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package roaring
import (
"bytes"
"github.com/stretchr/testify/assert"
"testing"
)
func TestByteInputFlow(t *testing.T) {
t.Run("Test should be an error on empty data", func(t *testing.T) {
buf := bytes.NewBuffer([]byte{})
instances := []byteInput{
newByteInput(buf.Bytes()),
newByteInputFromReader(buf),
}
for _, input := range instances {
n, err := input.readUInt16()
assert.EqualValues(t, 0, n)
assert.Error(t, err)
p, err := input.readUInt32()
assert.EqualValues(t, 0, p)
assert.Error(t, err)
b, err := input.next(10)
assert.Nil(t, b)
assert.Error(t, err)
err = input.skipBytes(10)
assert.Error(t, err)
}
})
t.Run("Test on nonempty data", func(t *testing.T) {
buf := bytes.NewBuffer(uint16SliceAsByteSlice([]uint16{1, 10, 32, 66, 23}))
instances := []byteInput{
newByteInput(buf.Bytes()),
newByteInputFromReader(buf),
}
for _, input := range instances {
n, err := input.readUInt16()
assert.EqualValues(t, 1, n)
assert.NoError(t, err)
p, err := input.readUInt32()
assert.EqualValues(t, 2097162, p) // 32 << 16 | 10
assert.NoError(t, err)
b, err := input.next(2)
assert.EqualValues(t, []byte{66, 0}, b)
assert.NoError(t, err)
err = input.skipBytes(2)
assert.NoError(t, err)
b, err = input.next(1)
assert.Nil(t, b)
assert.Error(t, err)
}
})
}
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