PM-23365: Create ToastManager to simplify displaying toasts from a Manager or ViewModel (#5479)

core/src/main/kotlin/com/bitwarden/core/data/manager/toast/ToastManager.kt

@@ -0,0 +1,19 @@
+package com.bitwarden.core.data.manager.toast
+
+import android.widget.Toast
+import androidx.annotation.StringRes
+
+/**
+ * Wrapper class for displaying a [Toast].
+ */
+interface ToastManager {
+    /**
+     * Displays a [Toast] with the given [message].
+     */
+    fun show(message: CharSequence, duration: Int = Toast.LENGTH_SHORT)
+
+    /**
+     * Displays a [Toast] with the given [messageId].
+     */
+    fun show(@StringRes messageId: Int, duration: Int = Toast.LENGTH_SHORT)
+}

core/src/main/kotlin/com/bitwarden/core/data/manager/toast/ToastManagerImpl.kt

@@ -0,0 +1,19 @@
+package com.bitwarden.core.data.manager.toast
+
+import android.content.Context
+import android.widget.Toast
+
+/**
+ * The default implementation of the [ToastManager].
+ */
+class ToastManagerImpl(
+    private val context: Context,
+) : ToastManager {
+    override fun show(message: CharSequence, duration: Int) {
+        Toast.makeText(context, message, duration).show()
+    }
+
+    override fun show(messageId: Int, duration: Int) {
+        Toast.makeText(context, messageId, duration).show()
+    }
+}

core/src/test/kotlin/com/bitwarden/core/data/manager/toast/ToastManagerTest.kt

@@ -0,0 +1,68 @@
+package com.bitwarden.core.data.manager.toast
+
+import android.content.Context
+import android.widget.Toast
+import io.mockk.every
+import io.mockk.just
+import io.mockk.mockk
+import io.mockk.mockkStatic
+import io.mockk.runs
+import io.mockk.unmockkStatic
+import io.mockk.verify
+import org.junit.jupiter.api.AfterEach
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+
+class ToastManagerTest {
+    private val context: Context = mockk()
+    private val toast: Toast = mockk {
+        every { show() } just runs
+    }
+    private val toastManager: ToastManager = ToastManagerImpl(
+        context = context,
+    )
+
+    @BeforeEach
+    fun setup() {
+        mockkStatic(Toast::class)
+        every { Toast.makeText(context, any<CharSequence>(), any()) } returns toast
+        every { Toast.makeText(context, any<Int>(), any()) } returns toast
+    }
+
+    @AfterEach
+    fun tearDown() {
+        unmockkStatic(Toast::class)
+    }
+
+    @Test
+    fun `show with string should call show on Toast`() {
+        val message = "Test"
+        toastManager.show(message = message)
+        verify {
+            Toast.makeText(context, message, Toast.LENGTH_SHORT)
+            toast.show()
+        }
+
+        toastManager.show(message = message, Toast.LENGTH_LONG)
+        verify {
+            Toast.makeText(context, message, Toast.LENGTH_LONG)
+            toast.show()
+        }
+    }
+
+    @Test
+    fun `show with string resource should call show on Toast`() {
+        val messageId = 555
+        toastManager.show(messageId = messageId)
+        verify {
+            Toast.makeText(context, messageId, Toast.LENGTH_SHORT)
+            toast.show()
+        }
+
+        toastManager.show(messageId = messageId, Toast.LENGTH_LONG)
+        verify {
+            Toast.makeText(context, messageId, Toast.LENGTH_LONG)
+            toast.show()
+        }
+    }
+}