fix(series import): extract RUB when it's written in Russian.

Author: php-coder

src/main/java/ru/mystamps/web/feature/series/importing/SeriesInfoExtractorServiceImpl.java

@@ -64,6 +64,9 @@ public class SeriesInfoExtractorServiceImpl implements SeriesInfoExtractorServic
 	private static final Pattern MICHEL_NUMBERS_REGEXP =
 		Pattern.compile("#[ ]?(?<begin>[1-9][0-9]{0,3})-(?<end>[1-9][0-9]{0,3})");
 
+	// Regular expression that matches Rubles (Russian currency).
+	private static final Pattern RUB_CURRENCY_REGEXP = Pattern.compile("[0-9][ ]?руб");
+	
 	// CheckStyle: ignore LineLength for next 4 lines
 	private static final Pattern VALID_CATEGORY_NAME_EN = Pattern.compile(CategoryValidation.NAME_EN_REGEXP);
 	private static final Pattern VALID_CATEGORY_NAME_RU = Pattern.compile(CategoryValidation.NAME_RU_REGEXP);
@@ -394,10 +397,18 @@ public SeriesExtractedInfo extract(String pageUrl, RawParsedDataDto data) {
 			log.debug("Currency is {}", currency);
 			return currency.toString();
 
-		} catch (IllegalArgumentException ex) {
-			log.debug("Could not extract currency: {}", ex.getMessage());
-			return null;
+		} catch (IllegalArgumentException ignored) {
+		}
+		
+		Matcher matcher = RUB_CURRENCY_REGEXP.matcher(fragment);
+		if (matcher.find()) {
+			log.debug("Currency is RUB");
+			return Currency.RUB.toString();
 		}
+		
+		log.debug("Could not extract currency from a fragment");
+		
+		return null;
 	}
 
 	private Integer extractSellerByNameAndUrl(String name, String url) {

src/test/groovy/ru/mystamps/web/feature/series/importing/SeriesInfoExtractorServiceImplTest.groovy

@@ -611,16 +611,17 @@ class SeriesInfoExtractorServiceImplTest extends Specification {
 			result == null
 	}
 
-	def 'extractCurrency() should return null for unknown currency'() {
-		given:
-			String invalidCurrency = 'CAD'
-		when:
-			String result = service.extractCurrency(invalidCurrency)
-		then:
-			result == null
+	@Unroll
+	def 'extractCurrency() should return null for "#fragment"'(String fragment) {
+		expect:
+			service.extractCurrency(fragment) == null
+		where:
+			fragment | _
+			'CAD'    | _
+			'труб'   | _
 	}
 
-	def 'extractCurrency() should extract currency from a fragment'() {
+	def 'extractCurrency() should extract exactly specified currency'() {
 		given:
 			String validCurrency = Random.currency()
 		when:
@@ -629,4 +630,17 @@ class SeriesInfoExtractorServiceImplTest extends Specification {
 			result == validCurrency
 	}
 
+	@Unroll
+	def 'extractCurrency() should extract RUB currency from "#fragment"'(String fragment) {
+		expect:
+			service.extractCurrency(fragment) == 'RUB'
+		where:
+			fragment    | _
+			'1 рубль'   | _
+			'10 рублей' | _
+			'100 руб'   | _
+			'200руб'    | _
+			'660 руб.'  | _
+	}
+	
 }