Regression testing

Generating local regression test data

Developers are encouraged to create local benchmark data for regression testing prior to committing code the GitLab repository.

Create a location to store benchmark data and clone the MFIX-Exa and AMReX repositories.

mkdir /home/user/exa-rt
mkdir /home/user/exa-rt/benchmark
cd /home/user/exa-rt
git clone http://mfix.netl.doe.gov/gitlab/exa/mfix.git
git clone https://github.com/AMReX-Codes/amrex.git

Create a local copy the regression test setup file from the MFIX-Exa repository.
```
cp mfix/RegressionTesting/MFiX-tests.ini MFiX-local.ini
```
Edit the local setup file. Specify the top level directories for test and web output under the [main] heading.
```
[main]
testTopDir = /home/user/exa-rt/benchmark
webTopDir =  /home/user/exa-rt/web
```
Specify the AMReX source directory location under the [AMReX] heading.
```
[AMReX]
dir = /home/user/exa-rt/amrex
branch = development
```
Specify the MFIX-Exa source directory location under the [source] heading.
```
[source]
dir = /home/user/exa-rt/mfix
branch = develop
```

Run the AMReX regression test tool. The second argument is a user supplied comment.

cd /home/user/exa-rt
amrex/Tools/RegressionTesting/regtest.py --make_benchmarks "MFiX" MFiX-local.ini

## Prerequisite: Environment Dependencies on Joule (Joule specific)

For the Joule environment, load the gnu module and set environment variables first. If not on Joule, skip this step.

```shell

> module load gnu/6.1.0

> export CC=/nfs/apps/Compilers/GNU/6.1.0/bin/gcc

> export CXX=/nfs/apps/Compilers/GNU/6.1.0/bin/g++

> export F77=/nfs/apps/Compilers/GNU/6.1.0/bin/gfortran

> export FC=/nfs/apps/Compilers/GNU/6.1.0/bin/gfortran

```