TestErrorHandling.cpp File Reference

Example demonstrating MOAB's trace back error handler in serial. More...

#include "moab/Core.hpp"
#include <iostream>
#include <memory>

Include dependency graph for TestErrorHandling.cpp:

Go to the source code of this file.

Functions
ErrorCode	TestErrorHandling_1 ()
ErrorCode	TestErrorHandling_2 ()
ErrorCode	TestErrorHandling_3 ()
ErrorCode	TestErrorHandling_4 ()
int	main (int argc, char **argv)

Detailed Description

Example demonstrating MOAB's trace back error handler in serial.

This example shows how to:

• Initialize and finalize MOAB's error handler
• Simulate different types of errors in serial execution
• Handle various MOAB error codes and error propagation
• Test error handling for file loading, tag creation, and tag iteration

The example demonstrates four test cases:

• Test case 1: Error MB_NOT_IMPLEMENTED (unsupported variable on edges)
• Test case 2: Error MB_TYPE_OUT_OF_RANGE (invalid GATHER_SET option)
• Test case 3: Error MB_FAILURE (NOMESH option with NULL file set)
• Test case 4: Error MB_VARIABLE_DATA_LENGTH (variable-length tag iteration)

Author

MOAB Development Team

Date

2024

Description: This example tests MOAB's trace back error handler in serial.
To run: ./TestErrorHandling <test_case_num(1 to 4)>

Parameters

argc	Number of command line arguments
argv	Command line arguments array

Returns

0 on success, 1 on failure

Definition in file TestErrorHandling.cpp.

Function Documentation

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 107 of file TestErrorHandling.cpp.

{
    if( argc < 2 )
    {
        cout << "Usage: " << argv[0] << " <test_case_num(1 to 4)>" << endl;
        return 0;
    }
 
#ifdef MOAB_HAVE_MPI
    MPI_Init( &argc, &argv );
#endif
 
    // Initialize error handler, optional for this example (using moab instances)
    MBErrorHandler_Init();
 
    ErrorCode rval = MB_SUCCESS;
 
    int test_case_num = atoi( argv[1] );
    switch( test_case_num )
    {
        case 1:
            MB_CHK_ERR( TestErrorHandling_1() );
            break;
        case 2:
            MB_CHK_ERR( TestErrorHandling_2() );
            break;
        case 3:
            MB_CHK_ERR( TestErrorHandling_3() );
            break;
        case 4:
            MB_CHK_ERR( TestErrorHandling_4() );
            break;
        default:
            break;
    }
 
    // Finalize error handler, optional for this example (using moab instances)
    MBErrorHandler_Finalize();
 
#ifdef MOAB_HAVE_MPI
    MPI_Finalize();
#endif
 
    return 0;
}

References ErrorCode, MB_CHK_ERR, MB_SUCCESS, moab::MBErrorHandler_Finalize(), moab::MBErrorHandler_Init(), TestErrorHandling_1(), TestErrorHandling_2(), TestErrorHandling_3(), and TestErrorHandling_4().

TestErrorHandling_1()

ErrorCode TestErrorHandling_1

(

)

Definition at line 42 of file TestErrorHandling.cpp.

{
    Core moab;
    Interface& mb = moab;
 
    // Load a CAM-FV file and read a variable on edges (not supported yet)
    string test_file = string( MESH_DIR ) + string( "/io/fv3x46x72.t.3.nc" );
    MB_CHK_ERR( mb.load_file( test_file.c_str(), NULL, "VARIABLE=US" ) );
 
    return MB_SUCCESS;
}

References moab::Core::load_file(), mb, MB_CHK_ERR, MB_SUCCESS, and MESH_DIR.

Referenced by main().

TestErrorHandling_2()

ErrorCode TestErrorHandling_2

(

)

Definition at line 55 of file TestErrorHandling.cpp.

{
    Core moab;
    Interface& mb = moab;
 
    // Load a HOMME file with an invalid GATHER_SET option
    string test_file = string( MESH_DIR ) + string( "/io/homme3x3458.t.3.nc" );
    MB_CHK_ERR( mb.load_file( test_file.c_str(), NULL, "VARIABLE=T;GATHER_SET=0.1" ) );
 
    return MB_SUCCESS;
}

References moab::Core::load_file(), mb, MB_CHK_ERR, MB_SUCCESS, and MESH_DIR.

Referenced by main().

TestErrorHandling_3()

ErrorCode TestErrorHandling_3

(

)

Definition at line 68 of file TestErrorHandling.cpp.

{
    Core moab;
    Interface& mb = moab;
 
    // Load a CAM-FV file with NOMESH option and a NULL file set
    string test_file = string( MESH_DIR ) + string( "/io/fv3x46x72.t.3.nc" );
    MB_CHK_ERR( mb.load_file( test_file.c_str(), NULL, "NOMESH;VARIABLE=" ) );
 
    return MB_SUCCESS;
}

References moab::Core::load_file(), mb, MB_CHK_ERR, MB_SUCCESS, and MESH_DIR.

Referenced by main().

TestErrorHandling_4()

ErrorCode TestErrorHandling_4

(

)

Definition at line 81 of file TestErrorHandling.cpp.

{
    Core moab;
    Interface& mb = moab;
 
    // Create 100 vertices
    const int NUM_VTX = 100;
    vector< double > coords( 3 * NUM_VTX );
    Range verts;
    MB_CHK_SET_ERR( mb.create_vertices( &coords[0], NUM_VTX, verts ), "Failed to create vertices" );
 
    // Create a variable-length dense tag
    Tag tag;
    MB_CHK_SET_ERR( mb.tag_get_handle( "var_len_den", 1, MB_TYPE_INTEGER, tag,
                                       MB_TAG_VARLEN | MB_TAG_DENSE | MB_TAG_CREAT ),
                    "Failed to create a tag" );
 
    // Attempt to iterate over a variable-length tag, which will never be possible
    void* ptr = NULL;
    int count = 0;
    MB_CHK_SET_ERR( mb.tag_iterate( tag, verts.begin(), verts.end(), count, ptr ),
                    "Failed to iterate over tag on " << NUM_VTX << " vertices" );
 
    return MB_SUCCESS;
}

References moab::Range::begin(), moab::Core::create_vertices(), moab::Range::end(), mb, MB_CHK_SET_ERR, MB_SUCCESS, MB_TAG_CREAT, MB_TAG_DENSE, MB_TAG_VARLEN, MB_TYPE_INTEGER, moab::Core::tag_get_handle(), and moab::Core::tag_iterate().

Referenced by main().