Merge pull request Baeldung#1001 from sk1418/mockk-unmock-clearmock

[mockk-unmock-clearmock] unmockkall and clearallmocks

Author: theangrydev

kotlin-mockito/src/test/kotlin/com/baeldung/mockk/ClearAllMocksVsUnmockkAllUnitTest.kt

@@ -0,0 +1,126 @@
+package com.baeldung.mockk
+
+import io.mockk.*
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.assertThrows
+import kotlin.test.assertEquals
+
+class GreetingService {
+    fun greeting(name: String) = "$name, how are you?"
+
+    companion object {
+        fun sayGoodDay(name: String) = "$name, good day!"
+    }
+}
+
+object GoodMorning {
+    fun sayGoodMorning(name: String) = "$name, good morning!"
+}
+
+fun sayGoodNight(name: String) = "$name, good night!"
+
+class ClearAllMocksVsUnmockkAllUnitTest {
+
+    @Test
+    fun `when using clearAllMocks() then Mock objects are cleared`() {
+        val greetingServiceMock = mockk<GreetingService> {
+            every { greeting(any()) } returns "mocked instance"
+        }
+        assertEquals("mocked instance", greetingServiceMock.greeting("Kai"))
+
+        clearAllMocks()
+
+        assertThrows<MockKException> {
+            greetingServiceMock.greeting("Kai")
+        }.also { it.message?.startsWith("no answer found for: com.baeldung.mockk.GreetingService") }
+    }
+
+    @Test
+    fun `when using unmockkAll() then Mock objects are still available`() {
+        val greetingServiceMock = mockk<GreetingService> {
+            every { greeting(any()) } returns "mocked instance"
+        }
+        assertEquals("mocked instance", greetingServiceMock.greeting("Kai"))
+
+        unmockkAll()
+
+        assertEquals("mocked instance", greetingServiceMock.greeting("Kai"))
+    }
+
+
+    @Test
+    fun `when using clearAllMocks() then mocks are cleared`() {
+        mockkObject(GreetingService)
+        every { GreetingService.sayGoodDay(any()) } returns "mocked static fun"
+        assertEquals("mocked static fun", GreetingService.sayGoodDay("Kai"))
+
+        mockkObject(GoodMorning)
+        every { GoodMorning.sayGoodMorning(any()) } returns "mocked object"
+        assertEquals("mocked object", GoodMorning.sayGoodMorning("Kai"))
+
+        mockkStatic(::sayGoodNight)
+        every { sayGoodNight(any()) } returns "mocked top-level fun"
+        assertEquals("mocked top-level fun", sayGoodNight("Kai"))
+
+        clearAllMocks()
+
+        assertEquals("Kai, good day!", GreetingService.sayGoodDay("Kai"))
+        assertEquals("Kai, good morning!", GoodMorning.sayGoodMorning("Kai"))
+        assertEquals("Kai, good night!", sayGoodNight("Kai"))
+    }
+
+    @Test
+    fun `when using unmockkAll() then mocks are unmocked`() {
+        mockkObject(GreetingService)
+        every { GreetingService.sayGoodDay(any()) } returns "mocked static fun"
+        assertEquals("mocked static fun", GreetingService.sayGoodDay("Kai"))
+
+        mockkObject(GoodMorning)
+        every { GoodMorning.sayGoodMorning(any()) } returns "mocked object"
+        assertEquals("mocked object", GoodMorning.sayGoodMorning("Kai"))
+
+        mockkStatic(::sayGoodNight)
+        every { sayGoodNight(any()) } returns "mocked top-level fun"
+        assertEquals("mocked top-level fun", sayGoodNight("Kai"))
+
+        unmockkAll()
+
+        assertEquals("Kai, good day!", GreetingService.sayGoodDay("Kai"))
+        assertEquals("Kai, good morning!", GoodMorning.sayGoodMorning("Kai"))
+        assertEquals("Kai, good night!", sayGoodNight("Kai"))
+    }
+
+    @Test
+    fun `after calling clearAllMocks() then the mock can be reused`() {
+        mockkStatic(::sayGoodNight)
+        every { sayGoodNight(any()) } returns "mocked top-level fun"
+        assertEquals("mocked top-level fun", sayGoodNight("Kai"))
+
+        clearAllMocks()
+
+        assertEquals("Kai, good night!", sayGoodNight("Kai"))
+
+        every { sayGoodNight(any()) } returns "get mocked again"
+        assertEquals("get mocked again", sayGoodNight("Kai"))
+    }
+
+    @Test
+    fun `after calling unmockkAll() then the mock cannot be reused`() {
+        mockkStatic(::sayGoodNight)
+        every { sayGoodNight(any()) } returns "mocked top-level fun"
+        assertEquals("mocked top-level fun", sayGoodNight("Kai"))
+
+        unmockkAll()
+
+        assertEquals("Kai, good night!", sayGoodNight("Kai"))
+        assertThrows<MockKException> {
+            every { sayGoodNight(any()) } returns "mocked again"
+        }.also { it.message?.startsWith("Failed matching mocking signature") }
+
+        mockkStatic(::sayGoodNight)
+        every { sayGoodNight(any()) } returns "mocked again"
+        assertEquals("mocked again", sayGoodNight("Kai"))
+
+    }
+
+}