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@@ -0,0 +1,90 @@
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+package com.chameth.yaotp.viewmodel
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+
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+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
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+import com.chameth.yaotp.accounts.Account
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+import com.nhaarman.mockitokotlin2.*
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+import org.junit.Assert.assertEquals
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+import org.junit.Rule
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+import org.junit.Test
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+
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+class OtpListViewModelTest {
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+
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+ @get:Rule
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+ val instantTaskExecutorRule = InstantTaskExecutorRule()
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+
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+ private val viewModel = OtpListViewModel()
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+ private val observer = mock<OtpListViewModel.AccountObserver>()
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+
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+ @Test
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+ fun testAddAccount_incrementsNumberOfAccounts() {
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+ assertEquals(0, viewModel.numberOfAccounts)
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+ viewModel.addAccount(mock())
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+ assertEquals(1, viewModel.numberOfAccounts)
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+ viewModel.addAccount(mock())
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+ assertEquals(2, viewModel.numberOfAccounts)
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+ }
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+
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+ @Test
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+ fun testRemoveAccount_decrementsNumberOfAccounts() {
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+ val account1 = mock<Account>()
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+ val account2 = mock<Account>()
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+ viewModel.addAccount(account1)
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+ viewModel.addAccount(account2)
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+ viewModel.removeAccount(account1)
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+ assertEquals(1, viewModel.numberOfAccounts)
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+ viewModel.removeAccount(account2)
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+ assertEquals(0, viewModel.numberOfAccounts)
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+ }
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+
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+ @Test
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+ fun testRemoveAccount_withNonExistantAccount_doesNothing() {
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+ val account1 = mock<Account>()
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+ val account2 = mock<Account>()
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+ viewModel.addAccount(account1)
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+ viewModel.addObserver(observer)
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+ viewModel.removeAccount(account2)
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+
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+ verifyNoMoreInteractions(observer)
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+ }
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+
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+ @Test
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+ fun testAddAccount_notifiesRegisteredObservers() {
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+ viewModel.addAccount(mock())
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+ viewModel.addObserver(observer)
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+ viewModel.addAccount(mock())
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+ viewModel.removeObserver(observer)
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+ viewModel.addAccount(mock())
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+
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+ verify(observer).accountAdded(1)
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+ verify(observer, never()).accountAdded(0)
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+ verify(observer, never()).accountAdded(2)
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+ }
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+
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+ @Test
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+ fun testRemoveAccount_notifiesRegisteredObservers() {
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+ val account1 = mock<Account>()
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+ val account2 = mock<Account>()
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+ val account3 = mock<Account>()
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+ viewModel.addAccount(account1)
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+ viewModel.addAccount(account2)
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+ viewModel.addAccount(account3)
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+ viewModel.removeAccount(account1)
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+ viewModel.addObserver(observer)
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+ viewModel.removeAccount(account3)
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+ viewModel.removeObserver(observer)
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+ viewModel.removeAccount(account2)
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+
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+ verify(observer).accountRemoved(1)
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+ verify(observer, never()).accountRemoved(0)
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+ }
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+
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+ @Test
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+ fun testGetViewModel_returnsCorrectViewModel() {
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+ viewModel.addAccount(mock { on { label } doReturn "Foo" })
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+ viewModel.addAccount(mock { on { label } doReturn "Bar" })
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+
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+ assertEquals("Foo", viewModel.getViewModelForAccount(0).label.value)
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+ assertEquals("Bar", viewModel.getViewModelForAccount(1).label.value)
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+ }
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+
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+}
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