Fix test removed invalid source test file

sign/pdfcatalog.go

@@ -30,7 +30,7 @@ func (context *SignContext) createCatalog() ([]byte, error) {
 	// If an incremental upgrade requires a version that is higher than specified by the document.
 	// Ensure PDF version is at least 1.5 to support SigFlags in acroFormDict (1.4) and UF in the fileSpecDict (1.5)
 	if v, err := strconv.ParseFloat(context.PDFReader.PDFVersion, 64); err == nil && v < 1.5 {
-		catalog_buffer.WriteString(" /Version /1.5")
+		catalog_buffer.WriteString("  /Version /1.5\n")
 	}
 
 	// Retrieve the root, its pointer and set the root string

sign/pdfcatalog_test.go

@@ -21,11 +21,11 @@ var testFiles = []struct {
 		},
 	},
 	{
-		file: "../testfiles/testfile21.pdf",
+		file: "../testfiles/testfile12.pdf",
 		expectedCatalogs: map[CertType]string{
-			CertificationSignature: "<<\n  /Type /Catalog\n  /Metadata 8 0 R\n  /Names 6 0 R\n  /Pages 9 0 R\n  /AcroForm <<\n    /Fields [16 0 R]\n    /SigFlags 3\n  >>\n>>\n",
-			UsageRightsSignature:   "<<\n  /Type /Catalog\n  /Metadata 8 0 R\n  /Names 6 0 R\n  /Pages 9 0 R\n  /AcroForm <<\n    /Fields [16 0 R]\n    /SigFlags 1\n  >>\n>>\n",
-			ApprovalSignature:      "<<\n  /Type /Catalog\n  /Metadata 8 0 R\n  /Names 6 0 R\n  /Pages 9 0 R\n  /AcroForm <<\n    /Fields [16 0 R]\n    /SigFlags 3\n  >>\n>>\n",
+			CertificationSignature: "<<\n  /Type /Catalog\n  /Version /1.5\n  /Outlines 2 0 R\n  /Pages 3 0 R\n  /AcroForm <<\n    /Fields [16 0 R]\n    /SigFlags 3\n  >>\n>>\n",
+			UsageRightsSignature:   "<<\n  /Type /Catalog\n  /Version /1.5\n  /Outlines 2 0 R\n  /Pages 3 0 R\n  /AcroForm <<\n    /Fields [16 0 R]\n    /SigFlags 1\n  >>\n>>\n",
+			ApprovalSignature:      "<<\n  /Type /Catalog\n  /Version /1.5\n  /Outlines 2 0 R\n  /Pages 3 0 R\n  /AcroForm <<\n    /Fields [16 0 R]\n    /SigFlags 3\n  >>\n>>\n",
 		},
 	},
 }

sign/pdfxref_test.go

@@ -20,7 +20,6 @@ func TestGetLastObjectIDFromXref(t *testing.T) {
 		{"testfile16.pdf", 567},
 		{"testfile17.pdf", 20},
 		{"testfile20.pdf", 10},
-		{"testfile21.pdf", 16},
 	}
 
 	for _, tc := range testCases {