Closes #8240: Only dismiss prompts that are not already dismissed

components/browser/engine-gecko-beta/src/main/java/mozilla/components/browser/engine/gecko/prompt/GeckoPromptDelegate.kt

@@ -85,7 +85,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(Autocomplete.LoginSelectOption(login.toLoginEntry())))
         }
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         geckoEngineSession.notifyObservers {
@@ -110,7 +110,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(Autocomplete.LoginSelectOption(login.toLoginEntry())))
         }
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         // Exactly one of `httpRealm` and `formSubmitURL` must be present to be a valid login entry.
@@ -174,7 +174,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         prompt: PromptDelegate.AlertPrompt
     ): GeckoResult<PromptResponse> {
         val geckoResult = GeckoResult<PromptResponse>()
-        val onConfirm: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onConfirm: () -> Unit = { prompt.dismissSafely(geckoResult) }
         val title = prompt.title ?: ""
         val message = prompt.message ?: ""
 
@@ -219,7 +219,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         }
 
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         geckoEngineSession.notifyObservers {
@@ -298,7 +298,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
                 }
             }
 
-        val onDismiss: () -> Unit = { geckoResult.complete(geckoPrompt.dismiss()) }
+        val onDismiss: () -> Unit = { geckoPrompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -328,7 +328,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         val title = prompt.title ?: ""
         val inputLabel = prompt.message ?: ""
         val inputValue = prompt.defaultValue ?: ""
-        val onDismiss: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: () -> Unit = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -352,7 +352,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
     ): GeckoResult<PromptResponse>? {
         val geckoResult = GeckoResult<PromptResponse>()
         val onConfirm: (String) -> Unit = { geckoResult.complete(prompt.confirm(it)) }
-        val onDismiss: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: () -> Unit = { prompt.dismissSafely(geckoResult) }
 
         val defaultColor = prompt.defaultValue ?: ""
 
@@ -403,7 +403,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         val geckoResult = GeckoResult<PromptResponse>()
         val onSuccess = { geckoResult.complete(prompt.confirm(GECKO_PROMPT_SHARE_RESULT.SUCCESS)) }
         val onFailure = { geckoResult.complete(prompt.confirm(GECKO_PROMPT_SHARE_RESULT.FAILURE)) }
-        val onDismiss = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -437,7 +437,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(PromptDelegate.ButtonPrompt.Type.NEGATIVE))
         }
 
-        val onDismiss: (Boolean) -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: (Boolean) -> Unit = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -573,3 +573,13 @@ internal fun Date.toString(format: String): String {
     val formatter = SimpleDateFormat(format, Locale.ROOT)
     return formatter.format(this) ?: ""
 }
+
+/**
+ * Only dismiss if the prompt is not already dismissed.
+ */
+@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
+internal fun PromptDelegate.BasePrompt.dismissSafely(geckoResult: GeckoResult<PromptResponse>) {
+    if (!this.isComplete) {
+        geckoResult.complete(dismiss())
+    }
+}

components/browser/engine-gecko-beta/src/test/java/mozilla/components/browser/engine/gecko/prompt/GeckoPromptDelegateTest.kt

@@ -26,10 +26,12 @@ import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
-import org.mockito.Mockito.doReturn
 import org.mockito.Mockito.spy
+import org.mockito.Mockito
+import org.mockito.Mockito.doReturn
 import org.mozilla.gecko.util.GeckoBundle
 import org.mozilla.geckoview.Autocomplete
+import org.mozilla.geckoview.GeckoResult
 import org.mozilla.geckoview.GeckoRuntime
 import org.mozilla.geckoview.GeckoSession
 import org.mozilla.geckoview.GeckoSession.PromptDelegate.DateTimePrompt.Type.DATE
@@ -1080,6 +1082,30 @@ class GeckoPromptDelegateTest {
         assertTrue(dismissWasCalled)
     }
 
