Updated valid for money config

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

src/main/kotlin/com/cubetiqs/libra/moneyutils/MoneyConfig.kt

@@ -15,8 +15,11 @@ object MoneyConfig {
      * Value is the rate
      */
     private val config: MutableMap<String, Double> = mutableMapOf()
-    private var valid: Boolean = false
-    fun isValid() = valid
+
+    // validate the config, if have it's valid
+    fun isValid(): Boolean {
+        return this.config.isNotEmpty()
+    }
 
     /**
      * Money properties for money config format
@@ -58,9 +61,6 @@ object MoneyConfig {
                 throw MoneyCurrencyStateException("money config format is not valid!")
             }
         }
-
-        // validate the config is load or not
-        this.valid = this.config.isNotEmpty()
     }
 
     // all currencies with its rate

src/test/kotlin/MoneyTests.kt

@@ -9,13 +9,16 @@ import org.junit.Test
 
 class MoneyTests {
     @Test
-    fun test() {
+    fun money_operator_test() {
         val money = Money(10.0)
         val money2 = Money(20.0)
         money *= money
         println((money + money2) * money2)
-        Assert.assertEquals(10, 10)
+        Assert.assertEquals(100.0, money.value, 0.0)
+    }
 
+    @Test
+    fun exchange_2usd_to_khr_test() {
         val properties = MoneyConfig
             .MoneyConfigProperties
             .MoneyConfigPropertiesBuilder()
@@ -27,11 +30,13 @@ class MoneyTests {
             .setProperties(properties)
             .parse("USD:1,KHR:4000")
 
+        Assert.assertTrue(MoneyConfig.isValid())
+
         println(MoneyConfig.getConfig())
 
-        val moneyUsd = Money(10.0)
+        val moneyUsd = Money(2.0)
         val moneyKhr = MoneyExchangeUtils.exchange(moneyUsd, "KHR")
 
-        Assert.assertEquals(40000.0, moneyKhr.getMoneyValue(), 0.0)
+        Assert.assertEquals(8000.0, moneyKhr.getMoneyValue(), 0.0)
     }
 }