Add system test for repo with SHA512-only checksums

system/t04_mirror/UpdateMirror22Test_gold

@@ -0,0 +1,11 @@
+Downloading https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64/InRelease...
+openpgp:  RSA key ID C45B1676A04EA552
+openpgp: Good signature from "NVIDIA CORPORATION (Open Source Projects) <cudatools@nvidia.com>"
+Downloading & parsing package files...
+Downloading https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64/Packages.xz...
+Applying filter...
+Packages filtered: 8 -> 0.
+Building download queue...
+Download queue: 0 items (0 B)
+
+Mirror `libnvidia-container` has been successfully updated.

system/t04_mirror/update.py

@@ -360,3 +360,16 @@ class UpdateMirror21Test(BaseTest):
 
     def output_processor(self, output):
         return "\n".join(line for line in output.split("\n") if ".deb" not in line)
+
+
+class UpdateMirror22Test(BaseTest):
+    """
+    update mirrors: SHA512 checksums only
+    """
+    configOverride = {"gpgProvider": "internal"}
+    fixtureGpg = True
+    fixtureCmds = [
+        "aptly mirror create --keyring=aptlytest.gpg --filter=nomatch libnvidia-container https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64 ./"
+    ]
+    runCmd = "aptly mirror update --keyring=aptlytest.gpg libnvidia-container"
+    outputMatchPrepare = filterOutSignature