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如何使用juint如何使用JUnit
package Currency;
import java.io.Serializable;
import java.util.Locale;
public class Currency implements Serializable {
private static final long serialVersionUID = 8228779577409316939L;
private final java.util.Currency javaCurrency;
private final String numericCode;
private final String currencySymbolOverride; // use to override the currency code in java.util.Currency
private final String description;
private final int hashCode;
private final int scale; // the number of sub-units of the currency (e.g. US dollars have 100 sub-units, or pennies)
// supported currency codes
private static final String CURRENCY_CODE_USD = "USD";
private static final String CURRENCY_CODE_HKD = "HKD";
private static final String CURRENCY_CODE_MYR = "MYR";
private static final String CURRENCY_SYMBOL_USD = "$";
private static final String CURRENCY_SYMBOL_HKD = "HK$";
private static final String CURRENCY_SYMBOL_RM = "RM";
// supported currencies
public final static Currency US_DOLLAR = new Currency(java.util.Currency.getInstance(CURRENCY_CODE_USD), "840", 100, "US dollar");
public final static Currency HK_DOLLAR = new Currency(java.util.Currency.getInstance(CURRENCY_CODE_HKD), "344", 100, "Hong Kong dollar");
public final static Currency MALAYSIAN_RINGGIT = new Currency(java.util.Currency.getInstance(CURRENCY_CODE_MYR), "348", 70, "Malaysian ringgit", CURRENCY_SYMBOL_RM);
/**
* default constructor was added to work with jaxb generation/conversion
*/
public Currency() {
javaCurrency = null;
numericCode = null;
currencySymbolOverride = null;
description = null;
hashCode = 0;
scale = 0;
}
/**
* Get a {@link Currency} by its ISO 4217 code
*
* @param pCurrencyCode
* @return the currency for the given code, or null if the code is not supported
*/
public static Currency getByCurrencyCode(String pCurrencyCode)
{
if (CURRENCY_CODE_USD.equalsIgnoreCase(pCurrencyCode)) {
return US_DOLLAR;
}
if (CURRENCY_CODE_HKD.equalsIgnoreCase(pCurrencyCode)) {
return HK_DOLLAR;
}
if (CURRENCY_CODE_MYR.equalsIgnoreCase(pCurrencyCode)) {
return MALAYSIAN_RINGGIT;
}
return null;
}
public static Currency getByCurrencyAbbreviationOrSymbol(String pCurrencyAbbreviationOrSymbol) {
if (CURRENCY_SYMBOL_USD.equalsIgnoreCase(pCurrencyAbbreviationOrSymbol)) {
return US_DOLLAR;
}
if (CURRENCY_SYMBOL_HKD.equalsIgnoreCase(pCurrencyAbbreviationOrSymbol))
{
return HK_DOLLAR;
}
if (CURRENCY_SYMBOL_RM.equalsIgnoreCase(pCurrencyAbbreviationOrSymbol))
{
return MALAYSIAN_RINGGIT;
}
return null;
}
/**
* Is the given currency code supported in the system?
*
* @param pCurrencyCode
* @return
*/
public static boolean isSupportedCurrencyCode(String pCurrencyCode)
{
return getByCurrencyCode(pCurrencyCode) != null;
}
/**
* Constructor to use the currency code from java.util.Currency
*
* @param pCurrency
* @param pNumericCode
* @param pScale
* @param pDescription
*/
private Currency(java.util.Currency pCurrency, String pNumericCode, int pScale, String pDescription)
{
this(pCurrency, pNumericCode, pScale, pDescription, null);
}
/**
* Constructor to override the currency code in java.util.Currency
*
* @param pCurrency
* @param pNumericCode
* @param pScale
* @param pDescription
* @param pCurrencySymbolOverride
*/
private Currency(java.util.Currency pCurrency, String pNumericCode, int pScale, String pDescription, String pCurrencySymbolOverride)
{
javaCurrency = pCurrency;
numericCode = pNumericCode;
description = pDescription;
hashCode = Integer.parseInt(numericCode);
scale = pScale;
currencySymbolOverride = pCurrencySymbolOverride;
}
public boolean equals(Object o)
{
if (this == o)
{
return true;
}
if (o == null || getClass() != o.getClass())
{
return false;
}
final Currency currency = (Currency) o;
return numericCode.equals(currency.numericCode);
}
public int hashCode()
{
return hashCode;
}
/**
* Gets the ISO 4217 currency code of this currency.
*
* @return the ISO 4217 currency code of this currency.
*/
public String getCurrencyCode()
{
return javaCurrency.getCurrencyCode();
}
/**
* Gets the symbol of this currency for the default locale.
* For example, for the US Dollar, the symbol is "$" if the default
* locale is the US, while for other locales it may be "US$". If no
* symbol can be determined, the ISO 4217 currency code is returned.
*
* @return the symbol of this currency for the default locale
*/
public String getSymbol()
{
return currencySymbolOverride == null ? javaCurrency.getSymbol() : currencySymbolOverride;
}
/**
* @return has the default currency symbol been overridden
*/
public boolean hasSymbolOverride()
{
return currencySymbolOverride != null;
}
/**
* Gets the symbol of this currency for the specified locale.
* For example, for the US Dollar, the symbol is "$" if the specified
* locale is the US, while for other locales it may be "US$". If no
* symbol can be determined, the ISO 4217 currency code is returned.
*
* @param locale the locale for which a display name for this currency is
* needed
* @return the symbol of this currency for the specified locale
* @throws NullPointerException if <code>locale</code> is null
*/
public String getSymbol(Locale locale)
{
return javaCurrency.getSymbol(locale);
}
/**
* Gets the three-digit numeric code for this currency.
*
* @return the three-digit numeric code for this currency.
*/
public String getNumericCode()
{
return numericCode;
}
/**
* @return the number of sub-units of the base currency
*/
public int getScale()
{
return scale;
}
/**
* Gets the description for this currency (i.e. "US dollar")
*
* @return the description for this currency.
*/
public String getDescription()
{
return description;
}
/**
* Gets the default number of fraction digits used with this currency.
* For example, the default number of fraction digits for the Euro is 2,
* while for the Japanese Yen it's 0.
* In the case of pseudo-currencies, such as IMF Special Drawing Rights,
* -1 is returned.
*
* @return the default number of fraction digits used with this currency
*/
public int getDefaultFractionDigits()
{
return javaCurrency.getDefaultFractionDigits();
}
/**
* Returns the ISO 4217 currency code of this currency.
*
* @return the ISO 4217 currency code of this currency
*/
public String toString()
{
return javaCurrency.toString();
}
public java.util.Currency getJavaCurrency()
{
return javaCurrency;
}
/**
* Creates a new instance, will only be used by Jaxb.
*/
public static Currency newInstance() {
return new Currency();
}
}
編輯測試getByCurrencyCode方法測試這個程序的公共方法：測試類是這樣的：
package Currency;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
public class CurrencyTest {
@Test
public void testGetByCurrencyCode() {
Currency c1= new Currency();
int result=c1.getByCurrencyCode(USD);
assertEquals(getByCurrencyCode,result);
}
}
不標註 –
你怎麼想執行測試運行？ – nullpointer
其實我正在用newclass製作一個新的測試包並導入這個包。病房後，我正在寫這個。 –