From 3101bca17d013bd367c0d96d7e96e65ae18c6cce Mon Sep 17 00:00:00 2001
From: Sergey <sergey.bukharov@thoughtworks.com>
Date: Sat, 29 May 2021 14:28:55 +0800
Subject: [PATCH 1/2] revert to the begining

---
 src/main/kotlin/com/stringconcat/tdd/Dollar.kt     |  5 -----
 src/test/kotlin/com/stringconcat/com/DollarTest.kt | 14 --------------
 2 files changed, 19 deletions(-)
 delete mode 100644 src/main/kotlin/com/stringconcat/tdd/Dollar.kt
 delete mode 100644 src/test/kotlin/com/stringconcat/com/DollarTest.kt

diff --git a/src/main/kotlin/com/stringconcat/tdd/Dollar.kt b/src/main/kotlin/com/stringconcat/tdd/Dollar.kt
deleted file mode 100644
index e77bb26..0000000
--- a/src/main/kotlin/com/stringconcat/tdd/Dollar.kt
+++ /dev/null
@@ -1,5 +0,0 @@
-package com.stringconcat.tdd
-
-class Dollar(
-    val amount: Int
-)
diff --git a/src/test/kotlin/com/stringconcat/com/DollarTest.kt b/src/test/kotlin/com/stringconcat/com/DollarTest.kt
deleted file mode 100644
index 45783be..0000000
--- a/src/test/kotlin/com/stringconcat/com/DollarTest.kt
+++ /dev/null
@@ -1,14 +0,0 @@
-package com.stringconcat.com
-
-import com.stringconcat.tdd.Dollar
-import io.kotest.matchers.shouldBe
-import kotlin.test.Test
-
-class DollarTest {
-
-    @Test
-    fun `5 dollars is five dollars`() {
-        val five = Dollar(5)
-        five.amount shouldBe 5
-    }
-}
\ No newline at end of file

From 4db91651490a43b3514cdb3c6d6dd312c63bc79a Mon Sep 17 00:00:00 2001
From: Sergey <sergey.bukharov@thoughtworks.com>
Date: Sat, 28 Aug 2021 17:35:32 +0800
Subject: [PATCH 2/2] implement money for group 3

---
 src/main/kotlin/com/stringconcat/tdd/Money.kt | 39 +++++++++
 src/main/kotlin/com/stringconcat/tdd/main.kt  |  8 +-
 .../kotlin/com/stringconcat/tdd/MoneyTest.kt  | 83 +++++++++++++++++++
 3 files changed, 129 insertions(+), 1 deletion(-)
 create mode 100644 src/main/kotlin/com/stringconcat/tdd/Money.kt
 create mode 100644 src/test/kotlin/com/stringconcat/tdd/MoneyTest.kt

