Added a command-line test runner named test/run

test/run

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+LEDGER=ledger
+ARGS="--args-only --no-color --columns=80"
+
+output_only=false
+update_test=false
+if [[ "$1" == "-v" ]]; then
+    output_only=true
+    shift 1
+elif [[ "$1" == "-u" ]]; then
+    update_test=true
+    shift 1
+fi
+
+COMMAND=$(perl -ne 'print unless /^<<</ .. eof();' $1)
+
+if [[ $output_only == false && $update_test == false ]]; then
+    perl -ne 'print unless 1 .. /^>>>/ or /^(===|>>>2)/ .. eof();' $1 > /tmp/expected.$$
+fi
+
+perl -ne 'print unless 1 .. /^<<</ or /^>>>/ .. eof();' $1 \
+    | eval "$LEDGER -f - -o /tmp/received.$$ $ARGS $COMMAND"
+
+if [[ $update_test == true ]]; then
+    if [[ -f /tmp/received.$$ ]]; then
+        perl -ne 'print if 1 .. /^>>>/;' $1 > /tmp/command.$$
+        perl -ne 'print if /^(===|>>>2)/ .. eof();' $1 > /tmp/epilog.$$
+        cat /tmp/command.$$ /tmp/received.$$ /tmp/epilog.$$ > replace.$$
+        mv replace.$$ $1
+        /bin/rm -f /tmp/command.$$ /tmp/received.$$ /tmp/epilog.$$
+        echo Test updated.
+    fi
+    
+elif [[ $output_only == false ]]; then
+    if [[ -f /tmp/expected.$$ && -f /tmp/received.$$ ]]; then
+        diff -w -U3 /tmp/expected.$$ /tmp/received.$$ && echo Test passed.
+    fi
+else
+    if [[ -f /tmp/received.$$ ]]; then
+        cat /tmp/received.$$
+    fi
+fi
+
+/bin/rm -f /tmp/expected.$$ /tmp/received.$$