JsoupSiteParser.extractCurrency(): add unit tests.

Fix #844

Author: php-coder

src/main/java/ru/mystamps/web/util/extractor/JsoupSiteParser.java

@@ -282,7 +282,6 @@ protected String extractPrice(Element body) {
 		return price;
 	}
 
-	// @todo #695 JsoupSiteParser.extractCurrency(): add unit tests
 	protected String extractCurrency(Element body) {
 		if (currencyValue == null) {
 			return null;

src/test/java/ru/mystamps/web/util/extractor/JsoupSiteParserTest.java

@@ -863,6 +863,29 @@ public void extractPriceShouldReturnTextOfPriceLocator() {
 		assertThat(msg, price, equalTo(expectedValue));
 	}
 
+	//
+	// Tests for extractCurrency()
+	//
+	
+	@Test
+	public void extractCurrencyShouldReturnNullWhenCurrencyValueIsNotSet() {
+		parser.setCurrencyValue(null);
+		
+		String currency = parser.extractCurrency(null);
+		
+		assertThat(currency, is(nullValue()));
+	}
+	
+	@Test
+	public void extractCurrencyShouldReturnCurrencyValue() {
+		String expectedCurrency = Random.currency().toString();
+		parser.setCurrencyValue(expectedCurrency);
+		
+		String currency = parser.extractCurrency(null);
+		
+		assertThat(currency, equalTo(expectedCurrency));
+	}
+	
 	private static String describe(JsoupSiteParser parser) {
 		StringBuilder sb = new StringBuilder();
 		sb.append("JsoupSiteParser[name=")