeaf() &&
+              element->isaString() &&
+              element->getString(c).good());
+  ASSERT_EQ(0, memcmp(c, raw, latin1.length()));
+
+  ASSERT_TRUE(dataset.findAndGetElement(DCM_Rows, element).good() &&
+              element != NULL &&
+              element->getTag().getEVR() == EVR_US);
+
+  DicomInstanceToStore toStore;
+  toStore.SetParsedDicomFile(dicom);
+
+  DicomMap m;
+  m.FromDicomAsJson(toStore.GetJson());
+
+  ASSERT_EQ("ISO_IR 100", m.GetValue(DICOM_TAG_SPECIFIC_CHARACTER_SET).GetContent());
+  
+  ASSERT_FALSE(m.GetValue(DICOM_TAG_PATIENT_NAME).IsBinary());
+  ASSERT_EQ("Hello", m.GetValue(DICOM_TAG_PATIENT_NAME).GetContent());
+  
+  ASSERT_FALSE(m.GetValue(DICOM_TAG_STUDY_DESCRIPTION).IsBinary());
+  ASSERT_EQ(utf8, m.GetValue(DICOM_TAG_STUDY_DESCRIPTION).GetContent());
+
+  ASSERT_FALSE(m.HasTag(DICOM_TAG_MANUFACTURER));                // Too long
+  ASSERT_FALSE(m.HasTag(DICOM_TAG_PIXEL_DATA));                  // Pixel data
+  ASSERT_FALSE(m.HasTag(DICOM_TAG_REFERENCED_SERIES_SEQUENCE));  // Sequence
+  ASSERT_EQ(DICOM_TAG_REFERENCED_SERIES_SEQUENCE.GetGroup(), DCM_ReferencedSeriesSequence.getGroup());
+  ASSERT_EQ(DICOM_TAG_REFERENCED_SERIES_SEQUENCE.GetElement(), DCM_ReferencedSeriesSequence.getElement());
+
+  ASSERT_TRUE(m.HasTag(DICOM_TAG_SERIES_DESCRIPTION));  // Maximum length
+  ASSERT_FALSE(m.GetValue(DICOM_TAG_SERIES_DESCRIPTION).IsBinary());
+  ASSERT_EQ(ORTHANC_MAXIMUM_TAG_LENGTH, m.GetValue(DICOM_TAG_SERIES_DESCRIPTION).GetContent().length());
+
+  ASSERT_FALSE(m.GetValue(DICOM_TAG_ROWS).IsBinary());
+  ASSERT_EQ("512", m.GetValue(DICOM_TAG_ROWS).GetContent());
+
+  ASSERT_FALSE(m.GetValue(DICOM_TAG_STUDY_ID).IsNull());
+  ASSERT_FALSE(m.GetValue(DICOM_TAG_STUDY_ID).IsBinary());
+  ASSERT_EQ("", m.GetValue(DICOM_TAG_STUDY_ID).GetContent());
+
+  DicomArray a(m);
+  ASSERT_EQ(6u, a.GetSize());
+
+  
+  //dicom.SaveToFile("/tmp/test.dcm"); 
+  //std::cout << toStore.GetJson() << std::endl;
+  //a.Print(stdout);
+}