tests/functional: Convert some tests that download files via fetch_asset()

Now that we've got the Asset class with pre-caching, we can convert
some Avocado tests that use fetch_asset() for downloading their
required files.

Message-ID: <20240830133841.142644-18-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional/test_netdev_ethtool.py

@@ -0,0 +1,88 @@
+#!/usr/bin/env python3
+#
+# ethtool tests for emulated network devices
+#
+# This test leverages ethtool's --test sequence to validate network
+# device behaviour.
+#
+# SPDX-License-Identifier: GPL-2.0-or-late
+
+from unittest import skip
+from qemu_test import QemuSystemTest, Asset
+from qemu_test import wait_for_console_pattern
+
+class NetDevEthtool(QemuSystemTest):
+
+    # Runs in about 17s under KVM, 19s under TCG, 25s under GCOV
+    timeout = 45
+
+    # Fetch assets from the netdev-ethtool subdir of my shared test
+    # images directory on fileserver.linaro.org.
+    ASSET_BASEURL = ('https://fileserver.linaro.org/s/kE4nCFLdQcoBF9t/'
+                     'download?path=%2Fnetdev-ethtool&files=')
+    ASSET_BZIMAGE = Asset(
+        ASSET_BASEURL + "bzImage",
+        "ed62ee06ea620b1035747f3f66a5e9fc5d3096b29f75562ada888b04cd1c4baf")
+    ASSET_ROOTFS = Asset(
+        ASSET_BASEURL + "rootfs.squashfs",
+        "8f0207e3c4d40832ae73c1a927e42ca30ccb1e71f047acb6ddb161ba422934e6")
+
+    def common_test_code(self, netdev, extra_args=None):
+        self.set_machine('q35')
+
+        # This custom kernel has drivers for all the supported network
+        # devices we can emulate in QEMU
+        kernel = self.ASSET_BZIMAGE.fetch()
+        rootfs = self.ASSET_ROOTFS.fetch()
+
+        append = 'printk.time=0 console=ttyS0 '
+        append += 'root=/dev/sr0 rootfstype=squashfs '
+
+        # any additional kernel tweaks for the test
+        if extra_args:
+            append += extra_args
+
+        # finally invoke ethtool directly
+        append += ' init=/usr/sbin/ethtool -- -t eth1 offline'
+
+        # add the rootfs via a readonly cdrom image
+        drive = f"file={rootfs},if=ide,index=0,media=cdrom"
+
+        self.vm.add_args('-kernel', kernel,
+                         '-append', append,
+                         '-drive', drive,
+                         '-device', netdev)
+
+        self.vm.set_console(console_index=0)
+        self.vm.launch()
+
+        wait_for_console_pattern(self,
+                                 "The test result is PASS",
+                                 "The test result is FAIL",
+                                 vm=None)
+        # no need to gracefully shutdown, just finish
+        self.vm.kill()
+
+    def test_igb(self):
+        self.common_test_code("igb")
+
+    def test_igb_nomsi(self):
+        self.common_test_code("igb", "pci=nomsi")
+
+    # It seems the other popular cards we model in QEMU currently fail
+    # the pattern test with:
+    #
+    #   pattern test failed (reg 0x00178): got 0x00000000 expected 0x00005A5A
+    #
+    # So for now we skip them.
+
+    @skip("Incomplete reg 0x00178 support")
+    def test_e1000(self):
+        self.common_test_code("e1000")
+
+    @skip("Incomplete reg 0x00178 support")
+    def test_i82550(self):
+        self.common_test_code("i82550")
+
+if __name__ == '__main__':
+    QemuSystemTest.main()