How to write tests?

[breml]

trafficstars

I tried to write tests in combination with this package. I tired with this minimal file (react_test.go):

package testreact

import (
	"testing"

	_ "myitcv.io/react"
)

func TestReact(t *testing.T) {
	t.Log("OK")
}

If I execute go test ., the following output is given:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x4e6082]

goroutine 1 [running]:
github.com/gopherjs/gopherjs/js.(*Object).Get(0x0, 0x5311e3, 0x5, 0xc4200543e0)
	/home/lubr/code/go/src/github.com/gopherjs/gopherjs/js/js.go:32 +0x22
FAIL	github.com/breml/reacttest/test	0.003s

If I use gopherjs tes ., then the output is:

gopherjs: Source maps disabled. Install source-map-support module for nice stack traces. See https://github.com/gopherjs/gopherjs#gopherjs-run-gopherjs-test.
/home/lubr/code/go/src/github.com/breml/reacttest/test/test.629576433:24995
var o=Object.getOwnPropertySymbols,a=Object.prototype.hasOwnProperty,i=Object.prototype.propertyIsEnumerable;e.exports=function(){try{if(!Object.assign)return!1;var e=new String("abc");if(e[5]="de","5"===Object.getOwnPropertyNames(e)[0])return!1;for(var t={},n=0;n<10;n++)t["_"+String.fromCharCode(n)]=n;if("0123456789"!==Object.getOwnPropertyNames(t).map(function(e){return t[e]}).join(""))return!1;var r={};return"abcdefghijklmnopqrst".split("").forEach(function(e){r[e]=e}),"abcdefghijklmnopqrst"===Object.keys(Object.assign({},r)).join("")}catch(e){return!1}}()?Object.assign:function(e,t){for(var n,l,u=r(e),c=1;c<arguments.length;c++){n=Object(arguments[c]);for(var s in n)a.call(n,s)&&(u[s]=n[s]);if(o){l=o(n);for(var f=0;f<l.length;f++)i.call(n,l[f])&&(u[l[f]]=n[l[f]])}}return u}},function(e,t,n){"use strict";var r={};e.exports=r},function(e,t,n){"use strict";function r(e){return function(){return e}}var o=function(){};o.thatReturns=r

ReferenceError: window is not defined
    at Object.t (/home/lubr/code/go/src/github.com/breml/reacttest/test/test.629576433:24995:1138)
    at t (/home/lubr/code/go/src/github.com/breml/reacttest/test/test.629576433:24990:146)
    at /home/lubr/code/go/src/github.com/breml/reacttest/test/test.629576433:24990:503
    at /home/lubr/code/go/src/github.com/breml/reacttest/test/test.629576433:24990:512
    at Object.<anonymous> (/home/lubr/code/go/src/github.com/breml/reacttest/test/test.629576433:25012:5)
    at Object.<anonymous> (/home/lubr/code/go/src/github.com/breml/reacttest/test/test.629576433:35738:4)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Function.Module.runMain (module.js:442:10)
    at startup (node.js:136:18)
    at node.js:966:3
FAIL	github.com/breml/reacttest/test	0.299s

[myitcv]

@breml good question.

gopherjs test uses the Node environment; hence the window global is not available.

For this reason I wrote (the very basic) myitcv.io/gjbt which enables you to run tests within a headless Chrome instance.

The myitcv.io/react tests themselves use this approach.

Skeleton tests for all of the generated elements are themselves also generated in case you need any inspiration, e.g. the <a> element tests.

Let me know how you get on.

[breml]

@myitcv I tried gjbt, but this does not yet look clean to me.

I installed chromedriver, added the init_test.go file as suggested and run gjbt .. I then get this output:

ok  	github.com/breml/reacttest/test	0.046s
panic: failed to retrieve logs: unexpected response: {"sessionId":"a6fa970438e2285d182fe582c707e7a2","status":6,"value":{"message":"no such session\n  (Driver info: chromedriver=2.9.248304,platform=Linux 4.4.0-122-generic x86_64)"}}

goroutine 1 [running]:
main.main()
	/home/lubr/code/go/src/github.com/myitcv/gjbt/main.go:163 +0xe8b

It looks like the test have been executed (and are successful), but I still get the above mentioned panic. Do you have an idea why this happens?

[myitcv]

@breml there have been a few more commits recently to gjbt (as well as some improve documentation) which probably fix the issue you've seen. Please can you give it another try?

In particular, the README now lists requirements:

https://github.com/myitcv/gjbt