diff --git a/src/test/kotlin/dev/dnpm/etl/processor/services/TokenServiceTest.kt b/src/test/kotlin/dev/dnpm/etl/processor/services/TokenServiceTest.kt
new file mode 100644
index 0000000..1fdc3d9
--- /dev/null
+++ b/src/test/kotlin/dev/dnpm/etl/processor/services/TokenServiceTest.kt
@@ -0,0 +1,154 @@
+/*
+ * This file is part of ETL-Processor
+ *
+ * Copyright (c) 2024  Comprehensive Cancer Center Mainfranken, Datenintegrationszentrum Philipps-Universität Marburg and Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package dev.dnpm.etl.processor.services
+
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.mockito.ArgumentCaptor
+import org.mockito.ArgumentMatchers.anyLong
+import org.mockito.ArgumentMatchers.anyString
+import org.mockito.Mock
+import org.mockito.junit.jupiter.MockitoExtension
+import org.mockito.kotlin.*
+import org.springframework.security.crypto.password.PasswordEncoder
+import org.springframework.security.provisioning.InMemoryUserDetailsManager
+import java.util.*
+import java.util.function.Consumer
+
+@ExtendWith(MockitoExtension::class)
+class TokenServiceTest {
+
+    private lateinit var userDetailsManager: InMemoryUserDetailsManager
+    private lateinit var passwordEncoder: PasswordEncoder
+    private lateinit var tokenRepository: TokenRepository
+
+    private lateinit var tokenService: TokenService
+
+    @BeforeEach
+    fun setup(
+        @Mock userDetailsManager: InMemoryUserDetailsManager,
+        @Mock passwordEncoder: PasswordEncoder,
+        @Mock tokenRepository: TokenRepository
+    ) {
+        this.userDetailsManager = userDetailsManager
+        this.passwordEncoder = passwordEncoder
+        this.tokenRepository = tokenRepository
+
+        this.tokenService = TokenService(userDetailsManager, passwordEncoder, tokenRepository)
+    }
+
+    @Test
+    fun shouldEncodePasswordForNewToken() {
+        doAnswer { "{test}verysecret" }.whenever(passwordEncoder).encode(anyString())
+
+        val actual = this.tokenService.addToken("Test Token")
+
+        assertThat(actual).satisfies(
+            Consumer { assertThat(it.isSuccess).isTrue() },
+            Consumer { assertThat(it.getOrNull()).matches("testtoken:[A-Za-z0-9]{48}$") }
+        )
+    }
+
+    @Test
+    fun shouldContainAlphanumTokenUserPart() {
+        doAnswer { "{test}verysecret" }.whenever(passwordEncoder).encode(anyString())
+
+        val actual = this.tokenService.addToken("Test Token")
+
+        assertThat(actual).satisfies(
+            Consumer { assertThat(it.isSuccess).isTrue() },
+            Consumer { assertThat(it.getOrDefault("")).startsWith("testtoken:") }
+        )
+    }
+
+    @Test
+    fun shouldNotAllowSameTokenUserPartTwice() {
+        doReturn(true).whenever(userDetailsManager).userExists(anyString())
+
+        val actual = this.tokenService.addToken("Test Token")
+
+        assertThat(actual).satisfies(Consumer { assertThat(it.isFailure).isTrue() })
+        verify(tokenRepository, never()).save(any())
+    }
+
+    @Test
+    fun shouldSaveNewToken() {
+        doAnswer { "{test}verysecret" }.whenever(passwordEncoder).encode(anyString())
+
+        val actual = this.tokenService.addToken("Test Token")
+
+        val captor = ArgumentCaptor.forClass(Token::class.java)
+        verify(tokenRepository, times(1)).save(captor.capture())
+
+        assertThat(actual).satisfies(Consumer { assertThat(it.isSuccess).isTrue() })
+        assertThat(captor.value).satisfies(
+            Consumer { assertThat(it.name).isEqualTo("Test Token") },
+            Consumer { assertThat(it.username).isEqualTo("testtoken") },
+            Consumer { assertThat(it.password).isEqualTo("{test}verysecret") }
+        )
+    }
+
+    @Test
+    fun shouldDeleteExistingToken() {
+        doAnswer {
+            val id = it.arguments[0] as Long
+            Optional.of(Token(id, "Test Token", "testtoken", "{test}hsdajfgadskjhfgsdkfjg"))
+        }.whenever(tokenRepository).findById(anyLong())
+
+        this.tokenService.deleteToken(42)
+
+        val stringCaptor = ArgumentCaptor.forClass(String::class.java)
+        verify(userDetailsManager, times(1)).deleteUser(stringCaptor.capture())
+        assertThat(stringCaptor.value).isEqualTo("testtoken")
+
+        val tokenCaptor = ArgumentCaptor.forClass(Token::class.java)
+        verify(tokenRepository, times(1)).delete(tokenCaptor.capture())
+        assertThat(tokenCaptor.value.id).isEqualTo(42)
+    }
+
+    @Test
+    fun shouldReturnAllTokensFromRepository() {
+        val expected = listOf(
+            Token(1, "Test Token 1", "testtoken1", "{test}hsdajfgadskjhfgsdkfjg"),
+            Token(2, "Test Token 2", "testtoken2", "{test}asdasdasdasdasdasdasd")
+        )
+
+        doReturn(expected).whenever(tokenRepository).findAll()
+
+        assertThat(tokenService.findAll()).isEqualTo(expected)
+    }
+
+    @Test
+    fun shouldAddAllTokensFromRepositoryToUserDataManager() {
+        val expected = listOf(
+            Token(1, "Test Token 1", "testtoken1", "{test}hsdajfgadskjhfgsdkfjg"),
+            Token(2, "Test Token 2", "testtoken2", "{test}asdasdasdasdasdasdasd")
+        )
+
+        doReturn(expected).whenever(tokenRepository).findAll()
+
+        tokenService.setup()
+
+        verify(userDetailsManager, times(expected.size)).createUser(any())
+    }
+
+}
\ No newline at end of file