cf0e650435
add getScaleArray() method test two dimension scale icons test two dimension scale text add example of icon and label scaling use smaller icon and larger interval test two dimensional scale icons test two dimensional scale icons
Rendering Tests
The rendering tests use Puppeteer to take a screenshot of a map and compare it to an expected screenshot. Each directory in the cases directory includes a single test case with the following files:
main.js- the script that sets up the map and calls the magicrender()functionexpected.png- the expected screenshot (this can be generated with the--fixflag)actual.png- the screenshot generated when running the tests (ignored by git)pass- a generated marker file that represents the last time the test passed (ignored by git)
Running the tests
To run all the rendering tests:
node rendering/test.js
To run a single rendering test case:
node rendering/test.js --match your-test-case-name
If you want to leave the test server running (and the test browser open) after running a test, use the --interactive option.
node rendering/test.js --match your-test-case-name --interactive
Creating a new test
To create a new test case, add a directory under cases and add a main.js to it (copied from one of the other cases). Then to generate the expected.png screenshot, run the test script with the --fix flag:
node rendering/test.js --match your-test-case-name --fix
Note that your main.js needs to call the magic render() function after setting up the map. This triggers a snapshot. The render() function can be called with an options object that includes a tolerance property. The tolerance is related to the ratio of mismatched pixels to the total number of pixels in the actual screenshot.
After creating a new test case, commit your main.js and expected.png files.