+    @Test
+    fun `dismissSafely only dismiss if the prompt is NOT already dismissed`() {
+        val prompt = spy(GeckoAlertPrompt())
+        val geckoResult = mock<GeckoResult<GeckoSession.PromptDelegate.PromptResponse>>()
+
+        doReturn(false).`when`(prompt).isComplete
+
+        prompt.dismissSafely(geckoResult)
+
+        Mockito.verify(geckoResult).complete(any())
+    }
+
+    @Test
+    fun `dismissSafely do nothing if the prompt is already dismissed`() {
+        val prompt = spy(GeckoAlertPrompt())
+        val geckoResult = mock<GeckoResult<GeckoSession.PromptDelegate.PromptResponse>>()
+
+        doReturn(true).`when`(prompt).isComplete
+
+        prompt.dismissSafely(geckoResult)
+
+        Mockito.verify(geckoResult, Mockito.never()).complete(any())
+    }
+
     class GeckoChoicePrompt(
         title: String,
         message: String,

components/browser/engine-gecko-nightly/src/main/java/mozilla/components/browser/engine/gecko/prompt/GeckoPromptDelegate.kt

@@ -85,7 +85,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(Autocomplete.LoginSelectOption(login.toLoginEntry())))
         }
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         geckoEngineSession.notifyObservers {
@@ -110,7 +110,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(Autocomplete.LoginSelectOption(login.toLoginEntry())))
         }
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         // Exactly one of `httpRealm` and `formSubmitURL` must be present to be a valid login entry.
@@ -174,7 +174,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         prompt: PromptDelegate.AlertPrompt
     ): GeckoResult<PromptResponse> {
         val geckoResult = GeckoResult<PromptResponse>()
-        val onConfirm: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onConfirm: () -> Unit = { prompt.dismissSafely(geckoResult) }
         val title = prompt.title ?: ""
         val message = prompt.message ?: ""
 
@@ -219,7 +219,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         }
 
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         geckoEngineSession.notifyObservers {
@@ -298,7 +298,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
                 }
             }
 
-        val onDismiss: () -> Unit = { geckoResult.complete(geckoPrompt.dismiss()) }
+        val onDismiss: () -> Unit = { geckoPrompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -328,7 +328,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         val title = prompt.title ?: ""
         val inputLabel = prompt.message ?: ""
         val inputValue = prompt.defaultValue ?: ""
-        val onDismiss: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: () -> Unit = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -352,7 +352,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
     ): GeckoResult<PromptResponse>? {
         val geckoResult = GeckoResult<PromptResponse>()
         val onConfirm: (String) -> Unit = { geckoResult.complete(prompt.confirm(it)) }
-        val onDismiss: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: () -> Unit = { prompt.dismissSafely(geckoResult) }
 
         val defaultColor = prompt.defaultValue ?: ""
 
@@ -403,7 +403,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         val geckoResult = GeckoResult<PromptResponse>()
         val onSuccess = { geckoResult.complete(prompt.confirm(GECKO_PROMPT_SHARE_RESULT.SUCCESS)) }
         val onFailure = { geckoResult.complete(prompt.confirm(GECKO_PROMPT_SHARE_RESULT.FAILURE)) }
-        val onDismiss = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -437,7 +437,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(PromptDelegate.ButtonPrompt.Type.NEGATIVE))
         }
 
-        val onDismiss: (Boolean) -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: (Boolean) -> Unit = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -573,3 +573,14 @@ internal fun Date.toString(format: String): String {
     val formatter = SimpleDateFormat(format, Locale.ROOT)
     return formatter.format(this) ?: ""
 }
+
+/**
+ * Only dismiss if the prompt is not already dismissed.
+ */
+@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
+
+internal fun PromptDelegate.BasePrompt.dismissSafely(geckoResult: GeckoResult<PromptResponse>) {
+    if (!this.isComplete) {
+        geckoResult.complete(dismiss())
+    }
+}

components/browser/engine-gecko-nightly/src/test/java/mozilla/components/browser/engine/gecko/prompt/GeckoPromptDelegateTest.kt

@@ -28,8 +28,11 @@ import org.junit.Test
 import org.junit.runner.RunWith
 import org.mockito.Mockito.doReturn
 import org.mockito.Mockito.spy
+import org.mockito.Mockito.verify
+import org.mockito.Mockito.never
 import org.mozilla.gecko.util.GeckoBundle
 import org.mozilla.geckoview.Autocomplete
+import org.mozilla.geckoview.GeckoResult
 import org.mozilla.geckoview.GeckoRuntime
 import org.mozilla.geckoview.GeckoSession
 import org.mozilla.geckoview.GeckoSession.PromptDelegate.DateTimePrompt.Type.DATE
@@ -1080,6 +1083,30 @@ class GeckoPromptDelegateTest {
         assertTrue(dismissWasCalled)
     }
 
