lnt importreport and/or lnt submit seem to disregard the test suite specified

[ldionne]

Reproducer:

# Create an instance and run a server
lnt create my-instance
cat <<EOF > my-instance/schemas/libcxx.yaml
format_version: '2'
name: libcxx
metrics:
- name: execution_time
  type: Real
  display_name: Execution Time
  unit: seconds
  unit_abbrev: s
run_fields:
- name: git_order
  order: true
machine_fields:
- name: hardware
- name: os
EOF
lnt runserver my-instance

cat <<EOF > x.lnt
foo.execution_time 1
bar.execution_time 2
EOF
lnt importreport --testsuite libcxx --order 1 --run-info git_order=99 --machine my-machine x.lnt x.json
lnt submit --testsuite libcxx http://localhost:8000/db_default/submitRun x.json

Based on this, I think the problem is in lnt submit, which seems to ignore the provided test suite.

[ldionne]

Ah, I think I understand. The command-line interface is super misleading. When using a URL for the server, --testsuite is ignored -- instead the test suite should be part of the URL endpoint. I can't get it to work though.

[ldionne]

Ok, it turns out that another problem is that we get an internal server error whenever llvm_project_revision is not the field marked as the order:

diff --git a/tests/lnttool/Inputs/libcxx-schema.yaml b/tests/lnttool/Inputs/libcxx-schema.yaml
new file mode 100644
index 0000000..4ee40bf
--- /dev/null
+++ b/tests/lnttool/Inputs/libcxx-schema.yaml
@@ -0,0 +1,14 @@
+format_version: '2'
+name: libcxx
+metrics:
+- name: execution_time
+  type: Real
+  display_name: Execution Time
+  unit: seconds
+  unit_abbrev: s
+run_fields:
+- name: git_order
+  order: true
+machine_fields:
+- name: hardware
+- name: os
diff --git a/tests/lnttool/submit.non-default-test-suite.shtest b/tests/lnttool/submit.non-default-test-suite.shtest
new file mode 100644
index 0000000..88d9e22
--- /dev/null
+++ b/tests/lnttool/submit.non-default-test-suite.shtest
@@ -0,0 +1,40 @@
+#!/bin/bash
+# RUN: rm -rf %t && mkdir -p %t
+# RUN: lnt create %t/instance
+# RUN: cp %S/Inputs/libcxx-schema.yaml %t/instance/schemas/libcxx.yaml
+# RUN: %{shared_inputs}/server_wrapper.sh --fail-on-error %t/instance 9097 \
+# RUN:    /bin/sh %s %t
+
+#
+# Make sure that we can submit to a test suite that isn't `nts`.
+#
+
+set -eux
+
+t="$1"
+HOST="http://localhost:9097"
+
+# Simple case
+cat <<EOF > "$t/report1.json"
+{
+    "format_version": "2",
+    "machine": {
+       "name": "machine-foo"
+    },
+    "run": {
+       "start_time": "2026-01-01T11:28:33.00000",
+       "end_time": "2026-01-01T11:28:23.991076",
+       "llvm_project_revision": "1",
+       "git_order": "1"
+    },
+    "tests": [
+       {
+           "name": "benchmark1",
+           "execution_time": [ 0.1056 ]
+       }
+    ]
+}
+EOF
+
+lnt submit "${HOST}/db_default/v4/libcxx/submitRun" "$t/report1.json"
+curl -sS "${HOST}/api/db_default/v4/libcxx/runs/1"