diff --git a/src/main/kotlin/com/stringconcat/tdd/Money.kt b/src/main/kotlin/com/stringconcat/tdd/Money.kt
new file mode 100644
index 0000000..78a5260
--- /dev/null
+++ b/src/main/kotlin/com/stringconcat/tdd/Money.kt
@@ -0,0 +1,39 @@
+package com.stringconcat.tdd
+
+open class Money(
+    val amount: Int,
+    val currency: Currency
+    ) {
+
+    override fun equals(other: Any?): Boolean {
+        if (other !is Money) return false
+        return this.currency == other.currency && this.amount == other.amount
+    }
+
+    operator fun times(multiplier: Int): Money {
+        return Money(amount * multiplier, this.currency)
+    }
+
+    operator fun plus(other: Money): Money {
+        return Money(this.amount + other.amount, this.currency)
+    }
+
+    override fun toString(): String {
+        return "Money(amount=$amount, currency=$currency)"
+    }
+
+    fun toFranc(): Money {
+        if (currency == Currency.CHF) return this
+        return Money(amount * 2, Currency.CHF)
+    }
+
+    companion object {
+        fun dollar(amount: Int) = Money(amount, Currency.USD)
+        fun franc(amount: Int) = Money(amount, Currency.CHF)
+    }
+
+    enum class Currency() {
+        USD, CHF
+    }
+
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/stringconcat/tdd/main.kt b/src/main/kotlin/com/stringconcat/tdd/main.kt
index a7a5e00..1cfe5c1 100644
--- a/src/main/kotlin/com/stringconcat/tdd/main.kt
+++ b/src/main/kotlin/com/stringconcat/tdd/main.kt
@@ -1,3 +1,9 @@
 fun main() {
     println("Hello World!")
-}
\ No newline at end of file
+}
+
+/*todo
+5 USD to CHF = 10 CHF
+rate???
+5 USD + 10 CHF = 10 USD if rate (2:1)
+ */
\ No newline at end of file
diff --git a/src/test/kotlin/com/stringconcat/tdd/MoneyTest.kt b/src/test/kotlin/com/stringconcat/tdd/MoneyTest.kt
new file mode 100644
index 0000000..2a2a9cb
--- /dev/null
+++ b/src/test/kotlin/com/stringconcat/tdd/MoneyTest.kt
@@ -0,0 +1,83 @@
+package com.stringconcat.tdd
+
+import io.kotest.matchers.shouldBe
+import io.kotest.matchers.shouldNotBe
+import org.junit.jupiter.api.Test
+
+internal class MoneyTest {
+
+    @Test
+    fun `5 CHF is equal to 5 CHF`() {
+        Money.franc(5) shouldBe Money.franc(5)
+    }
+
+    @Test
+    fun `5 CHF is NOT equal to 7 CHF`() {
+        Money.franc(5) shouldNotBe  Money.franc(7)
+    }
+
+    @Test
+    fun `No CHF is equal to null`() {
+        Money.franc(5).shouldNotBe(null)
+    }
+
+    @Test
+    fun `5 CHF multiply 2 should be 10 CHF`() {
+        Money.franc(5) * 2  shouldBe Money.franc(10)
+    }
+
+    @Test
+    fun `10 CHF multiply 3 should be 30 CHF`() {
+        Money.franc(10) * 3  shouldBe Money.franc(30)
+    }
+
+    @Test
+    fun `2 CHF + 2 CHF is 4 CHF`() {
+        Money.franc(2) + Money.franc(2) shouldBe Money.franc(4)
+    }
+
+    @Test
+    fun `5 USD is equal to 5 USD`() {
+        Money.dollar(5) shouldBe Money.dollar(5)
+    }
+
+    @Test
+    fun `5 USD is NOT equal to 7 USD`() {
+        Money.dollar(5) shouldNotBe Money.dollar(7)
+    }
+
+    @Test
+    fun `No dollar is equal to null`() {
+        Money.dollar(5).shouldNotBe(null)
+    }
+
+    @Test
+    fun `5 USD multiply 2 should be 10 USD`() {
+        Money.dollar(5) * 2  shouldBe Money.dollar(10)
+    }
+
+    @Test
+    fun `10 USD multiply 3 should be 30 USD`() {
+        Money.dollar(10) * 3  shouldBe Money.dollar(30)
+    }
+
+    @Test
+    fun `2 USD + 2 USD is 4 USD`() {
+        Money.dollar(2) + Money.dollar(2) shouldBe Money.dollar(4)
+    }
+
+    @Test
+    fun `2 USD is not equal 2 CHF`() {
+        Money.dollar(2) shouldNotBe Money.franc(2)
+    }
+
+    @Test
+    fun `5 USD to CHF is 10 CHF if rate 2 to 1`() {
+        Money.dollar(5).toFranc() shouldBe Money.franc(10)
+    }
+
+    @Test
+    fun `5 CHF to CHF is 5 CHF`() {
+        Money.franc(5).toFranc() shouldBe Money.franc(5)
+    }
+}
\ No newline at end of file