Debug Wasm tests in the browser!

You can step through the generated code instruction-by-instruction, and examine memory contents

Run ROC_WRITE_FINAL_WASM=1 cargo test-gen-wasm my_test_function_name
Look for the path written to the console for final.wasm and select it in the file picker below
Open the browser DevTools
Control+Shift+I or Command+Option+I or F12
The debugger should pause just before entering the first Wasm call. Step into a couple of Wasm calls until you reach your test code in $main
Chrome DevTools has a handy Memory Inspector panel. In the debugger, find Module -> memories -> $memory. Right click and select "Reveal in Memory Inspector"

Check this box if your test is in gen_refcount.rs

Select final.wasm