Code refactor and numeric support

tests/telepen_blackbox_1_test_case.rs

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-use rxing::{oned::TelepenReader, BarcodeFormat};
+use rxing::{oned::TelepenReader, BarcodeFormat, oned::TelepenCommon};
 
 mod common;
 
@@ -22,7 +22,7 @@ mod common;
  * @author Chris Wood
  */
 #[test]
-fn telepen_black_box1_test_case() {
+fn telepen_alpha_test_case() {
     const NUMTESTS: u32 = 5;
 
     let mut tester = common::AbstractBlackBoxTestCase::new(
@@ -36,3 +36,46 @@ fn telepen_black_box1_test_case() {
 
     tester.test_black_box();
 }
+
+#[test]
+fn telepen_numeric_test_case() {
+    let mut tester = common::AbstractBlackBoxTestCase::new(
+        "test_resources/blackbox/telepen-2",
+        TelepenReader::new(),
+        BarcodeFormat::TELEPEN,
+    );
+
+    tester.add_test_complex(1, 1, 0, 0, 0.0);
+    tester.add_hint(rxing::DecodeHintType::TELEPEN_AS_NUMERIC, rxing::DecodeHintValue::TelepenAsNumeric(true));
+    tester.ignore_pure = true;
+
+    tester.test_black_box();
+}
+
+#[test]
+fn telepen_checksum_test1() {
+    let contents = "Hello world!";
+    let checksum = TelepenCommon::calculate_checksum(contents);
+    assert_eq!('\u{1a}', checksum);
+}
+
+#[test]
+fn telepen_checksum_test2() {
+    let contents = "ABC123456";
+    let checksum = TelepenCommon::calculate_checksum(contents);
+    assert_eq!('\u{1}', checksum);
+}
+
+#[test]
+fn telepen_alpha_to_numeric_test() {
+    let ascii = "'=Siu";
+    let result = TelepenCommon::ascii_to_numeric(ascii);
+    assert_eq!("1234567890", result);
+}
+
+#[test]
+fn telepen_numeric_to_ascii_test() {
+    let numeric = "1234567890";
+    let result = TelepenCommon::numeric_to_ascii(numeric).unwrap();
+    assert_eq!("'=Siu", result);
+}