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go-buffers/limitedbuffer_test.go

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package buffers_test
import (
"github.com/reiver/go-buffers"
"testing"
)
func TestLimitedBuffer_oneByteAtATime(t *testing.T) {
tests := []struct{
Data string
Expected string
Limit int
}{
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "",
Limit: 0,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0",
Limit: 1,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "01",
Limit: 2,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "012",
Limit: 3,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123",
Limit: 4,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "01234",
Limit: 5,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "012345",
Limit: 6,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456",
Limit: 7,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "01234567",
Limit: 8,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "012345678",
Limit: 9,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789",
Limit: 10,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"A",
Limit: 11,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"AB",
Limit: 12,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABC",
Limit: 13,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCD",
Limit: 14,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDE",
Limit: 15,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXY",
Limit: 35,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ",
Limit: 36,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"a",
Limit: 37,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"ab",
Limit: 38,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abc",
Limit: 39,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvw",
Limit: 59,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwx",
Limit: 60,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxy",
Limit: 61,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Limit: 62,
},
}
loop: for testNumber, test := range tests {
{
var buffer buffers.Buffer = buffers.LimitedBuffer(test.Limit)
var i int
for i=0; i<test.Limit; i++ {
var b [1]byte
var p []byte = b[:]
b[0] = test.Data[i]
n, err := buffer.Write(p)
if nil != err {
t.Errorf("For test #%d, did not expect an error but actually got one,", testNumber)
t.Logf("ERROR: (%T) %q", err, err)
t.Logf("DATA: %q", test.Data)
t.Logf("EXPECTED-DATA: %q", test.Expected)
t.Logf("ACTUAL-DATA: %q", buffer.String())
t.Logf("LIMIT: %d", test.Limit)
continue loop
}
if expected, actual := 1, n; expected != actual {
t.Errorf("For test #%d, the actual number of bytes written is not what was expected.", testNumber)
t.Logf("EXPECTED: %d", expected)
t.Logf("ACTUAL: %d", actual)
t.Logf("DATA: %q", test.Data)
t.Logf("EXPECTED-DATA: %q", test.Expected)
t.Logf("ACTUAL-DATA: %q", buffer.String())
continue loop
}
}
{
var b [1]byte
var p []byte = b[:]
if len(test.Data) < i {
b[0] = test.Data[i]
} else {
b[0] = '?'
}
n, err := buffer.Write(p)
if nil == err {
t.Errorf("For test #%d, expected an error but did not actually get one,", testNumber)
t.Logf("ERROR: (%T) %q", err, err)
t.Logf("DATA: %q", test.Data)
t.Logf("EXPECTED-DATA: %q", test.Expected)
t.Logf("ACTUAL-DATA: %q", buffer.String())
t.Logf("LIMIT: %d", test.Limit)
continue loop
}
if buffers.BufferOverflow != err {
t.Errorf("For test #%d, expected a buffer-overflow error but actually got a different error.", testNumber)
t.Logf("ERROR: (%T) %q", err, err)
t.Logf("DATA: %q", test.Data)
t.Logf("EXPECTED-DATA: %q", test.Expected)
t.Logf("ACTUAL-DATA: %q", buffer.String())
t.Logf("LIMIT: %d", test.Limit)
continue loop
}
if expected, actual := 0, n; expected != actual {
t.Errorf("For test #%d, the actual number of bytes written is not what was expected.", testNumber)
t.Logf("EXPECTED: %d", expected)
t.Logf("ACTUAL: %d", actual)
t.Logf("DATA: %q", test.Data)
t.Logf("EXPECTED-DATA: %q", test.Expected)
t.Logf("ACTUAL-DATA: %q", buffer.String())
continue loop
}
}
{
var expected string = test.Expected
var actual string = buffer.String()
if expected != actual {
t.Errorf("For test #%d, the actual value in the buffer is not what was expected.", testNumber)
t.Logf("EXPECTED: %q", expected)
t.Logf("ACTUAL: %q", actual)
t.Logf("DATA: %q", test.Data)
t.Logf("LIMIT: %d", test.Limit)
continue loop
}
}
}
}
}
func TestLimitedBuffer_all(t *testing.T) {
tests := []struct{
Data string
Expected string
Limit int
}{
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "",
Limit: 0,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0",
Limit: 1,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "01",
Limit: 2,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "012",
Limit: 3,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123",
Limit: 4,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "01234",
Limit: 5,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "012345",
Limit: 6,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456",
Limit: 7,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "01234567",
Limit: 8,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "012345678",
Limit: 9,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789",
Limit: 10,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"A",
Limit: 11,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"AB",
Limit: 12,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABC",
Limit: 13,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCD",
Limit: 14,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDE",
Limit: 15,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXY",
Limit: 35,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ",
Limit: 36,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"a",
Limit: 37,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"ab",
Limit: 38,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abc",
Limit: 39,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvw",
Limit: 59,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwx",
Limit: 60,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxy",
Limit: 61,
},
{
Data: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Expected: "0123456789"+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"+"abcdefghijklmnopqrstuvwxyz",
Limit: 62,
},
}
loop: for testNumber, test := range tests {
var limit int = len(test.Expected)
var buffer buffers.Buffer = buffers.LimitedBuffer(limit)
n, err := buffer.Write([]byte(test.Expected))
if nil != err {
t.Errorf("For test #%d, did not expect an error but actually got one,", testNumber)
t.Logf("ERROR: (%T) %q", err, err)
t.Logf("DATA: %q", test.Data)
t.Logf("EXPECTED-DATA: %q", test.Expected)
t.Logf("ACTUAL-DATA: %q", buffer.String())
t.Logf("LIMIT: %d", test.Limit)
continue loop
}
if expected, actual := limit, n; expected != actual {
t.Errorf("For test #%d, the actual number of bytes written is not what was expected.", testNumber)
t.Logf("EXPECTED: %d", expected)
t.Logf("ACTUAL: %d", actual)
t.Logf("DATA: %q", test.Data)
t.Logf("EXPECTED-DATA: %q", test.Expected)
continue loop
}
{
var expected string = test.Expected
var actual string = buffer.String()
if expected != actual {
t.Errorf("For test #%d, the actual value in the buffer is not what was expected.", testNumber)
t.Logf("EXPECTED: %q", expected)
t.Logf("ACTUAL: %q", actual)
t.Logf("DATA: %q", test.Data)
t.Logf("LIMIT: %d", test.Limit)
continue loop
}
}
}
}
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