BUG: Use unique filenames for Nifti tests

When the tests are run in parallel they can try to write to or remove
the same file from different processes, causing intermittent failures.

Also add `const` where it is missing.

Also use full paths as tests inputs, instead of changing directories,
which is more explicit.

Modules/IO/NIFTI/test/CMakeLists.txt

@@ -37,7 +37,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/itkNiftisform2DirectionDefNiiGzTest.nii
   DATA{${ITK_DATA_ROOT}/Input/itkNiftisform2DirectionDef.nii.gz})
 
 itk_add_test(
@@ -46,7 +46,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/itkNiftiIOBigEndianCompressedHdrTest.nii
   itkNiftiIOBigEndianCompressed.hdr
   DATA{${ITK_DATA_ROOT}/Input/BigEndianCompressed.hdr})
 itk_add_test(
@@ -55,7 +55,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/itkNiftiIOBigEndianCompressedImgTest.nii
   itkNiftiIOBigEndianCompressed.img
   DATA{${ITK_DATA_ROOT}/Input/BigEndianCompressed.img})
 itk_add_test(
@@ -64,7 +64,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/itkNiftiIOBigEndianCompressedImgGz.nii
   itkNiftiIOBigEndianCompressed.img.gz
   DATA{${ITK_DATA_ROOT}/Input/BigEndianCompressed.img.gz})
 itk_add_test(
@@ -73,7 +73,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/itkNiftiIOBigEndianTest.nii
   itkNiftiIOBigEndian
   DATA{${ITK_DATA_ROOT}/Input/BigEndian.hdr,BigEndian.mhd,BigEndian.img})
 itk_add_test(
@@ -82,7 +82,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/itkNiftiIOLittleEndianCompressedTest.nii
   itkNiftiImageIOTest
   DATA{${ITK_DATA_ROOT}/Input/LittleEndianCompressed.hdr,LittleEndianCompressed.img.gz})
 itk_add_test(
@@ -91,7 +91,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/itkNiftiIOLittleEndianCompressedTest.nii
   itkNiftiIOLittleEndian
   DATA{${ITK_DATA_ROOT}/Input/LittleEndian.hdr,LittleEndian.mhd,LittleEndian.img})
 itk_add_test(
@@ -100,7 +100,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest
-  ${ITK_TEST_OUTPUT_DIR})
+  ${ITK_TEST_OUTPUT_DIR}/itkNiftiIOInternalTestsTest.nii)
 itk_add_test(
   NAME
   itkNiftiIOShouldFail
@@ -252,7 +252,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest14
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/xyzt_units_output_check.nii
   DATA{Input/xyzt_units_test_scl_mm_s.nii.gz}
   DATA{Input/xyzt_units_test_scl.nii.gz}
   )
@@ -263,7 +263,7 @@ itk_add_test(
   COMMAND
   ITKIONIFTITestDriver
   itkNiftiImageIOTest14
-  ${ITK_TEST_OUTPUT_DIR}
+  ${ITK_TEST_OUTPUT_DIR}/xyzt_units_output_check2.nii
   DATA{Input/xyzt_units_test_scl_mm_s.nii.gz}
   DATA{Input/xyzt_units_test_scl_mm_s.nii.gz}
   )

