Open app editor for interactive rebase todo

app/src/test/java/solutions/tretter/githugandroid/GitEditorCommandsTest.kt

@@ -23,6 +23,19 @@ class GitEditorCommandsTest {
         assertNull(parseGitEditorInvocation("git commit --amend --no-edit"))
     }
 
+    @Test
+    fun interactiveRebaseOpensTodoEditor() {
+        val invocation = parseGitEditorInvocation("git rebase -i HEAD~3")
+
+        assertEquals(GitEditorCommandKind.REBASE_TODO, invocation?.kind)
+        assertEquals("Edit Rebase Todo", invocation?.title)
+    }
+
+    @Test
+    fun bareInteractiveRebaseDoesNotOpenTodoEditor() {
+        assertNull(parseGitEditorInvocation("git rebase -i"))
+    }
+
     @Test
     fun annotatedTagWithoutMessageOpensEditor() {
         val invocation = parseGitEditorInvocation("git tag -a v1.0")

app/src/test/java/solutions/tretter/githugandroid/GitSandboxEngineTest.kt

@@ -382,6 +382,35 @@ class GitSandboxEngineTest {
         }
     }
 
+    @Test
+    fun nativeInteractiveRebaseUsesAppSequenceEditorContent() {
+        val git = testGitBinary()
+        assumeTrue(git.exists() && git.canExecute())
+        val root = Files.createTempDirectory("githug-interactive-rebase-editor").toFile()
+        try {
+            val runtime = GitRepositoryRuntime(root, git)
+            val level = reorderLevel()
+            val repo = runtime.prepareLevel(level)
+            val invocation = parseGitEditorInvocation("git rebase -i HEAD~3")
+                ?: error("Expected interactive rebase editor invocation")
+            val todo = runtime.gitEditorInitialContent(level, repo, invocation)
+            val reorderedTodo = todo.lines().toMutableList().also { lines ->
+                val secondPick = lines.indexOfFirst { it.contains("Third commit") }
+                val thirdPick = lines.indexOfFirst { it.contains("Second commit") }
+                val thirdLine = lines[thirdPick]
+                lines[thirdPick] = lines[secondPick]
+                lines[secondPick] = thirdLine
+            }.joinToString("\n")
+
+            val (updatedRepo, output) = runtime.executeGitEditorCommand(level, repo, invocation, reorderedTodo)
+
+            assertFalse(output.any { it.contains("Terminal is dumb", ignoreCase = true) })
+            assertTrue(level.validator(updatedRepo, invocation.command))
+        } finally {
+            root.deleteRecursively()
+        }
+    }
+
     private fun testGitBinary(): File {
         System.getenv("GITHUG_TEST_GIT_BINARY")
             ?.takeIf { it.isNotBlank() }