helper methods for Money.Ratio obtained from String and Int

api/xemantic-ai-money.api

@@ -5,6 +5,7 @@ public final class com/xemantic/ai/money/JvmMoney : com/xemantic/ai/money/Money
 	public fun hashCode ()I
 	public fun minus (Lcom/xemantic/ai/money/Money;)Lcom/xemantic/ai/money/Money;
 	public fun plus (Lcom/xemantic/ai/money/Money;)Lcom/xemantic/ai/money/Money;
+	public fun times (I)Lcom/xemantic/ai/money/Money;
 	public fun times (Lcom/xemantic/ai/money/Money$Ratio;)Lcom/xemantic/ai/money/Money;
 	public fun times (Lcom/xemantic/ai/money/Money;)Lcom/xemantic/ai/money/Money;
 	public fun toString ()Ljava/lang/String;
@@ -16,13 +17,15 @@ public final class com/xemantic/ai/money/JvmMoneyKt {
 	public static final fun getONE (Lcom/xemantic/ai/money/Money$Companion;)Lcom/xemantic/ai/money/Money;
 	public static final fun getONE (Lcom/xemantic/ai/money/Money$Ratio$Companion;)Lcom/xemantic/ai/money/Money$Ratio;
 	public static final fun getZERO (Lcom/xemantic/ai/money/Money$Companion;)Lcom/xemantic/ai/money/Money;
+	public static final fun toMoneyRatio (I)Lcom/xemantic/ai/money/Money$Ratio;
 }
 
 public abstract interface class com/xemantic/ai/money/Money {
 	public static final field Companion Lcom/xemantic/ai/money/Money$Companion;
 	public abstract fun compareTo (Lcom/xemantic/ai/money/Money;)I
 	public abstract fun minus (Lcom/xemantic/ai/money/Money;)Lcom/xemantic/ai/money/Money;
 	public abstract fun plus (Lcom/xemantic/ai/money/Money;)Lcom/xemantic/ai/money/Money;
+	public abstract fun times (I)Lcom/xemantic/ai/money/Money;
 	public abstract fun times (Lcom/xemantic/ai/money/Money$Ratio;)Lcom/xemantic/ai/money/Money;
 	public abstract fun times (Lcom/xemantic/ai/money/Money;)Lcom/xemantic/ai/money/Money;
 }
@@ -31,6 +34,10 @@ public final class com/xemantic/ai/money/Money$Companion {
 	public final fun serializer ()Lkotlinx/serialization/KSerializer;
 }
 
+public final class com/xemantic/ai/money/Money$DefaultImpls {
+	public static fun times (Lcom/xemantic/ai/money/Money;I)Lcom/xemantic/ai/money/Money;
+}
+
 public abstract interface class com/xemantic/ai/money/Money$Ratio {
 	public static final field Companion Lcom/xemantic/ai/money/Money$Ratio$Companion;
 	public abstract fun times (Lcom/xemantic/ai/money/Money;)Lcom/xemantic/ai/money/Money;
@@ -40,6 +47,11 @@ public final class com/xemantic/ai/money/Money$Ratio$Companion {
 	public final fun serializer ()Lkotlinx/serialization/KSerializer;
 }
 
+public final class com/xemantic/ai/money/MoneyKt {
+	public static final fun getMoneyRatio (Ljava/lang/String;)Lcom/xemantic/ai/money/Money$Ratio;
+	public static final fun times (ILcom/xemantic/ai/money/Money;)Lcom/xemantic/ai/money/Money;
+}
+
 public final class com/xemantic/ai/money/serialization/MoneyRatioSerializer : kotlinx/serialization/KSerializer {
 	public static final field INSTANCE Lcom/xemantic/ai/money/serialization/MoneyRatioSerializer;
 	public fun deserialize (Lkotlinx/serialization/encoding/Decoder;)Lcom/xemantic/ai/money/Money$Ratio;

src/commonMain/kotlin/Money.kt

@@ -51,6 +51,10 @@ public interface Money {
 
   public operator fun times(ratio: Ratio): Money
 
+  public operator fun times(
+    scalar: Int
+  ): Money = this * scalar.toMoneyRatio()
+
   public operator fun compareTo(money: Money): Int
 
   /**
@@ -80,3 +84,8 @@ public expect fun Money.Companion.Ratio(value: String): Money.Ratio
 
 public expect val Money.Ratio.Companion.ONE: Money.Ratio
 
+public val String.moneyRatio get() = Money.Ratio(this)
+
+public expect fun Int.toMoneyRatio(): Money.Ratio
+
+public operator fun Int.times(money: Money): Money = toMoneyRatio().times(money)

src/commonTest/kotlin/MoneyRatioTest.kt

@@ -18,6 +18,7 @@ package com.xemantic.ai.money
 
 import com.xemantic.ai.money.test.shouldBe
 import kotlin.test.Test
+import kotlin.test.assertFailsWith
 
 class MoneyRatioTest {
 
@@ -26,6 +27,13 @@ class MoneyRatioTest {
     Money.Ratio("1.25").toString() shouldBe "1.25"
   }
 
