| # Compare Goldens |
| |
| This is a script that will let you check golden image diffs locally. |
| |
| The directories are scanned for png files that match in name, then the diff |
| is written to `diff_<name of file>` in the CWD. This allows you to get |
| results quicker than having to upload to skia gold. By default it uses fuzzy |
| RMSE to compare. |
| |
| ## Usage |
| |
| ```sh |
| dart run compare_goldens <dir path> <dir path> |
| ``` |
| |
| Here's the steps for using this with something like impeller golden tests: |
| |
| 1) Checkout a base revision |
| 2) Build impeller_golden_tests |
| 3) Execute `impeller_golden_tests --working_dir=\<path a\> |
| 4) Checkout test revision |
| 5) Build impeller_golden_tests |
| 6) Execute `impeller_golden_tests --working_dir=\<path b\> |
| 7) Execute `compare_goldens \<path a\> \<path b\> |
| |
| ## Requirements |
| |
| - ImageMagick is installed on $PATH |
| |
| ## Testing |
| |
| To run the tests: |
| |
| ```sh |
| dart pub get |
| find . -name "*_test.dart" | xargs -n 1 dart --enable-asserts |
| ``` |
