Update README.md

README.md

@@ -3,3 +3,137 @@
 - Exchangeable for different currencies with custom override
 - Add money config able to custom by set of config
 - So on.
+
+### Example (Tests)
+```kotlin
+import com.cubetiqs.money.*
+import org.junit.Assert
+import org.junit.Test
+import java.util.*
+
+class MoneyTests {
+    private fun initMoneyConfig() {
+        applyMoneyConfig {
+            setProperties(buildMoneyConfigProperties {
+                setDeliEqual(':')
+                setDeliSplit(',')
+            })
+
+            fromJsonRates(MyBatchRates.getJsonRates())
+        }
+    }
+
+    object MyBatchRates {
+        fun getJsonRates(): String {
+            return """
+                {"USD": 1.0,"KHR": 4000.0, "eur": 0.5}
+            """.trimIndent()
+        }
+    }
+
+    @Test
+    fun exchange_2usd_to_khr_test() {
+        initMoneyConfig()
+
+        // Is valid for money config?
+        Assert.assertTrue(MoneyConfig.isConfigRatesValid())
+
+        // 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.getValue(), 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.getValue(), 0.0)
+    }
+
+    @Test
+    fun moneyGenerator() {
+        initMoneyConfig()
+
+        val moneyGen = MoneyObject(
+            value = 1.0,
+            currency = "usd",
+            operator = MoneyObject.MoneyOperator.PLUS,
+            with = MoneyObject(
+                value = 8000.0,
+                currency = "khr",
+                operator = MoneyObject.MoneyOperator.MINUS,
+                with = MoneyObject(
+                    value = 1000.0,
+                    currency = "khr",
+                )
+            )
+        )
+
+        val result = moneyGen.compute()
+        Assert.assertEquals(2.75, result.getValue(), 0.0)
+    }
+
+    @Test
+    fun moneyGeneratorBuilder() {
+        initMoneyConfig()
+
+        val expected = 72000.0
+
+        val builder = MoneyObject.builder()
+            .with(10.0, "usd", '+')
+            .with(1.5, "eur", '+')
+            .with(8000.0, "khr")
+            .with(10000.0, "khr")
+            .with(2000.0, "khr")
+            .with(.5, "eur", '-')
+            .with(1.0, "usd")
+            .withCurrency("khr")
+            .build()
+
+        val result = builder.compute()
+        Assert.assertEquals(expected, result.getValue(), 0.0)
+    }
+
+    @Test
+    fun moneyGeneratorBuilderWithStringValues() {
+        initMoneyConfig()
+
+        val values = "usd:1:+,khr:4000:-,usd:1:+,eur:1:+" // result = 3
+        val expected1 = 3.0
+        val expected2 = 3.5
+
+        val builder = MoneyObject.builder()
+            .withCurrency("usd")
+            .with(1.0, "usd", '-')
+            .with(4000.0, "khr")
+            .with(1.0, "usd")
+            .with(1.0, "usd")
+            .with(1.0, "usd")
+            .with(1.0, "usd")
+            .with(1.0, "eur", '-') // 2 usd
+            .with(1.0, "usd")
+            .with(2.0, "usd", '/')
+            .with(2.0, "usd")
+            .build() // 3.5
+
+        val result1 = MoneyObject.builder()
+            .parseFromString(values)
+            .withCurrency("usd")
+            .build()
+            .compute()
+        val result2 = builder.compute()
+
+        Assert.assertEquals(expected1, result1.getValue(), 0.0)
+        Assert.assertEquals(expected2, result2.getValue(), 0.0)
+    }
+
+    @Test
+    fun moneyFormatterTest() {
+        val systemCurrency = Currency.getInstance("USD").symbol
+        println(systemCurrency)
+    }
+}
+```