+  @Test
+  fun `Should not create Money Ratio instance from invalid String`() {
+    assertFailsWith<NumberFormatException> {
+      Money.Ratio("foo")
+    }
+  }
+
   @Test
   fun `Should create Money Ratio instance with long fractional part`() {
     Money.Ratio("0.0000001").toString() shouldBe "0.0000001"
@@ -43,4 +51,22 @@ class MoneyRatioTest {
     Money.Ratio("0.000001") * Money("3.0") shouldBe Money("0.000003")
   }
 
+  @Test
+  fun `Should convert valid string to Money Ratio`() {
+    "0.000001".moneyRatio shouldBe Money.Ratio("0.000001")
+  }
+
+  @Test
+  fun `Should not convert invalid string to Money Ratio`() {
+    assertFailsWith<NumberFormatException> {
+      "foo".moneyRatio
+    }
+  }
+
+  @Test
+  fun `Should convert Int to Money Ratio`() {
+    1.toMoneyRatio() shouldBe Money.Ratio("1")
+    42.toMoneyRatio() shouldBe Money.Ratio("42")
+  }
+
 }

src/commonTest/kotlin/MoneyTest.kt

@@ -18,6 +18,7 @@ package com.xemantic.ai.money
 
 import com.xemantic.ai.money.test.shouldBe
 import kotlin.test.Test
+import kotlin.test.assertFailsWith
 
 class MoneyTest {
 
@@ -26,6 +27,13 @@ class MoneyTest {
     Money("42.50").toString() shouldBe "42.5"
   }
 
+  @Test
+  fun `Should not create Money instance from invalid String`() {
+    assertFailsWith<NumberFormatException> {
+      Money.Ratio("foo")
+    }
+  }
+
   @Test
   fun `Should create Money instance with long fractional part`() {
     Money("42.123456789").toString() shouldBe "42.123456789"
@@ -84,4 +92,14 @@ class MoneyTest {
     (money3 < money1) shouldBe false
   }
 
+  @Test
+  fun `Should multiply Int and Money`() {
+    2 * Money("2.25") shouldBe Money("4.5")
+  }
+
+  @Test
+  fun `Should multiply Money and Int`() {
+    Money("2.25") * 2 shouldBe Money("4.5")
+  }
+
 }

src/jvmMain/kotlin/JvmMoney.kt

@@ -98,3 +98,6 @@ public actual fun Money.Companion.Ratio(
 @Suppress("ObjectPropertyName")
 private val _RATIO_ONE = JvmMoney.JvmRatio(BigDecimal.ONE)
 public actual val Money.Ratio.Companion.ONE: Money.Ratio get() = _RATIO_ONE
+
+public actual fun Int.toMoneyRatio(): Money.Ratio =
+  JvmMoney.JvmRatio(BigDecimal(this))

src/nonJvmMain/kotlin/NonJvmMoney.kt

@@ -33,7 +33,7 @@ public class NonJvmMoney(private val value: BigDecimal) : Money {
   )
 
   override fun times(ratio: Money.Ratio): Money = NonJvmMoney(
-    (value * (ratio as NativeRatio).value)
+    (value * (ratio as NonJvmRatio).value)
   )
 
   override fun compareTo(
@@ -52,7 +52,7 @@ public class NonJvmMoney(private val value: BigDecimal) : Money {
 
   override fun hashCode(): Int = value.hashCode()
 
-  internal class NativeRatio(internal val value: BigDecimal) : Money.Ratio {
+  internal class NonJvmRatio(internal val value: BigDecimal) : Money.Ratio {
 
     override fun times(amount: Money): Money = NonJvmMoney(
       (value * (amount as NonJvmMoney).value)
@@ -65,7 +65,7 @@ public class NonJvmMoney(private val value: BigDecimal) : Money {
     override fun equals(
       other: Any?
     ): Boolean = (other != null)
-        && (other is NativeRatio)
+        && (other is NonJvmRatio)
         && (value == other.value)
 
     override fun hashCode(): Int = value.hashCode()
@@ -88,10 +88,13 @@ public actual val Money.Companion.ONE: Money get() = _ONE
 
 public actual fun Money.Companion.Ratio(
   value: String
-): Money.Ratio = NonJvmMoney.NativeRatio(
+): Money.Ratio = NonJvmMoney.NonJvmRatio(
   BigDecimal.parseString(value)
 )
 
 @Suppress("ObjectPropertyName")
-private val _RATIO_ONE = NonJvmMoney.NativeRatio(BigDecimal.ONE)
+private val _RATIO_ONE = NonJvmMoney.NonJvmRatio(BigDecimal.ONE)
 public actual val Money.Ratio.Companion.ONE: Money.Ratio get() = _RATIO_ONE
+
+public actual fun Int.toMoneyRatio(): Money.Ratio =
+  NonJvmMoney.NonJvmRatio(BigDecimal.fromInt(this))