Added test for CheckoutRefUseCase

src/test/kotlin/com/jetpackduba/gitnuro/git/branches/CheckoutRefUseCaseTest.kt

@@ -0,0 +1,55 @@
+package com.jetpackduba.gitnuro.git.branches
+
+import com.jetpackduba.gitnuro.extensions.isBranch
+import com.jetpackduba.gitnuro.extensions.simpleName
+import io.mockk.*
+import kotlinx.coroutines.runBlocking
+import org.eclipse.jgit.api.CheckoutCommand
+import org.eclipse.jgit.api.CreateBranchCommand
+import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.lib.ObjectIdRef
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+
+class CheckoutRefUseCaseTest {
+    private val gitMock: Git = mockk()
+    private val refMock: ObjectIdRef.PeeledNonTag = mockk(relaxed = true)
+
+    @Test
+    fun `invokes git checkout when ref is a local branch`() {
+        val checkoutCommand = mockk<CheckoutCommand>(relaxed = true)
+        val branchName ="refs/heads/feature-branch"
+        every { refMock.name } returns branchName
+        every { gitMock.checkout() } returns checkoutCommand
+
+        every { checkoutCommand.setName(any()) } returns checkoutCommand
+
+        runBlocking {
+            CheckoutRefUseCase().invoke(gitMock, refMock)
+        }
+
+        verify { checkoutCommand.setName(branchName) }
+    }
+
+    @Test
+    fun `invokes git checkout when ref is a remote branch`() {
+        val checkoutCommand = mockk<CheckoutCommand>(relaxed = true)
+        val branchName = "refs/remotes/origin/feature-branch"
+        every { refMock.name } returns branchName
+        every { gitMock.checkout() } returns checkoutCommand
+
+        every { checkoutCommand.setCreateBranch(true) } returns checkoutCommand
+        every { checkoutCommand.setStartPoint(any() as String) } returns checkoutCommand
+        every { checkoutCommand.setUpstreamMode(CreateBranchCommand.SetupUpstreamMode.SET_UPSTREAM) } returns checkoutCommand
+
+        runBlocking {
+            CheckoutRefUseCase().invoke(gitMock, refMock)
+        }
+
+        verify {
+            checkoutCommand.setCreateBranch(true)
+            checkoutCommand.setStartPoint(branchName)
+            checkoutCommand.setUpstreamMode(CreateBranchCommand.SetupUpstreamMode.SET_UPSTREAM)
+        }
+    }
+}