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# Sphinx build info version 1 | ||
# This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done. | ||
config: 19a42ab6518e76f3b59fa593cab1c552 | ||
tags: d77d1c0d9ca2f4c8421862c7c5a0d620 |
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orphan: true | ||
--- | ||
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# Example installation of pFUnit and pFUnit_demos | ||
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## Set up the environment | ||
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Installing pFUnit requires Git, a Fortran compiler and CMake. | ||
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### On a cluster | ||
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On an HPC cluster you might need to add a few environment modules. For | ||
example, on [Tetralith](https://www.nsc.liu.se/systems/tetralith/) you | ||
would do: | ||
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```bash | ||
module add git/2.19.3-nsc1-gcc-system | ||
module add CMake/3.16.4-nsc1 | ||
export FC=/software/sse/manual/mpprun/4.1.3/nsc-wrappers/ifort | ||
``` | ||
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### On own computer | ||
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If you don't have [CMake](https://cmake.org/) or a Fortran compiler | ||
installed yet, one option is to install them into a conda environment | ||
by first saving the following into a file `environment.yml`: | ||
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```yaml | ||
name: compilers | ||
channels: | ||
- conda-forge | ||
dependencies: | ||
- cmake | ||
- compilers | ||
``` | ||
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followed by installing the packages into a new environment: | ||
```bash | ||
conda env create -f environment.yml | ||
``` | ||
and finally activating the environment: | ||
```bash | ||
conda activate compilers | ||
``` | ||
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For good measure, set the `FC` variable to point to your | ||
Fortran compiler (adjust path as needed): | ||
```bash | ||
export FC=$HOME/miniconda3/envs/compilers/bin/gfortran | ||
``` | ||
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## Clone the pFUnit repository | ||
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```bash | ||
git clone --recursive [email protected]:Goddard-Fortran-Ecosystem/pFUnit.git | ||
cd pFUnit | ||
``` | ||
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## Configure with Cmake | ||
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```bash | ||
mkdir build | ||
cd build | ||
cmake .. | ||
``` | ||
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## Build and install | ||
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The following will install pFUnit into a directory `installed` under | ||
the `build` directory. | ||
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```bash | ||
make tests | ||
make install | ||
``` | ||
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## Compiling with pFUnit | ||
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When compiling with pFUnit, set: | ||
```bash | ||
export PFUNIT_DIR=$HOME/path/to/pFUnit/build/installed | ||
``` | ||
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and run CMake with `-DCMAKE_PREFIX_PATH=$PFUNIT_DIR`. | ||
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## Clone the pFUnit_demos repository | ||
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This is for testing and learning purposes. | ||
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```bash | ||
git clone [email protected]:Goddard-Fortran-Ecosystem/pFUnit_demos.git | ||
``` | ||
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### Try out the Trivial, Basic, and MPI examples | ||
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```bash | ||
cd pFUnit_demos | ||
export PFUNIT_DIR=~pFUnit/build/installed/PFUNIT-4.2 | ||
cd Trivial | ||
./build_with_cmake_and_run.x | ||
cd ../Basic | ||
./build_with_cmake_and_run.x | ||
cd ../MPI | ||
./build_with_cmake_and_run.x | ||
´´´ |
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This page has been merged with [Motivation](motivation) |
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# Conclusions and recommendations | ||
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## The basics | ||
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- Learn one test framework well enough for basics | ||
- Explore and use the good tools that exist out there | ||
- An incomplete list of testing frameworks can be found in the [Quick Reference](quick-reference) | ||
- Start with some basics | ||
- Some simple thing that test all parts | ||
- Automate tests | ||
- Faster feedback and reduce the number of surprises | ||
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## Going more in-depth | ||
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- Strike a healthy balance between unit tests and integration tests | ||
- As the code gets larger and the chance of undetected bugs | ||
increases, tests should increase | ||
- When adding new functionality, also add tests | ||
- When you discover and fix a bug, also commit a test against this bug | ||
- Use code coverage analysis to identify untested or unused code | ||
- If you make your code easier to test, it becomes more modular | ||
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## Ways to get started | ||
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You probably won't do everything perfectly when you start off... But | ||
what are some of the easy starting points? | ||
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- Do you have some single functions that are easy to test, but hard to | ||
verify just by looking at them? Add unit tests. | ||
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- Do you have data analysis or simulation of some sort? Make an | ||
end-to-end test with sample data, or sample parameters. This is | ||
useful as an example anyway. | ||
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- A local testing framework + GitHub actions is very easy! And works | ||
well in the background - you do whatever you want and get an email | ||
if you break things. It's actually pretty freeing. |
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