harfbuzz/TESTING.md

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## Build & Run
Depending on what area you are working in change or add `HB_DEBUG_<whatever>`.
Values defined in `hb-debug.hh`.
```shell
# quick sanity check
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time (make -j4 CPPFLAGS='-DHB_DEBUG_SUBSET=100' \
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&& (make -j4 -C test/api check || cat test/api/test-suite.log))
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# slower sanity check
time (make -j4 CPPFLAGS='-DHB_DEBUG_SUBSET=100' \
&& make -j4 -C src check \
&& make -j4 -C test/api check \
&& make -j4 -C test/subset check)
# confirm you didn't break anything else
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time (make -j4 CPPFLAGS='-DHB_DEBUG_SUBSET=100' \
&& make -j4 check)
# often catches files you didn't add, e.g. test fonts to EXTRA_DIST
make distcheck
```
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### Run tests with asan
```shell
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# For nice symbols tell asan how to symoblize. Note that it doesn't like versioned copies like llvm-symbolizer-3.8
# export ASAN_SYMBOLIZER_PATH=path to version-less llvm-symbolizer
# ex
export ASAN_SYMBOLIZER_PATH=/usr/lib/llvm-3.8/bin/llvm-symbolizer
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./configure CC=clang CXX=clang++ CPPFLAGS=-fsanitize=address LDFLAGS=-fsanitize=address
# make/run tests as usual
```
### Debug with GDB
```
cd ./util
../libtool --mode=execute gdb --args ./hb-subset ...
```
### Enable Debug Logging
```shell
# make clean if you previously build w/o debug logging
make CPPFLAGS=-DHB_DEBUG_SUBSET=100
```
## Build and Test via CMake
Note: You'll need to first install ninja-build via apt-get.
```shell
cd harfbuzz
mkdir buid
cmake -DHB_CHECK=ON -Bbuild -H. -GNinja && ninja -Cbuild && CTEST_OUTPUT_ON_FAILURE=1 ninja -Cbuild test
```
## Test with the Fuzzer
```shell
# push your changs to a branch on googlefonts/harfbuzz
# In a local copy of oss-fuzz, edit projects/harfbuzz/Dockerfile
# Change the git clone to pull your branch
sudo python infra/helper.py build_image harfbuzz
sudo python infra/helper.py build_fuzzers --sanitizer address harfbuzz
sudo python infra/helper.py run_fuzzer harfbuzz hb-subset-fuzzer
```