meta: add a command to be used for testing

It opens, reads and writes a file out. This
is to be used for testing random docx/xlsx files
to ensure we don't break them.

cmd/test-open-write/main.go

@@ -0,0 +1,52 @@
+// Copyright 2017 Baliance. All rights reserved.
+//
+// Use of this source code is governed by the terms of the Affero GNU General
+// Public License version 3.0 as published by the Free Software Foundation and
+// appearing in the file LICENSE included in the packaging of this file. A
+// commercial license can be purchased by contacting sales@baliance.com.
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"baliance.com/gooxml/document"
+	"baliance.com/gooxml/spreadsheet"
+)
+
+func main() {
+	flag.Parse()
+	if flag.NArg() == 0 {
+		fmt.Println("usage: test-open-write filename.docx/.xlsx")
+		os.Exit(1)
+	}
+	fn := flag.Arg(0)
+	if strings.HasSuffix(strings.ToLower(fn), ".xlsx") {
+		xlsx, err := spreadsheet.Open(fn)
+		if err != nil {
+			log.Fatalf("error opening %s: %s", fn, err)
+		}
+		if err := xlsx.Validate(); err != nil {
+			log.Printf("validation error: %s", err)
+		}
+		if err := xlsx.SaveToFile("converted.xlsx"); err != nil {
+			log.Fatalf("error saving: %s", err)
+		}
+	} else if strings.HasSuffix(strings.ToLower(fn), ".docx") {
+		docx, err := document.Open(fn)
+		if err != nil {
+			log.Fatalf("error opening %s: %s", fn, err)
+		}
+		if err := docx.Validate(); err != nil {
+			log.Printf("validation error: %s", err)
+		}
+		if err := docx.SaveToFile("converted.docx"); err != nil {
+			log.Fatalf("error saving: %s", err)
+		}
+	}
+	fmt.Println("reading", fn)
+}