Update tests

Author: RafaelKayumov

WooCommerce/WooCommerceTests/ViewRelated/Shipping Label/WooShipping Create Shipping Labels/WooShipping Customs/WooShippingCustomsItemViewModelTests.swift

@@ -110,7 +110,7 @@ final class WooShippingCustomsItemViewModelTests: XCTestCase {
         XCTAssertEqual(viewModel.hsTariffNumberTotalValue?.1, Decimal(string: viewModel.valuePerUnit)! * 2)
     }
 
-    func test_isNumberValid_withValidNumbers() {
+    func test_isNumberValid_whenGivenValidTariffNumbers_shouldReturnTrue() {
         XCTAssertTrue(HSTariffNumberValidator.isNumberValid("123456"))
         XCTAssertTrue(HSTariffNumberValidator.isNumberValid("12.34.56"))
         XCTAssertTrue(HSTariffNumberValidator.isNumberValid("12.34.56.78"))
@@ -121,7 +121,7 @@ final class WooShippingCustomsItemViewModelTests: XCTestCase {
         XCTAssertTrue(HSTariffNumberValidator.isNumberValid("1.2.3.4.5.6"))
     }
 
-    func test_isNumberValid_withInvalidNumbers() {
+    func test_isNumberValid_whenGivenInvalidTariffNumbers_shouldReturnFalse() {
         // Less than 6 digits
         XCTAssertFalse(HSTariffNumberValidator.isNumberValid("12345"))
         XCTAssertFalse(HSTariffNumberValidator.isNumberValid("12.34.5"))
@@ -138,4 +138,12 @@ final class WooShippingCustomsItemViewModelTests: XCTestCase {
         XCTAssertFalse(HSTariffNumberValidator.isNumberValid("12.34..56"))
         XCTAssertFalse(HSTariffNumberValidator.isNumberValid(".123456"))
     }
+
+    func test_hsTariffNumber_sanitize_whenGivenStringWithNonDigits_shouldReturnOnlyDigits() {
+        XCTAssertEqual(HSTariffNumberValidator.sanitize("12.34.56"), "123456")
+        XCTAssertEqual(HSTariffNumberValidator.sanitize("12a34b56c"), "123456")
+        XCTAssertEqual(HSTariffNumberValidator.sanitize("...123---456..."), "123456")
+        XCTAssertEqual(HSTariffNumberValidator.sanitize("123456"), "123456")
+        XCTAssertEqual(HSTariffNumberValidator.sanitize(""), "")
+    }
 }