Convert PayPalCreditFinancingUnitTest from Java to Kotlin (#1391)

* Rename .java to .kt

* convert `PayPalCreditFinancingUnitTest` from Java to Kotlin

* Update PayPal/src/test/java/com/braintreepayments/api/paypal/PayPalCreditFinancingUnitTest.kt

Co-authored-by: agedd <105314544+agedd@users.noreply.github.com>

---------

Co-authored-by: agedd <105314544+agedd@users.noreply.github.com>

Author: noguier

PayPal/src/test/java/com/braintreepayments/api/paypal/PayPalCreditFinancingUnitTest.java

@@ -0,0 +1,104 @@
+package com.braintreepayments.api.paypal
+
+import android.os.Parcel
+import com.braintreepayments.api.testutils.Fixtures
+import kotlinx.parcelize.parcelableCreator
+import org.json.JSONException
+import org.json.JSONObject
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+
+@RunWith(RobolectricTestRunner::class)
+class PayPalCreditFinancingUnitTest {
+
+    @Test
+    @Throws(JSONException::class)
+    fun `creates PayPalCreditFinancing from JSON and returns null when empty`() {
+        val payPalCreditFinancing = PayPalCreditFinancing.fromJson(null)
+
+        assertNotNull(payPalCreditFinancing)
+        assertFalse(payPalCreditFinancing.isCardAmountImmutable)
+        assertEquals(0, payPalCreditFinancing.term)
+        assertFalse(payPalCreditFinancing.hasPayerAcceptance)
+        assertNull(payPalCreditFinancing.monthlyPayment)
+        assertNull(payPalCreditFinancing.totalCost)
+        assertNull(payPalCreditFinancing.totalInterest)
+    }
+
+    @Test
+    @Throws(JSONException::class)
+    fun `successfully creates PayPalCreditFinancing from standard JSON`() {
+        val payPalAccountResponse = Fixtures.PAYMENT_METHODS_PAYPAL_ACCOUNT_RESPONSE
+        val creditFinancingJsonObject = JSONObject(payPalAccountResponse).getJSONArray("paypalAccounts")
+            .getJSONObject(0).getJSONObject("details")
+            .getJSONObject("creditFinancingOffered")
+
+        val payPalCreditFinancing = PayPalCreditFinancing.fromJson(creditFinancingJsonObject)
+
+        assertFalse(payPalCreditFinancing.isCardAmountImmutable)
+        assertEquals(18, payPalCreditFinancing.term)
+        assertTrue(payPalCreditFinancing.hasPayerAcceptance)
+        assertEquals("USD", payPalCreditFinancing.monthlyPayment?.currency)
+        assertEquals("USD", payPalCreditFinancing.totalCost?.currency)
+        assertEquals("USD", payPalCreditFinancing.totalInterest?.currency)
+        assertEquals("13.88", payPalCreditFinancing.monthlyPayment?.value)
+        assertEquals("250.00", payPalCreditFinancing.totalCost?.value)
+        assertEquals("0.00", payPalCreditFinancing.totalInterest?.value)
+    }
+
+    @Test
+    @Throws(JSONException::class)
+    fun `creates PayPalCreditFinancing from JSON without credit financing data`() {
+        val payPalAccountResponse = Fixtures.PAYMENT_METHODS_PAYPAL_ACCOUNT_RESPONSE_WITHOUT_CREDIT_FINANCING_DATA
+        val creditFinancingJsonObject = JSONObject(payPalAccountResponse).getJSONArray("paypalAccounts")
+            .getJSONObject(0).getJSONObject("details")
+            .getJSONObject("creditFinancingOffered")
+
+        val payPalCreditFinancing = PayPalCreditFinancing.fromJson(creditFinancingJsonObject)
+
+        assertFalse(payPalCreditFinancing.isCardAmountImmutable)
+        assertEquals(18, payPalCreditFinancing.term)
+        assertFalse(payPalCreditFinancing.hasPayerAcceptance)
+        assertNull(payPalCreditFinancing.monthlyPayment?.currency)
+        assertNull(payPalCreditFinancing.totalCost?.currency)
+        assertNull(payPalCreditFinancing.totalInterest?.currency)
+        assertNull(payPalCreditFinancing.monthlyPayment?.value)
+        assertNull(payPalCreditFinancing.totalCost?.value)
+        assertNull(payPalCreditFinancing.totalInterest?.value)
+    }
+
+    @Test
+    @Throws(JSONException::class)
+    fun `writes to Parcel and serializes correctly`() {
+        val payPalAccountResponse = Fixtures.PAYMENT_METHODS_PAYPAL_ACCOUNT_RESPONSE
+        val creditFinancingJsonObject = JSONObject(payPalAccountResponse).getJSONArray("paypalAccounts")
+            .getJSONObject(0).getJSONObject("details")
+            .getJSONObject("creditFinancingOffered")
+
+        val preSerialized = PayPalCreditFinancing.fromJson(creditFinancingJsonObject)
+        val parcel = Parcel.obtain().apply {
+            preSerialized.writeToParcel(this, 0)
+            setDataPosition(0)
+        }
+
+        val payPalCreditFinancing = parcelableCreator<PayPalCreditFinancing>().createFromParcel(parcel)
+
+        assertNotNull(payPalCreditFinancing)
+        assertFalse(payPalCreditFinancing.isCardAmountImmutable)
+        assertEquals(18, payPalCreditFinancing.term)
+        assertTrue(payPalCreditFinancing.hasPayerAcceptance)
+        assertEquals("USD", payPalCreditFinancing.monthlyPayment?.currency)
+        assertEquals("USD", payPalCreditFinancing.totalCost?.currency)
+        assertEquals("USD", payPalCreditFinancing.totalInterest?.currency)
+        assertEquals("13.88", payPalCreditFinancing.monthlyPayment?.value)
+        assertEquals("250.00", payPalCreditFinancing.totalCost?.value)
+        assertEquals("0.00", payPalCreditFinancing.totalInterest?.value)
+    }
+}