Make use of hex string instead of FDB printable to remove test failures because of special characters (#2405)

Author: johscheuer

e2e/fixtures/status.go

@@ -533,7 +533,7 @@ func (fdbCluster *FdbCluster) GetCommandlineForProcessesPerClassWithStatus(
 }
 
 // FdbPrintable copied from foundationdb bindings/go/src/fdb/fdb.go func Printable(d []byte) string
-// Printable returns a human readable version of a byte array. The bytes that correspond with
+// Printable returns a human-readable version of a byte array. The bytes that correspond with
 // ASCII printable characters [32-127) are passed through. Other bytes are
 // replaced with \x followed by a two character zero-padded hex code for byte.
 func FdbPrintable(d []byte) string {
@@ -554,6 +554,21 @@ func FdbPrintable(d []byte) string {
 	return buf.String()
 }
 
+// FdbHexString returns a string where bytes are replaced with \x followed by a two character zero-padded hex code for byte.
+func FdbHexString(d []byte) string {
+	buf := new(bytes.Buffer)
+	for _, b := range d {
+		if b == '\\' {
+			buf.WriteString("\\\\")
+			continue
+		}
+
+		_, _ = fmt.Fprintf(buf, "\\x%02x", b)
+	}
+
+	return buf.String()
+}
+
 // FdbStrinc returns the first key that would sort outside the range prefixed by
 // // prefix, or an error if prefix is empty or contains only 0xFF bytes.
 // Copied from foundationdb bindings/go/src/fdb/range.go func Strinc(prefix []byte) ([]byte, error)

e2e/test_operator/operator_test.go

@@ -1944,7 +1944,7 @@ var _ = Describe("Operator", Label("e2e", "pr"), func() {
 				cmd := fmt.Sprintf(
 					"writemode on; option on ACCESS_SYSTEM_KEYS; set %s %s",
 					fixtures.FdbPrintable([]byte(key)),
-					fixtures.FdbPrintable(timestampByteBuffer.Bytes()),
+					fixtures.FdbHexString(timestampByteBuffer.Bytes()),
 				)
 				_, _, err := fdbCluster.RunFdbCliCommandInOperatorWithoutRetry(cmd, true, 20)