Add integration test

tests/load.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+#
+# Test that we can emit per-cpu load data properly.
+
+set -e
+
+( cd .. ; cargo build )
+loadlines=$(../target/debug/sonar ps --load | grep ',load=' | wc -l)
+if [[ $loadlines -ne 1 ]]; then
+    echo "Did not emit load data properly - not exactly 1"
+    exit 1
+fi
+
+loadlines=$(../target/debug/sonar ps | grep ',load=' | wc -l)
+if [[ $loadlines -ne 0 ]]; then
+    echo "Did not emit load data properly - not exactly 0"
+    exit 1
+fi

tests/run_tests.sh

@@ -20,6 +20,7 @@ for test in command-line \
                 exclude-users \
                 hostname \
                 interrupt \
+                load \
                 lockfile \
                 min-cpu-time \
                 ps-syntax \