wasmbrowsertest alternatives and similar packages
Based on the "WebAssembly" category.
Alternatively, view wasmbrowsertest alternatives based on common mentions on social networks and blogs.
8.4 0.0 wasmbrowsertest VS vectyVecty lets you build responsive and dynamic web frontends in Go using WebAssembly, competing with modern web frameworks like React & VueJS.
Do you think we are missing an alternative of wasmbrowsertest or a related project?
Run Go wasm tests easily in your browser.
If you have a codebase targeting the wasm platform, chances are you would want to test your code in a browser. Currently, that process is a bit cumbersome:
- The test needs to be compiled to a wasm file.
- Then loaded into an HTML file along with the wasm_exec.js.
- And finally, this needs to be served with a static file server and then loaded in the browser.
This tool automates all of that. So you just have to type
GOOS=js GOARCH=wasm go test, and it automatically executes the tests inside a browser !
go get github.com/agnivade/wasmbrowsertest. This will place the binary in $GOPATH/bin, or $GOBIN, if that has a different value.
- Rename the binary to
- Add $GOBIN to $PATH if it is not already done.
- Run tests as usual:
GOOS=js GOARCH=wasm go test.
- You can also take a cpu profile. Set the
-cpuprofileflag for that.
Ok, but how does the magic work ?
go test allows invocation of a different binary to run a test.
go help test has a line:
Run the test binary using xprog. The behavior is the same as
in 'go run'. See 'go help run' for details.
go help run says:
By default, 'go run' runs the compiled binary directly: 'a.out arguments...'.
If the -exec flag is given, 'go run' invokes the binary using xprog:
'xprog a.out arguments...'.
If the -exec flag is not given, GOOS or GOARCH is different from the system
default, and a program named go_$GOOS_$GOARCH_exec can be found
on the current search path, 'go run' invokes the binary using that program,
for example 'go_nacl_386_exec a.out arguments...'. This allows execution of
cross-compiled programs when a simulator or other execution method is
So essentially, there are 2 ways:
- Either have a binary with the name of
go_js_wasm_execin your $PATH.
- Or set the
-execflag in your tests.
Use whatever works for you.
How is a CPU profile taken ?
A CPU profile is run during the duration of the test, and then converted to the pprof format so that it can be natively analyzed with the Go toolchain.
Can I run something which is not a test ?
GOOS=js GOARCH=wasm go run main.go also works. If you want to actually see the application running in the browser, set the
WASM_HEADLESS variable to
off like so
WASM_HEADLESS=off GOOS=js GOARCH=wasm go run main.go.
Can I use this inside Travis ?
Add these lines to your
- go get github.com/agnivade/wasmbrowsertest
- mv $GOPATH/bin/wasmbrowsertest $GOPATH/bin/go_js_wasm_exec
- export PATH=$GOPATH/bin:$PATH
Now, just setting
GOOS=js GOARCH=wasm will run your tests using
wasmbrowsertest. For other CI environments, you have to do something similar.
What sorts of browsers are supported ?
This tool uses the ChromeDP protocol to run the tests inside a Chrome browser. So Chrome or any blink-based browser will work.
Why not firefox ?
Great question. The initial idea was to use a Selenium API and drive any browser to run the tests. But unfortunately, geckodriver does not support the ability to capture console logs - https://github.com/mozilla/geckodriver/issues/284. Hence, the shift to use the ChromeDP protocol circumvents the need to have any external driver binary and just have a browser installed in the machine.