Fix null intent crash

feature/google/src/main/java/com/revenuecat/purchases/google/BillingWrapper.kt

@@ -222,6 +222,9 @@ class BillingWrapper(
         activity: Activity,
         params: BillingFlowParams
     ) {
+        if (activity.intent == null) {
+            log(LogIntent.WARNING, BillingStrings.NULL_ACTIVITY_INTENT)
+        }
         withConnectedClient {
             launchBillingFlow(activity, params)
                 .takeIf { billingResult -> billingResult.responseCode != BillingClient.BillingResponseCode.OK }

feature/google/src/test/java/com/revenuecat/purchases/google/BillingWrapperTest.kt

@@ -2,6 +2,7 @@ package com.revenuecat.purchases.google
 
 import android.app.Activity
 import android.content.Context
+import android.content.Intent
 import android.os.Handler
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.android.billingclient.api.AcknowledgePurchaseParams
@@ -80,6 +81,7 @@ class BillingWrapperTest {
 
     private val billingClientOKResult = BillingClient.BillingResponseCode.OK.buildResult()
     private val appUserId = "jerry"
+    private var mockActivity = mockk<Activity>()
 
     @Before
     fun setup() {
@@ -145,6 +147,10 @@ class BillingWrapperTest {
                 onConnectedCalled = true
             }
         }
+
+        every {
+            mockActivity.intent
+        } returns Intent()
     }
 
     @Test
@@ -252,11 +258,9 @@ class BillingWrapperTest {
 
         val skuDetails = stubSkuDetails(productId = "product_a")
 
-        val activity: Activity = mockk()
-
         billingClientStateListener!!.onBillingSetupFinished(BillingClient.BillingResponseCode.OK.buildResult())
         wrapper.makePurchaseAsync(
-            activity,
+            mockActivity,
             appUserId,
             skuDetails.toStoreProduct(),
             mockReplaceSkuInfo(),
@@ -265,7 +269,7 @@ class BillingWrapperTest {
 
         verify {
             mockClient.launchBillingFlow(
-                eq(activity),
+                eq(mockActivity),
                 any()
             )
         }
@@ -305,12 +309,11 @@ class BillingWrapperTest {
         @BillingClient.SkuType val skuType = BillingClient.SkuType.SUBS
 
         val upgradeInfo = mockReplaceSkuInfo()
-        val activity: Activity = mockk()
         val skuDetails = stubSkuDetails(productId = sku, type = skuType)
 
         val slot = slot<BillingFlowParams>()
         every {
-            mockClient.launchBillingFlow(eq(activity), capture(slot))
+            mockClient.launchBillingFlow(eq(mockActivity), capture(slot))
         } answers {
             val capturedSkuDetails = skuDetailsSlot.captured
 
@@ -324,7 +327,7 @@ class BillingWrapperTest {
 
         billingClientStateListener!!.onBillingSetupFinished(BillingClient.BillingResponseCode.OK.buildResult())
         wrapper.makePurchaseAsync(
-            activity,
+            mockActivity,
             appUserId,
             skuDetails.toStoreProduct(),
             upgradeInfo,
@@ -337,7 +340,7 @@ class BillingWrapperTest {
         val mockBuilder = setUpForObfuscatedAccountIDTests()
 
         wrapper.makePurchaseAsync(
-            mockk(),
+            mockActivity,
             appUserId,
             stubSkuDetails(productId = "product_a").toStoreProduct(),
             null,
@@ -357,7 +360,7 @@ class BillingWrapperTest {
         val mockBuilder = setUpForObfuscatedAccountIDTests()
 
         wrapper.makePurchaseAsync(
-            mockk(),
+            mockActivity,
             appUserId,
             stubSkuDetails(productId = "product_a").toStoreProduct(),
             mockReplaceSkuInfo(),
@@ -379,27 +382,26 @@ class BillingWrapperTest {
 
         every { mockClient.isReady } returns false
 
-        val activity: Activity = mockk()
         val skuDetails = stubSkuDetails(productId = "product_a")
 
         wrapper.makePurchaseAsync(
-            activity,
+            mockActivity,
             appUserId,
             skuDetails.toStoreProduct(),
             mockReplaceSkuInfo(),
             null
         )
 
         verify(exactly = 0) {
-            mockClient.launchBillingFlow(eq(activity), any())
+            mockClient.launchBillingFlow(eq(mockActivity), any())
         }
 
         every { mockClient.isReady } returns true
 
         billingClientStateListener!!.onBillingSetupFinished(BillingClient.BillingResponseCode.OK.buildResult())
 
         verify(exactly = 1) {
-            mockClient.launchBillingFlow(eq(activity), any())
+            mockClient.launchBillingFlow(eq(mockActivity), any())
         }
     }
 
@@ -413,10 +415,8 @@ class BillingWrapperTest {
 
         val skuDetails = stubSkuDetails(productId = "product_a")
 
-        val activity: Activity = mockk()
-
         wrapper.makePurchaseAsync(
-            activity,
+            mockActivity,
             appUserId,
             skuDetails.toStoreProduct(),
             mockReplaceSkuInfo(),
@@ -809,11 +809,9 @@ class BillingWrapperTest {
 
         val skuDetails = stubSkuDetails(productId = "product_a")
 
-        val activity: Activity = mockk()
-
         billingClientStateListener!!.onBillingSetupFinished(BillingClient.BillingResponseCode.OK.buildResult())
         wrapper.makePurchaseAsync(
-            activity,
+            mockActivity,
             appUserId,
             skuDetails.toStoreProduct(),
             mockReplaceSkuInfo(),

strings/src/main/java/com/revenuecat/purchases/strings/BillingStrings.kt

@@ -15,4 +15,6 @@ object BillingStrings {
         "PurchaseHistoryRecord, but only one will be used."
     const val BILLING_PURCHASE_MORE_THAN_ONE_SKU = "There's more than one sku in the PurchaseHistoryRecord, " +
         "but only one will be used."
+    const val NULL_ACTIVITY_INTENT = "Activity passed into launchBillingFlow has a null intent, which may cause " +
+        "a crash. See https://github.com/RevenueCat/purchases-android/issues/381 for more information."
 }