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// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
package graphics
import (
"bytes"
"compress/zlib"
"encoding/base64"
"fmt"
"io"
"strings"
"testing"
"github.com/google/go-cmp/cmp"
"golang.org/x/exp/rand"
)
var _ = fmt.Print
func from_full_apc_escape_code(raw string) *GraphicsCommand {
return GraphicsCommandFromAPC([]byte(raw[2 : len(raw)-2]))
}
func TestGraphicsCommandSerialization(t *testing.T) {
gc := &GraphicsCommand{}
test_serialize := func(payload string, vals ...string) {
expected := "\033_G" + strings.Join(vals, ",")
if payload != "" {
expected += ";" + base64.RawStdEncoding.EncodeToString([]byte(payload))
}
expected += "\033\\"
if diff := cmp.Diff(expected, gc.AsAPC([]byte(payload))); diff != "" {
t.Fatalf("Failed to write vals: %#v with payload: %#v\n%s", vals, payload, diff)
}
}
test_chunked_payload := func(payload []byte) {
c := &GraphicsCommand{}
data := c.AsAPC([]byte(payload))
encoded := strings.Builder{}
compressed := false
is_first := true
for {
idx := strings.Index(data, "\033_")
if idx < 0 {
break
}
l := strings.Index(data, "\033\\")
apc := data[idx+2 : l]
data = data[l+2:]
g := GraphicsCommandFromAPC([]byte(apc))
if is_first {
compressed = g.Compression() != 0
is_first = false
}
encoded.WriteString(g.ResponseMessage())
if g.m == GRT_more_nomore {
break
}
}
if len(data) > 0 {
t.Fatalf("Unparsed remnant: %#v", string(data))
}
decoded, err := base64.RawStdEncoding.DecodeString(encoded.String())
if err != nil {
t.Fatalf("Encoded data not valid base-64 with error: %v", err)
}
if compressed {
b := bytes.Buffer{}
b.Write(decoded)
r, _ := zlib.NewReader(&b)
o := bytes.Buffer{}
if _, err = io.Copy(&o, r); err != nil {
t.Fatal(err)
}
r.Close()
decoded = o.Bytes()
}
if diff := cmp.Diff(payload, decoded); diff != "" {
t.Fatalf("Decoded payload does not match original\nlen decoded=%d len payload=%d", len(decoded), len(payload))
}
}
test_serialize("")
gc.SetTransmission(GRT_transmission_sharedmem).SetAction(GRT_action_query).SetZIndex(-3).SetWidth(33).SetImageId(11)
test_serialize("abcd", "a=q", "t=s", "w=33", "i=11", "z=-3")
q := from_full_apc_escape_code(gc.AsAPC([]byte("abcd")))
if diff := cmp.Diff(gc.AsAPC(nil), q.AsAPC(nil)); diff != "" {
t.Fatalf("Parsing failed:\n%s", diff)
}
if diff := cmp.Diff(q.response_message, base64.RawStdEncoding.EncodeToString([]byte("abcd"))); diff != "" {
t.Fatalf("Failed to parse payload:\n%s", diff)
}
test_chunked_payload([]byte("abcd"))
data := make([]byte, 8111)
_, _ = rand.Read(data)
test_chunked_payload(data)
test_chunked_payload([]byte(strings.Repeat("a", 8007)))
}
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