[PM-8223] new device verification continue button enabled at 8 digit (#4790)

Author: aj-rosado

app/src/main/java/com/x8bit/bitwarden/ui/auth/feature/twofactorlogin/TwoFactorLoginViewModel.kt

@@ -189,10 +189,12 @@ class TwoFactorLoginViewModel @Inject constructor(
      * Update the state with the new text and enable or disable the continue button.
      */
     private fun handleCodeInputChanged(action: TwoFactorLoginAction.CodeInputChanged) {
+        @Suppress("MagicNumber")
+        val minLength = if (state.isNewDeviceVerification) 8 else 6
         mutableStateFlow.update {
             it.copy(
                 codeInput = action.input,
-                isContinueButtonEnabled = action.input.length >= 6,
+                isContinueButtonEnabled = action.input.length >= minLength,
             )
         }
     }

app/src/test/java/com/x8bit/bitwarden/ui/auth/feature/twofactorlogin/TwoFactorLoginViewModelTest.kt

@@ -310,6 +310,33 @@ class TwoFactorLoginViewModelTest : BaseViewModelTest() {
         )
     }
 
+    @Test
+    @Suppress("MaxLineLength")
+    fun `Continue buttons should only be enabled when code is 8 digit enough on isNewDeviceVerification`() {
+        val initialState = DEFAULT_STATE.copy(isNewDeviceVerification = true)
+        val viewModel = createViewModel(initialState)
+        viewModel.trySendAction(TwoFactorLoginAction.CodeInputChanged("123456"))
+
+        // 6 digit should be false when isNewDeviceVerification is true.
+        assertEquals(
+            initialState.copy(
+                codeInput = "123456",
+                isContinueButtonEnabled = false,
+            ),
+            viewModel.stateFlow.value,
+        )
+
+        // Set it to true.
+        viewModel.trySendAction(TwoFactorLoginAction.CodeInputChanged("12345678"))
+        assertEquals(
+            initialState.copy(
+                codeInput = "12345678",
+                isContinueButtonEnabled = true,
+            ),
+            viewModel.stateFlow.value,
+        )
+    }
+
     @Test
     fun `ContinueButtonClick login returns success should update loadingDialogState`() = runTest {
         coEvery {