diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.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>
\ No newline at end of file
diff --git a/src/test/kotlin/MoneyTests.kt b/src/test/kotlin/MoneyTests.kt
index 899c416..87e292f 100644
--- a/src/test/kotlin/MoneyTests.kt
+++ b/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)
     }
 }
\ No newline at end of file