/
reader_test.go
45 lines (40 loc) · 1.17 KB
/
reader_test.go
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package main
import (
"bytes"
"testing"
"testing/iotest"
)
func TestAllZeros(t *testing.T) {
for _, s := range []int{0, 1, 10, 1e3, 1e6, 10e6} {
n, err := ReadZeros(bytes.NewReader(make([]byte, s)))
if err != nil || n != s {
t.Errorf("expected %d (<nil>), got %d (%v)", s, n, err)
}
}
}
func TestNonZero(t *testing.T) {
for _, s := range []int{0, 1, 10, 1e3, 1e6, 10e6} {
b := make([]byte, s+10) // add 10 so we'll leave some zeros at the end
b[s] = 1 // set s-th byte to non-zero
n, err := ReadZeros(bytes.NewReader(b))
if err != errNonZeroByte || n != s {
t.Errorf("expected %d (errNonZeroByte), got %d (%v)", s, n, err)
}
}
}
func TestOneByteReader(t *testing.T) {
s := int(1e6)
n, err := ReadZeros(iotest.OneByteReader(bytes.NewReader(make([]byte, s))))
if err != nil || n != s {
t.Errorf("expected %d (<nil>), got %d (%v)", s, n, err)
}
}
func TestReadError(t *testing.T) {
s := int(1e6)
n, err := ReadZeros(iotest.TimeoutReader(bytes.NewReader(make([]byte, s))))
// first read should be 512 bytes
expected := 512
if err != iotest.ErrTimeout || n != expected {
t.Errorf("expected %d (timeout), got %d (%v)", expected, n, err)
}
}