vendor tsgo

tools/tsgo/internal/testutil/emittestutil/emittestutil.go

@@ -0,0 +1,29 @@
+package emittestutil
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/ast"
+	"github.com/microsoft/typescript-go/internal/core"
+	"github.com/microsoft/typescript-go/internal/printer"
+	"github.com/microsoft/typescript-go/internal/testutil/parsetestutil"
+	"gotest.tools/v3/assert"
+)
+
+// Checks that pretty-printing the given file matches the expected output.
+func CheckEmit(t *testing.T, emitContext *printer.EmitContext, file *ast.SourceFile, expected string) {
+	t.Helper()
+	printer := printer.NewPrinter(
+		printer.PrinterOptions{
+			NewLine: core.NewLineKindLF,
+		},
+		printer.PrintHandlers{},
+		emitContext,
+	)
+	text := printer.EmitSourceFile(file)
+	actual := strings.TrimSuffix(text, "\n")
+	assert.Equal(t, expected, actual)
+	file2 := parsetestutil.ParseTypeScript(text, file.LanguageVariant == core.LanguageVariantJSX)
+	parsetestutil.CheckDiagnosticsMessage(t, file2, "error on reparse: ")
+}