Modules/IO/NIFTI/test/itkNiftiImageIOTest.cxx

@@ -103,14 +103,16 @@ itkNiftiImageIOTest(int argc, char * argv[])
   itk::ObjectFactoryBase::UnRegisterAllFactories();
   itk::NiftiImageIOFactory::RegisterOneFactory();
   int rval = 0;
-  //
-  // first argument is passing in the writable directory to do all testing
-  if (argc > 1)
+  if (argc < 2)
   {
-    char * testdir = *++argv;
-    --argc;
-    itksys::SystemTools::ChangeDirectory(testdir);
+    std::cerr << "testFileName required." << std::endl;
+    return EXIT_FAILURE;
   }
+  //
+  // first argument is the test filepath to do all testing
+  const char * testFileName = *++argv;
+  --argc;
+
   std::string prefix = "";
   if (argc > 1)
   {
@@ -158,74 +160,74 @@ itkNiftiImageIOTest(int argc, char * argv[])
   else // This is the mechanism for doing internal testing of all data types.
   {
     int cur_return;
-    cur_return = MakeNiftiImage<char>();
+    cur_return = MakeNiftiImage<char>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type char" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<unsigned char>();
+    cur_return = MakeNiftiImage<unsigned char>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type unsigned char" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<short>();
+    cur_return = MakeNiftiImage<short>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type short" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<unsigned short>();
+    cur_return = MakeNiftiImage<unsigned short>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type unsigned short" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<int>();
+    cur_return = MakeNiftiImage<int>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type int" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<unsigned int>();
+    cur_return = MakeNiftiImage<unsigned int>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type unsigned int" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<long>();
+    cur_return = MakeNiftiImage<long>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type long" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<unsigned long>();
+    cur_return = MakeNiftiImage<unsigned long>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type unsigned long" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<long long>();
+    cur_return = MakeNiftiImage<long long>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type long long" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<unsigned long long>();
+    cur_return = MakeNiftiImage<unsigned long long>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type unsigned long long" << std::endl;
       rval += cur_return;
     }
-    cur_return = MakeNiftiImage<float>();
+    cur_return = MakeNiftiImage<float>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type float" << std::endl;
       rval += cur_return;
     }
     // awaiting a double precision byte swapper
-    cur_return = MakeNiftiImage<double>();
+    cur_return = MakeNiftiImage<double>(testFileName);
     if (cur_return != 0)
     {
       std::cerr << "Error writing Nifti file type double" << std::endl;

Modules/IO/NIFTI/test/itkNiftiImageIOTest.h

@@ -61,10 +61,9 @@ PreFillDirection();
 
 template <typename T>
 int
-MakeNiftiImage()
+MakeNiftiImage(const char * filename)
 {
   using ImageType = itk::Image<T, 3>;
-  const char * filename = "test.nii";
   // Allocate Images
   enum
   {

Modules/IO/NIFTI/test/itkNiftiImageIOTest14.cxx

@@ -32,19 +32,18 @@ itkNiftiImageIOTest14(int argc, char * argv[])
   // images should have the same size, spacing, and origin, but may have different units
   if (argc != 4)
   {
-    std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " test_dir ref_image test_image" << std::endl;
+    std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " output_test_fn ref_image test_image" << std::endl;
     return EXIT_FAILURE;
   }
 
   // first arg is output dir
-  char * test_dir = argv[1];
-  itksys::SystemTools::ChangeDirectory(test_dir);
+  const char * output_test_fn = argv[1];
 
   // second arg is reference image in mm and sec
-  char * ref_image_fn = argv[2];
+  const char * ref_image_fn = argv[2];
 
   // third arg is the test image in different units
-  char * test_image_fn = argv[3];
+  const char * test_image_fn = argv[3];
 
   constexpr unsigned int Dimension = 4;
 
@@ -90,8 +89,6 @@ itkNiftiImageIOTest14(int argc, char * argv[])
     }
   }
 
-  const std::string output_test_fn = std::string(test_dir) + "/xyzt_units_output_check.nii";
-
   // set the origin of time to a non-zero value
   auto newOrigin = ImageType::PointType();
   newOrigin[0] = 1.0;
@@ -162,8 +159,6 @@ itkNiftiImageIOTest14(int argc, char * argv[])
     throw;
   }
 
-  itk::IOTestHelper::Remove(output_test_fn.c_str());
-
   if (metadataHasCorrectXYZTTUnits && metadataHasCorrectToffset && imageHasCorrectTimeOrigin)
   {
     return EXIT_SUCCESS;