Make bisect playable and validate commit_in_future using Git author timestamps

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

@@ -411,6 +411,24 @@ class GitSandboxEngineTest {
         }
     }
 
+    @Test
+    fun nativeExecutableShortcutRunsScriptThroughShell() {
+        val git = testGitBinary()
+        assumeTrue(git.exists() && git.canExecute())
+        val root = Files.createTempDirectory("githug-script-shortcut").toFile()
+        try {
+            val runtime = GitRepositoryRuntime(root, git)
+            val level = bisectLevel()
+            val repo = runtime.prepareLevel(level)
+
+            val (_, output) = runtime.execute(level, repo, "./test-balance.sh")
+
+            assertTrue(output.joinToString("\n"), output.any { it.contains("balance broken") })
+        } finally {
+            root.deleteRecursively()
+        }
+    }
+
     private fun testGitBinary(): File {
         System.getenv("GITHUG_TEST_GIT_BINARY")
             ?.takeIf { it.isNotBlank() }