BUG: Missing associated test data

When running tests requiring the file 'mri3D.mhd',
this file was added as a file with no associated data file.
However, mri3D.mhd does not contain data, but is merely
a header file. The image data is contained in:
DicomSeries/Image%04d.dcm 75 77 1
The data file and its associated files are in different
directories, respectively ${ITK_DATA_ROOT}/Input/ and
${ITK_DATA_ROOT}/Input/DicomSeries/
Since DATA{} does not allow to specify an associated
file that is in a different directory, we call ExternalData_Expand_Arguments
manually to download the required files.

The tests using mri3D.mhd currently seem to be working but
they only pass because other tests download the
data files before these specific tests are run.
If ITK is built with only a few
modules ON, such as ITKIOMeta and ITKMetaIO,
the tests requiring mri3D.mhd will fail.

Change-Id: I86576d30bd1b50bb4bc438a2ab88842a4c6e8d1b

Examples/Filtering/test/CMakeLists.txt

@@ -618,6 +618,20 @@ itk_add_test(NAME  ResampleImageFilter7Test COMMAND ${ITK_TEST_DRIVER}
         ${TEMP}/ResampleImageFilter7PixelCentered.png
         33
 )
+
+# The data contained in ${ITK_DATA_ROOT}/Input/DicomSeries/
+# is required by mri3D.mhd:
+# ElementDataFile = DicomSeries/Image%04d.dcm 75 77 1
+# The data file and its associated files are in different
+# directories, respectively ${ITK_DATA_ROOT}/Input/ and
+# ${ITK_DATA_ROOT}/Input/DicomSeries/
+# Since DATA{} does not allow to specify an associated
+# file that is in a different directory, we call ExternalData_Expand_Arguments
+# manually to download the required files.
+ExternalData_Expand_Arguments(ITKData
+                              ExpandedData
+                              DATA{${ITK_DATA_ROOT}/Input/DicomSeries/,REGEX:Image[0-9]+.dcm}
+                             )
 itk_add_test(NAME  ResampleVolumesToBeIsotropicTest COMMAND ${ITK_TEST_DRIVER}
   --compare DATA{${BASELINE}/ResampleVolumesToBeIsotropic.mha}
             ${TEMP}/ResampleVolumesToBeIsotropic.mha

Modules/Filtering/FFT/test/CMakeLists.txt

@@ -135,6 +135,19 @@ itk_add_test(NAME itkComplexToComplexFFTImageFilter2DFloatTest
       DATA{${ITK_DATA_ROOT}/Input/cthead1.png}
       ${ITK_TEST_OUTPUT_DIR}/itkComplexToComplexFFTImageFilter2DFloatTest.mha
       float)
+# The data contained in ${ITK_DATA_ROOT}/Input/DicomSeries/
+# is required by mri3D.mhd:
+# ElementDataFile = DicomSeries/Image%04d.dcm 75 77 1
+# The data file and its associated files are in different
+# directories, respectively ${ITK_DATA_ROOT}/Input/ and
+# ${ITK_DATA_ROOT}/Input/DicomSeries/
+# Since DATA{} does not allow to specify an associated
+# file that is in a different directory, we call ExternalData_Expand_Arguments
+# manually to download the required files.
+ExternalData_Expand_Arguments(ITKData
+                              ExpandedData
+                              DATA{${ITK_DATA_ROOT}/Input/DicomSeries/,REGEX:Image[0-9]+.dcm}
+                             )
 itk_add_test(NAME itkComplexToComplexFFTImageFilter3DFloatTest
   COMMAND ITKFFTTestDriver
     --compare

Modules/IO/Meta/test/CMakeLists.txt

@@ -148,6 +148,21 @@ itk_add_test(NAME itkMetaImageStreamingWriterIOTest
     --compare DATA{${ITK_DATA_ROOT}/Baseline/IO/HeadMRVolume.mhd,HeadMRVolume.raw}
               ${ITK_TEST_OUTPUT_DIR}/MetaImageStreamingWriterIOTest.mha
     itkMetaImageStreamingWriterIOTest DATA{${ITK_DATA_ROOT}/Input/HeadMRVolume.mhd,HeadMRVolume.raw} ${ITK_TEST_OUTPUT_DIR}/MetaImageStreamingWriterIOTest.mha)
+
+# The data contained in ${ITK_DATA_ROOT}/Input/DicomSeries/
+# is required by mri3D.mhd:
+# ElementDataFile = DicomSeries/Image%04d.dcm 75 77 1
+# The data file and its associated files are in different
+# directories, respectively ${ITK_DATA_ROOT}/Input/ and
+# ${ITK_DATA_ROOT}/Input/DicomSeries/
+# Since DATA{} does not allow to specify an associated
+# file that is in a different directory, we call ExternalData_Expand_Arguments
+# manually to download the required files.
+ExternalData_Expand_Arguments(ITKData
+                              ExpandedData
+                              DATA{${ITK_DATA_ROOT}/Input/DicomSeries/,REGEX:Image[0-9]+.dcm}
+                             )
+
 itk_add_test(NAME itkMetaImageStreamingWriterIOTest2
       COMMAND ITKIOMetaTestDriver
       --compare DATA{${ITK_DATA_ROOT}/Input/mri3D.mhd}