Add line number assert function

include/testing.sh

@@ -2,6 +2,22 @@
 
 ffoo import core
 
+assert_linecount() {
+    #
+    # Assert that count of lines in $1 is $2
+    #
+    local ex file num
+    file="$1"
+    ex="$@"
+    case $ex in
+        [0-9]*) ex="-eq $ex" ;;
+        -*)     true         ;;
+        *)      usage_is -l "FILE EXPR" \
+                            "FILE NUM" ;;
+    esac
+    test 0$(wc -l <$file) $2
+}
+
 collect_artifacts() {
     #
     # Collect everything that is registered as artifact