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|
package rope
import (
"bytes"
"io"
"testing"
"github.com/bruth/assert"
)
var readerTests []struct {
r node
want string
}
func init() {
defer disableCoalesce()()
readerTests = []struct {
r node
want string
}{
{
r: leaf("abc"),
want: "abc",
},
{
r: conc(leaf("abc"), leaf("def"), 0, 0),
want: "abcdef",
},
{
r: conc(conc(leaf("abc"), leaf("123"), 0, 0), leaf("def"), 0, 0),
want: "abc123def",
},
}
}
func TestReader(t *testing.T) {
buf := bytes.NewBuffer(nil)
for _, test := range readerTests {
buf.Reset()
_, _ = io.Copy(buf, NewReader(Rope{test.r}))
assert.Equal(t, test.want, buf.String())
}
}
func TestShortRead(t *testing.T) {
var result []byte
var buf [2]byte
for _, test := range readerTests {
result = result[:0]
var (
r = NewReader(Rope{test.r})
n int
err error
)
for err == nil {
n, err = r.Read(buf[:])
if err == nil {
assert.NotEqual(t, n, 0, "Zero-length Read()")
}
result = append(result, buf[:n]...)
}
assert.Equal(t, test.want, string(result))
assert.Equal(t, err, io.EOF, "Non-EOF error: "+err.Error())
}
}
func TestFullRead(t *testing.T) {
var buf [9]byte // Big enough for all the test strings. Exactly right size for one of them.
for _, test := range readerTests {
r := NewReader(Rope{test.r})
n, err := r.Read(buf[:])
assert.Equal(t, n, len(test.want), "partial read")
assert.Equal(t, err, io.EOF, "no immediate EOF")
assert.Equal(t, test.want, string(buf[:n]), "wrong data")
}
}
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