tests: Add more side cases for exec command

tests/integration/test_sandbox.py

@@ -46,12 +46,87 @@ def test_exec_returns_error_when_container_not_running():
     assert "not running" in out.lower()
 
 
+def test_exec_instant_command(sandbox: DockerSandbox):
+    code, out = sandbox.exec("true")
+    assert code == 0
+    assert out == ""
+
+
+def test_exec_instant_nonzero(sandbox: DockerSandbox):
+    code, _ = sandbox.exec("false")
+    assert code == 1
+
+
+def test_exec_delayed_command_within_timeout(sandbox: DockerSandbox):
+    code, out = sandbox.exec("sleep 1 && echo done", timeout=10)
+    assert code == 0
+    assert "done" in out
+
+
 def test_exec_timeout(sandbox: DockerSandbox):
     code, out = sandbox.exec("sleep 60", timeout=2)
     assert code == 124
     assert "timed out" in out
 
 
+def test_exec_timeout_longer_than_sleep(sandbox: DockerSandbox):
+    # Command finishes before timeout — must not raise or return 124.
+    code, out = sandbox.exec("sleep 1 && echo ok", timeout=10)
+    assert code == 0
+    assert "ok" in out
+
+
+def test_exec_and_chain_both_succeed(sandbox: DockerSandbox):
+    code, out = sandbox.exec("echo first && echo second")
+    assert code == 0
+    assert "first" in out
+    assert "second" in out
+
+
+def test_exec_and_chain_short_circuits_on_failure(sandbox: DockerSandbox):
+    code, out = sandbox.exec("false && echo should_not_print")
+    assert code != 0
+    assert "should_not_print" not in out
+
+
+def test_exec_pipe(sandbox: DockerSandbox):
+    code, out = sandbox.exec("echo hello world | tr ' ' '_'")
+    assert code == 0
+    assert "hello_world" in out
+
+
+def test_exec_pipe_exit_code_is_last_command(sandbox: DockerSandbox):
+    # grep finds no match → exit 1, even though echo succeeded
+    code, _ = sandbox.exec("echo hello | grep nomatch")
+    assert code == 1
+
+
+def test_exec_stdout_redirect_to_file(sandbox: DockerSandbox, workdir: str):
+    code, out = sandbox.exec(f"echo redirected > {workdir}/out.txt && cat {workdir}/out.txt")
+    assert code == 0
+    assert "redirected" in out
+
+
+def test_exec_stderr_redirect_to_stdout(sandbox: DockerSandbox):
+    code, out = sandbox.exec("echo err_msg >&2 2>&1")
+    assert code == 0
+    assert "err_msg" in out
+
+
+def test_exec_subshell(sandbox: DockerSandbox):
+    code, out = sandbox.exec("result=$(echo inner) && echo $result")
+    assert code == 0
+    assert "inner" in out
+
+
+def test_exec_multiline_via_semicolons(sandbox: DockerSandbox):
+    code, out = sandbox.exec("echo a; echo b; echo c")
+    assert code == 0
+    assert "a" in out
+    assert "b" in out
+    assert "c" in out
+
+
 def test_exec_working_dir_respected():
     """When working_dir is set, exec uses it as cwd."""
     sb = DockerSandbox(