Add more functinos for money extension and fixed the curreny and object currency and default std money value and more

src/test/kotlin/MoneyTests.kt

@@ -5,13 +5,6 @@ import org.junit.Test
 class MoneyTests {
     @Test
     fun exchange_2usd_to_khr_test() {
-//        val properties = MoneyConfig
-//            .MoneyConfigProperties
-//            .MoneyConfigPropertiesBuilder()
-//            .setDeliEqual(':')
-//            .setDeliSplit(',')
-//            .build()
-
         applyMoneyConfig {
             setProperties(buildMoneyConfigProperties {
                 setDeliEqual(':')
@@ -26,11 +19,19 @@ class MoneyTests {
         // Is valid for money config?
         Assert.assertTrue(MoneyConfig.isValid())
 
-        val moneyUsd = Money(2.0)
-        val moneyKhr = MoneyExchangeUtils.exchange(moneyUsd, MoneyCurrency.create("KHR"))
+        // arithmetic operators calculation
+        val moneyUsd =
+            (2 withCurrency "usd") divideWith (2 withCurrency "usd") plusOf 1 minusOf 1 plusOf 1 multiplyOf 2 divideOf 2 divideWith (8000 withCurrency "khr") plusOf 1
+        val moneyKhr = moneyUsd exchangeTo "khr"
 
         // Is correct exchange?
         Assert.assertEquals(8000.0, moneyKhr.getMoneyValue(), 0.0)
+
+        // complex operators and exchanging
+        val sum =
+            ((moneyUsd + moneyKhr) * Money.TEN) exchangeTo MoneyCurrency.KHR minusWith (Money.ONE exchangeTo MoneyCurrency.KHR)
+
+        Assert.assertEquals(156000.0, sum.getMoneyValue(), 0.0)
     }
 
     object MyBatchRates {