diff --git a/build.gradle.kts b/build.gradle.kts
index 5253084..e1cfb47 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -35,6 +35,16 @@ dependencies {
     implementation("com.google.dagger:dagger:2.41")
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.2")
     kapt("com.google.dagger:dagger-compiler:2.41")
+    testImplementation(platform("org.junit:junit-bom:5.8.2"))
+    testImplementation("org.junit.jupiter:junit-jupiter")
+    testImplementation("io.mockk:mockk:1.12.3")
+}
+
+tasks.test {
+    useJUnitPlatform()
+    testLogging {
+        events("passed", "skipped", "failed")
+    }
 }
 
 tasks.withType<KotlinCompile>() {
diff --git a/src/test/kotlin/app/TestUtils.kt b/src/test/kotlin/app/TestUtils.kt
new file mode 100644
index 0000000..8fdc48c
--- /dev/null
+++ b/src/test/kotlin/app/TestUtils.kt
@@ -0,0 +1,26 @@
+package app
+
+import java.io.IOException
+import java.nio.file.Files
+import java.nio.file.Path
+import java.nio.file.Paths
+
+object TestUtils {
+    fun copyDir(src: String, dest: String) {
+        try {
+            Files.walk(Paths.get(src)).forEach { pathA: Path ->
+                val pathB: Path = Paths.get(dest, pathA.toString().substring(src.length))
+                try {
+                    if (pathA.toString() != src) Files.copy(
+                        pathA,
+                        pathB,
+                    )
+                } catch (e: IOException) {
+                    e.printStackTrace()
+                }
+            }
+        } catch (e: IOException) {
+            e.printStackTrace()
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/test/kotlin/app/git/BeforeRepoAllTestsExtension.kt b/src/test/kotlin/app/git/BeforeRepoAllTestsExtension.kt
new file mode 100644
index 0000000..c5ad37e
--- /dev/null
+++ b/src/test/kotlin/app/git/BeforeRepoAllTestsExtension.kt
@@ -0,0 +1,41 @@
+package app.git
+
+import app.credentials.GProcess
+import app.credentials.GRemoteSession
+import app.credentials.GSessionManager
+import kotlinx.coroutines.runBlocking
+import org.junit.jupiter.api.extension.AfterAllCallback
+import org.junit.jupiter.api.extension.BeforeAllCallback
+import org.junit.jupiter.api.extension.ExtensionContext
+import org.junit.jupiter.api.extension.ExtensionContext.Namespace.GLOBAL
+import java.io.File
+import kotlin.io.path.createTempDirectory
+
+private const val REPO_URL = "https://github.com/JetpackDuba/Gitnuro_TestsRepo.git"
+private val tempDirPath = createTempDirectory("gitnuro_")
+val tempDir: File = tempDirPath.toFile()
+lateinit var repoDir: File
+
+class BeforeRepoAllTestsExtension : BeforeAllCallback, AfterAllCallback {
+    private var started = false
+
+    override fun beforeAll(context: ExtensionContext) = runBlocking {
+        if (!started) {
+            repoDir = File(tempDir, "repo")
+
+            started = true
+            // Your "before all tests" startup logic goes here
+            // The following line registers a callback hook when the root test context is shut down
+            context.root.getStore(GLOBAL).put("any unique name", this)
+
+            val remoteOperationsManager = RemoteOperationsManager(GSessionManager { GRemoteSession { GProcess() } })
+            remoteOperationsManager.clone(repoDir, REPO_URL)
+        }
+    }
+
+    override fun afterAll(context: ExtensionContext?) {
+        // Your "after all tests" logic goes here
+
+        tempDir.deleteRecursively()
+    }
+}
diff --git a/src/test/kotlin/app/git/BranchesManagerTest.kt b/src/test/kotlin/app/git/BranchesManagerTest.kt
new file mode 100644
index 0000000..947a055
--- /dev/null
+++ b/src/test/kotlin/app/git/BranchesManagerTest.kt
@@ -0,0 +1,84 @@
+package app.git
+
+import app.TestUtils.copyDir
+import kotlinx.coroutines.runBlocking
+import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.lib.Repository
+import org.junit.jupiter.api.AfterEach
+import org.junit.jupiter.api.Assertions.*
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.extension.ExtendWith
+import java.io.File
+
+@ExtendWith(BeforeRepoAllTestsExtension::class)
+class BranchesManagerTest {
+    private lateinit var repo: Repository
+    private lateinit var git: Git
+    private lateinit var branchesManagerTestDir: File
+
+    @BeforeEach
+    fun setup() {
+        branchesManagerTestDir = File(tempDir, "branches_manager")
+        branchesManagerTestDir.mkdir()
+
+        copyDir(repoDir.absolutePath, branchesManagerTestDir.absolutePath)
+
+        repo = RepositoryManager().openRepository(branchesManagerTestDir)
+        git = Git(repo)
+    }
+
+    @AfterEach
+    fun clean() {
+        repo.close()
+        branchesManagerTestDir.deleteRecursively()
+    }
+
+    @org.junit.jupiter.api.Test
+    fun currentBranchRef() = runBlocking {
+        val branchesManager = BranchesManager()
+        val currentBranchRef = branchesManager.currentBranchRef(Git(repo))
+        assertEquals(currentBranchRef?.name, "refs/heads/main")
+    }
+
+    @org.junit.jupiter.api.Test
+    fun getBranches() = runBlocking {
+        val branchesManager = BranchesManager()
+        val branches = branchesManager.getBranches(git)
+        assertEquals(branches.count(), 1)
+        val containsMain = branches.any { it.name == "refs/heads/main" }
+        assert(containsMain) { println("Error: Branch main does not exist") }
+    }
+
+    @org.junit.jupiter.api.Test
+    fun createBranch() = runBlocking {
+        val branchName = "test"
+        val branchesManager = BranchesManager()
+        branchesManager.createBranch(git, branchName)
+
+        val branches = branchesManager.getBranches(git)
+        assertEquals(branches.count(), 2)
+        val containsNewBranch = branches.any { it.name == "refs/heads/$branchName" }
+
+        assert(containsNewBranch) { println("Error: Branch $branchName does not exist") }
+    }
+//
+//    @org.junit.jupiter.api.Test
+//    fun createBranchOnCommit() {
+//    }
+//
+//    @org.junit.jupiter.api.Test
+//    fun deleteBranch() {
+//    }
+//
+//    @org.junit.jupiter.api.Test
+//    fun deleteLocallyRemoteBranches() {
+//    }
+//
+//    @org.junit.jupiter.api.Test
+//    fun remoteBranches() {
+//    }
+//
+//    @org.junit.jupiter.api.Test
+//    fun checkoutRef() {
+//    }
+}
\ No newline at end of file