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chrome_test.go
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chrome_test.go
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package lorca
import (
"encoding/json"
"errors"
"strings"
"sync"
"sync/atomic"
"testing"
)
func TestChromeEval(t *testing.T) {
c, err := newChromeWithArgs(ChromeExecutable(), "--user-data-dir=/tmp", "--headless", "--remote-debugging-port=0")
if err != nil {
t.Fatal(err)
}
defer c.kill()
for _, test := range []struct {
Expr string
Result string
Error string
}{
{Expr: ``, Result: ``},
{Expr: `42`, Result: `42`},
{Expr: `2+3`, Result: `5`},
{Expr: `(() => ({x: 5, y: 7}))()`, Result: `{"x":5,"y":7}`},
{Expr: `(() => ([1,'foo',false]))()`, Result: `[1,"foo",false]`},
{Expr: `((a, b) => a*b)(3, 7)`, Result: `21`},
{Expr: `Promise.resolve(42)`, Result: `42`},
{Expr: `Promise.reject('foo')`, Error: `"foo"`},
{Expr: `throw "bar"`, Error: `"bar"`},
{Expr: `2+`, Error: `SyntaxError: Unexpected end of input`},
} {
result, err := c.eval(test.Expr)
if err != nil {
if err.Error() != test.Error {
t.Fatal(test.Expr, err, test.Error)
}
} else if string(result) != test.Result {
t.Fatal(test.Expr, string(result), test.Result)
}
}
}
func TestChromeLoad(t *testing.T) {
c, err := newChromeWithArgs(ChromeExecutable(), "--user-data-dir=/tmp", "--headless", "--remote-debugging-port=0")
if err != nil {
t.Fatal(err)
}
defer c.kill()
if err := c.load("data:text/html,<html><body>Hello</body></html>"); err != nil {
t.Fatal(err)
}
for i := 0; i < 10; i++ {
url, err := c.eval(`window.location.href`)
if err != nil {
t.Fatal(err)
}
if strings.HasPrefix(string(url), `"data:text/html,`) {
break
}
}
if res, err := c.eval(`document.body ? document.body.innerText :
new Promise(res => window.onload = () => res(document.body.innerText))`); err != nil {
t.Fatal(err)
} else if string(res) != `"Hello"` {
t.Fatal(res)
}
}
func TestChromeBind(t *testing.T) {
c, err := newChromeWithArgs(ChromeExecutable(), "--user-data-dir=/tmp", "--headless", "--remote-debugging-port=0")
if err != nil {
t.Fatal(err)
}
defer c.kill()
if err := c.bind("add", func(args []json.RawMessage) (interface{}, error) {
a, b := 0, 0
if len(args) != 2 {
return nil, errors.New("2 arguments expected")
}
if err := json.Unmarshal(args[0], &a); err != nil {
return nil, err
}
if err := json.Unmarshal(args[1], &b); err != nil {
return nil, err
}
return a + b, nil
}); err != nil {
t.Fatal(err)
}
if res, err := c.eval(`window.add(2, 3)`); err != nil {
t.Fatal(err)
} else if string(res) != `5` {
t.Fatal(string(res))
}
if res, err := c.eval(`window.add("foo", "bar")`); err == nil {
t.Fatal(string(res), err)
}
if res, err := c.eval(`window.add(1, 2, 3)`); err == nil {
t.Fatal(res, err)
}
}
func TestChromeAsync(t *testing.T) {
c, err := newChromeWithArgs(ChromeExecutable(), "--user-data-dir=/tmp", "--headless", "--remote-debugging-port=0")
if err != nil {
t.Fatal(err)
}
defer c.kill()
if err := c.bind("len", func(args []json.RawMessage) (interface{}, error) {
return len(args[0]), nil
}); err != nil {
t.Fatal(err)
}
wg := &sync.WaitGroup{}
n := 10
failed := int32(0)
wg.Add(n)
for i := 0; i < n; i++ {
go func(i int) {
defer wg.Done()
v, err := c.eval("len('hello')")
if string(v) != `7` {
atomic.StoreInt32(&failed, 1)
} else if err != nil {
atomic.StoreInt32(&failed, 2)
}
}(i)
}
wg.Wait()
if status := atomic.LoadInt32(&failed); status != 0 {
t.Fatal()
}
}