SeriesInfoExtractorServiceImpl.extractPrice(): add unit tests.

Fix #838

Author: php-coder

src/main/java/ru/mystamps/web/service/SeriesInfoExtractorServiceImpl.java

@@ -261,7 +261,6 @@ public Integer extractSeller(String name, String url) {
 		return null;
 	}
 
-	// @todo #695 SeriesInfoExtractorServiceImpl.extractPrice(): add unit tests
 	public BigDecimal extractPrice(String fragment) {
 		if (StringUtils.isBlank(fragment)) {
 			return null;

src/test/groovy/ru/mystamps/web/service/SeriesInfoExtractorServiceImplTest.groovy

@@ -309,6 +309,35 @@ class SeriesInfoExtractorServiceImplTest extends Specification {
 			'part of word2000' | _
 	}
 
+	//
+	// Tests for extractPrice()
+	//
+	
+	def 'extractPrice() should return null when fragment is null, empty or blank'() {
+		when:
+			BigDecimal result = service.extractPrice(nullOrBlank())
+		then:
+			result == null
+	}
+	
+	def 'extractPrice() should return null for invalid price'() {
+		given:
+			String invalidPrice = '20x'
+		when:
+			BigDecimal result = service.extractPrice(invalidPrice)
+		then:
+			result == null
+	}
+
+	def 'extractPrice() should extract price from a fragment'() {
+		given:
+			BigDecimal expectedPrice = Random.price()
+		when:
+			BigDecimal result = service.extractPrice(expectedPrice.toString())
+		then:
+			result == expectedPrice
+	}
+	
 	//
 	// Tests for extractCurrency()
 	//