Add a codex app-server client with generated types and contract tests

internal/codex/badline_internal_test.go

@@ -0,0 +1,53 @@
+package codex
+
+import (
+	"io"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestBadLines(t *testing.T) {
+	bad := []string{}
+	input := strings.Join([]string{
+		`{"method":"turn/started","params":{"threadId":"t","turn":{"id":"u","items":[],"status":"inProgress"}}}`,
+		``,
+		`warning: something on stdout`,
+		`{"method":"turn/started",`,
+		`{"method":"mystery/event","params":{}}`,
+		`{"method":"turn/completed","params":{"threadId":"t","turn":{"id":"u","items":[],"status":"completed"}}}`,
+	}, "\n")
+
+	before := time.Now()
+	r, w := io.Pipe()
+	s := newSession(Options{OnBadLine: func(line []byte, reason string) {
+		bad = append(bad, string(line)+" | "+reason)
+	}}, w, strings.NewReader(input))
+
+	methods := []string{}
+	for ev := range s.events {
+		methods = append(methods, ev.Method)
+	}
+	r.Close()
+
+	want := []string{
+		`warning: something on stdout | not a JSON object`,
+		`{"method":"turn/started", | unexpected end of JSON input`,
+		`{"method":"mystery/event","params":{}} | unrecognised method "mystery/event"`,
+	}
+	if strings.Join(bad, "\n") != strings.Join(want, "\n") {
+		t.Errorf("bad lines:\n%s\nwant:\n%s", strings.Join(bad, "\n"), strings.Join(want, "\n"))
+	}
+	if strings.Join(methods, ",") != "turn/started,mystery/event,turn/completed" {
+		t.Errorf("events = %v", methods)
+	}
+	if s.TurnID() != "" {
+		t.Errorf("turn %q still tracked after turn/completed", s.TurnID())
+	}
+	if s.LastLine().Before(before) {
+		t.Errorf("last line time %v not updated", s.LastLine())
+	}
+	if !s.Exited() {
+		t.Errorf("session not exited after stdout closed")
+	}
+}