vendor tsgo

tools/tsgo/internal/scanner/scanner_test.go

@@ -0,0 +1,21 @@
+package scanner
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/ast"
+	"github.com/microsoft/typescript-go/internal/stringutil"
+	"gotest.tools/v3/assert"
+)
+
+func TestScanStringPreservesLoneSurrogates(t *testing.T) {
+	t.Parallel()
+	s := NewScanner()
+	s.SetText(`"🦀\ud7ff\ud800\ud801\uD83E\uDD80"`)
+	assert.Equal(t, s.Scan(), ast.KindStringLiteral)
+	assert.Equal(t, s.TokenValue(), "🦀"+
+		stringutil.EncodeJSStringRune(0xD7FF)+
+		stringutil.EncodeJSStringRune(0xD800)+
+		stringutil.EncodeJSStringRune(0xD801)+
+		"🦀")
+}