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example.go
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example.go
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// +build js
package testing
import (
"fmt"
"os"
"strings"
"time"
)
func runExample(eg InternalExample) (ok bool) {
if *chatty {
fmt.Printf("=== RUN %s\n", eg.Name)
}
// Capture stdout.
stdout := os.Stdout
w, err := tempFile("." + eg.Name + ".stdout.")
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
os.Stdout = w
start := time.Now()
ok = true
// Clean up in a deferred call so we can recover if the example panics.
defer func() {
dstr := fmtDuration(time.Now().Sub(start))
// Close file, restore stdout, get output.
w.Close()
os.Stdout = stdout
out, readFileErr := readFile(w.Name())
_ = os.Remove(w.Name())
if readFileErr != nil {
fmt.Fprintf(os.Stderr, "testing: reading stdout file: %v\n", readFileErr)
os.Exit(1)
}
var fail string
err := recover()
got := strings.TrimSpace(out)
want := strings.TrimSpace(eg.Output)
if eg.Unordered {
if sortLines(got) != sortLines(want) && err == nil {
fail = fmt.Sprintf("got:\n%s\nwant (unordered):\n%s\n", out, eg.Output)
}
} else {
if got != want && err == nil {
fail = fmt.Sprintf("got:\n%s\nwant:\n%s\n", got, want)
}
}
if fail != "" || err != nil {
fmt.Printf("--- FAIL: %s (%s)\n%s", eg.Name, dstr, fail)
ok = false
} else if *chatty {
fmt.Printf("--- PASS: %s (%s)\n", eg.Name, dstr)
}
if err != nil {
panic(err)
}
}()
// Run example.
eg.F()
return
}