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package build
import (
"bytes"
"errors"
"fmt"
"log"
"testing"
"github.com/mmcloughlin/avo/src"
)
func TestLogErrorNil(t *testing.T) {
var buf bytes.Buffer
l := log.New(&buf, "prefix: ", 0)
LogError(l, nil, 0)
if buf.String() != "" {
t.Fatalf("should print nothing for nil error")
}
}
func TestLogErrorNonErrorList(t *testing.T) {
var buf bytes.Buffer
l := log.New(&buf, "prefix: ", 0)
err := errors.New("not an ErrorList")
LogError(l, err, 0)
got := buf.String()
expect := "prefix: " + err.Error() + "\n"
if got != expect {
t.Fatalf("got\t%q\nexpect\t%q\n", got, expect)
}
}
func TestLogErrorList(t *testing.T) {
var buf bytes.Buffer
l := log.New(&buf, "prefix: ", 0)
e := ErrorList{}
filename := "asm.go"
err := errors.New("some kind of error")
n := 7
for i := 1; i <= n; i++ {
p := src.Position{Filename: filename, Line: i}
e.AddAt(p, err)
}
expect := ""
// Unlimited print.
LogError(l, e, 0)
for i := 1; i <= n; i++ {
expect += fmt.Sprintf("prefix: %s:%d: some kind of error\n", filename, i)
}
// Max equal to number of errors.
LogError(l, e, n)
for i := 1; i <= n; i++ {
expect += fmt.Sprintf("prefix: %s:%d: some kind of error\n", filename, i)
}
// Max less than number of errors.
m := n / 2
LogError(l, e, m)
for i := 1; i <= m; i++ {
expect += fmt.Sprintf("prefix: %s:%d: some kind of error\n", filename, i)
}
expect += "prefix: too many errors\n"
got := buf.String()
if got != expect {
t.Fatalf("got\n%s\nexpect\n%s\n", got, expect)
}
}
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