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() }

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

@@ -130,6 +130,15 @@ class LevelSolutionsTest {
             "Starting an interactive rebase without an upstream/range must not solve the reorder level.",
             reorderExercise.validator(bareInteractiveRebaseRepo, "git rebase -i"),
         )
+
+        val futureCommitExercise = commitInFutureLevel()
+        val futureCommitRuntime = GitRepositoryRuntime(runtimeRoot, gitBinary)
+        val futureCommitRepo = futureCommitRuntime.prepareLevel(futureCommitExercise)
+        val (currentDateCommitRepo, _) = futureCommitRuntime.execute(futureCommitExercise, futureCommitRepo, "git commit -m \"Current date commit\"")
+        assertFalse(
+            "A normal commit using the current system date must not solve the commit_in_future level.",
+            futureCommitExercise.validator(currentDateCommitRepo, "git commit -m \"Current date commit\""),
+        )
     }
 
     private companion object {
@@ -213,7 +222,7 @@ class LevelSolutionsTest {
                 appendLine("  <none>")
             } else {
                 commits.forEach { commit ->
-                    appendLine("  ${commit.id} ${commit.message}")
+                    appendLine("  ${commit.id} ${commit.authorTimestampSeconds ?: "unknown-time"} ${commit.message}")
                 }
             }
         }