unitfixes (#3)

- fix regex match padding
- fix key copying
- add more unit tests

.woodpecker/test.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+yq '.steps.test-gdbm.commands' < .woodpecker/build.yaml \
+    | grep -- - | grep -v apk | sed 's/^\- //' \
+ | while read COMMAND; do
+    echo "$COMMAND" | bash -e > debug.log 2>&1
+    if test $? -ne 0; then
+        echo "fail - $COMMAND"
+        if test -s debug.log; then
+            cat debug.log
+        else
+            echo exit 1
+        fi
+    else
+        echo "ok   - $COMMAND"
+    fi
+done
+
+rm -f debug.log