+    @Test
+    fun `dismissSafely only dismiss if the prompt is NOT already dismissed`() {
+        val prompt = spy(GeckoAlertPrompt())
+        val geckoResult = mock<GeckoResult<GeckoSession.PromptDelegate.PromptResponse>>()
+
+        doReturn(false).`when`(prompt).isComplete
+
+        prompt.dismissSafely(geckoResult)
+
+        verify(geckoResult).complete(any())
+    }
+
+    @Test
+    fun `dismissSafely do nothing if the prompt is already dismissed`() {
+        val prompt = spy(GeckoAlertPrompt())
+        val geckoResult = mock<GeckoResult<GeckoSession.PromptDelegate.PromptResponse>>()
+
+        doReturn(true).`when`(prompt).isComplete
+
+        prompt.dismissSafely(geckoResult)
+
+        verify(geckoResult, never()).complete(any())
+    }
+
     class GeckoChoicePrompt(
         title: String,
         message: String,

components/browser/engine-gecko/src/main/java/mozilla/components/browser/engine/gecko/prompt/GeckoPromptDelegate.kt

@@ -85,7 +85,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(Autocomplete.LoginSelectOption(login.toLoginEntry())))
         }
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         geckoEngineSession.notifyObservers {
@@ -110,7 +110,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(Autocomplete.LoginSelectOption(login.toLoginEntry())))
         }
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         // Exactly one of `httpRealm` and `formSubmitURL` must be present to be a valid login entry.
@@ -174,7 +174,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         prompt: PromptDelegate.AlertPrompt
     ): GeckoResult<PromptResponse> {
         val geckoResult = GeckoResult<PromptResponse>()
-        val onConfirm: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onConfirm: () -> Unit = { prompt.dismissSafely(geckoResult) }
         val title = prompt.title ?: ""
         val message = prompt.message ?: ""
 
@@ -219,7 +219,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         }
 
         val onDismiss: () -> Unit = {
-            geckoResult.complete(prompt.dismiss())
+            prompt.dismissSafely(geckoResult)
         }
 
         geckoEngineSession.notifyObservers {
@@ -298,7 +298,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
                 }
             }
 
-        val onDismiss: () -> Unit = { geckoResult.complete(geckoPrompt.dismiss()) }
+        val onDismiss: () -> Unit = { geckoPrompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -328,7 +328,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         val title = prompt.title ?: ""
         val inputLabel = prompt.message ?: ""
         val inputValue = prompt.defaultValue ?: ""
-        val onDismiss: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: () -> Unit = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -352,7 +352,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
     ): GeckoResult<PromptResponse>? {
         val geckoResult = GeckoResult<PromptResponse>()
         val onConfirm: (String) -> Unit = { geckoResult.complete(prompt.confirm(it)) }
-        val onDismiss: () -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: () -> Unit = { prompt.dismissSafely(geckoResult) }
 
         val defaultColor = prompt.defaultValue ?: ""
 
@@ -403,7 +403,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
         val geckoResult = GeckoResult<PromptResponse>()
         val onSuccess = { geckoResult.complete(prompt.confirm(GECKO_PROMPT_SHARE_RESULT.SUCCESS)) }
         val onFailure = { geckoResult.complete(prompt.confirm(GECKO_PROMPT_SHARE_RESULT.FAILURE)) }
-        val onDismiss = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -437,7 +437,7 @@ internal class GeckoPromptDelegate(private val geckoEngineSession: GeckoEngineSe
             geckoResult.complete(prompt.confirm(PromptDelegate.ButtonPrompt.Type.NEGATIVE))
         }
 
-        val onDismiss: (Boolean) -> Unit = { geckoResult.complete(prompt.dismiss()) }
+        val onDismiss: (Boolean) -> Unit = { prompt.dismissSafely(geckoResult) }
 
         geckoEngineSession.notifyObservers {
             onPromptRequest(
@@ -573,3 +573,13 @@ internal fun Date.toString(format: String): String {
     val formatter = SimpleDateFormat(format, Locale.ROOT)
     return formatter.format(this) ?: ""
 }
+
+/**
+ * Only dismiss if the prompt is not already dismissed.
+ */
+@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
+internal fun PromptDelegate.BasePrompt.dismissSafely(geckoResult: GeckoResult<PromptResponse>) {
+    if (!this.isComplete) {
+        geckoResult.complete(dismiss())
+    }
+}