[PATCH 1/3] test: Prepare for tunbridge based tests

[David Gibson <david@gibson.dropbear.id.au>]

I plan to start converting many of our tests to the tunbridge[0] network
simulator framework.  This is the first step: downloading and setting up
tunbridge to work within our test scripts.  It also introduces a 'tasst'
Python library for code that we might want to reuse across various
tunbridge based tests.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 test/.gitignore        |  2 ++
 test/Makefile          | 19 +++++++++++--------
 test/run               |  2 +-
 test/smoke/smoke.py    | 26 ++++++++++++++++++++++++++
 test/tasst/__init__.py | 10 ++++++++++
 5 files changed, 50 insertions(+), 9 deletions(-)
 create mode 100755 test/smoke/smoke.py
 create mode 100644 test/tasst/__init__.py

diff --git a/test/.gitignore b/test/.gitignore
index 9412f0d3..71409c51 100644
--- a/test/.gitignore
+++ b/test/.gitignore
@@ -12,4 +12,6 @@ rampstream
 guest-key
 guest-key.pub
 /exeter/
+/tunbridge/
 *.bats
+__pycache__/
diff --git a/test/Makefile b/test/Makefile
index 5b5f0fc1..f66c7e7e 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -54,7 +54,7 @@ UBUNTU_NEW_IMGS = xenial-server-cloudimg-powerpc-disk1.img \
 	jammy-server-cloudimg-s390x.img
 UBUNTU_IMGS = $(UBUNTU_OLD_IMGS) $(UBUNTU_NEW_IMGS)
 
-DOWNLOAD_ASSETS = $(EXETOOL) mbuto podman \
+DOWNLOAD_ASSETS = $(EXETOOL) tunbridge mbuto podman \
 	$(DEBIAN_IMGS) $(FEDORA_IMGS) $(OPENSUSE_IMGS) $(UBUNTU_IMGS)
 TESTDATA_ASSETS = small.bin big.bin medium.bin \
 	rampstream
@@ -65,15 +65,15 @@ LOCAL_ASSETS = mbuto.img mbuto.mem.img podman/bin/podman QEMU_EFI.fd \
 
 ASSETS = $(DOWNLOAD_ASSETS) $(LOCAL_ASSETS)
 
-EXETER_PYPATH = exeter/py3
-EXETER_PYTHON = build/build.py
-EXETER_BATS = smoke/smoke.sh.bats \
-	$(EXETER_PYTHON:%=%.bats) build/static_checkers.sh.bats
+EXETER_SH = smoke/smoke.sh build/static_checkers.sh
+EXETER_PYPATH = exeter/py3:tunbridge/:.
+EXETER_PYTHON = smoke/smoke.py build/build.py
+EXETER_BATS = $(EXETER_SH:%=%.bats) $(EXETER_PYTHON:%=%.bats)
 BATS_FILES = $(EXETER_BATS) \
 	podman/test/system/505-networking-pasta.bats
 
 # Python test code (for linters)
-PYPKGS = $(EXETER_PYTHON)
+PYPKGS = $(EXETER_PYTHON) tasst
 
 CFLAGS = -Wall -Werror -Wextra -pedantic -std=c99
 
@@ -88,6 +88,9 @@ exeter:
 
 exeter/exetool/exetool: pull-exeter
 
+tunbridge:
+	git clone https://gitlab.com/dgibson/tunbridge.git
+
 mbuto:
 	git clone git://mbuto.sh/mbuto
 
@@ -139,7 +142,7 @@ flake8: pull-exeter
 mypy: pull-exeter
 	PYTHONPATH=$(EXETER_PYPATH) $(MYPY) $(PYPKGS)
 
-$(EXETER_BATS): %.bats: % $(EXETOOL)
+$(EXETER_BATS): %.bats: % $(EXETOOL) pull-tunbridge
 	PYTHONPATH=$(EXETER_PYPATH) $(EXETOOL) bats -- $< > $@
 
 bats: $(BATS_FILES) pull-podman
@@ -153,7 +156,7 @@ debug: assets
 
 clean:
 	rm -f perf.js *~
-	rm -rf .mypy_cache
+	rm -rf .mypy_cache __pycache__
 	rm -f $(LOCAL_ASSETS)
 	rm -f $(EXETER_BATS)
 	rm -rf test_logs
diff --git a/test/run b/test/run
index f858e558..3872a56e 100755
--- a/test/run
+++ b/test/run
@@ -44,7 +44,7 @@ KERNEL=${KERNEL:-"/boot/vmlinuz-$(uname -r)"}
 COMMIT="$(git log --oneline --no-decorate -1)"
 
 # Let exeter tests written in Python find their modules
-export PYTHONPATH=${BASEPATH}/exeter/py3
+export PYTHONPATH=${BASEPATH}/exeter/py3:${BASEPATH}/tunbridge:${BASEPATH}
 
 . lib/util
 . lib/context
diff --git a/test/smoke/smoke.py b/test/smoke/smoke.py
new file mode 100755
index 00000000..cbf77ad9
--- /dev/null
+++ b/test/smoke/smoke.py
@@ -0,0 +1,26 @@
+#! /usr/bin/env python3
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# test/smoke/smoke.py - Python smoke tests
+#
+# Copyright Red Hat
+# Author: David Gibson <david@gibson.dropbear.id.au>
+
+import exeter
+
+
+@exeter.test
+def py_test_libraries() -> None:
+    """Check test in Python have access to the libraries we need"""
+
+    import tunbridge
+    import tasst
+
+    print(f"Imported exeter: {exeter}")
+    print(f"Imported tunbridge: {tunbridge}")
+    print(f"Imported tasst: {tasst}")
+
+
+if __name__ == '__main__':
+    exeter.main()
diff --git a/test/tasst/__init__.py b/test/tasst/__init__.py
new file mode 100644
index 00000000..fd4fe9a8
--- /dev/null
+++ b/test/tasst/__init__.py
@@ -0,0 +1,10 @@
+#! /usr/bin/env python3
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# TASST - Test A Simple Socket Transport
+#
+# test/tasst/__init.py__ - Python library code useful for test cases
+#
+# Copyright Red Hat
+# Author: David Gibson <david@gibson.dropbear.id.au>
-- 
2.51.0