Add end-to-end Test

- Add an infrastructur to run local e2e tests.
- Add some tests.

e2e-tests/local_run.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/bash
+
+cargo build --release
+
+docker run -ti \
+  --rm \
+  --mount type=bind,src=$(pwd),dst=/opt/husk/mapped/ \
+  localhost/mta \
+  bash -c "/usr/bin/prepare.sh && bash /opt/husk/mapped/e2e-tests/runner.sh"
+

e2e-tests/runner.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/bash
+
+cd $(dirname $0)
+
+for TEST in ./tests/* ; do
+  if bash $TEST ; then
+    echo "success"
+  else
+    echo "failure"
+    exit 1 
+  fi
+done

e2e-tests/tests/10_basic.sh

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+#!/usr/bin/bash
+
+echo "Basic: Test if MTA is working"
+
+adduser --shell /bin/bash --disabled-password --gecos "" mtatest
+echo "test mail" | sendmail mtatest@example.com
+
+sleep 1
+
+if [ -f /var/mail/mtatest ] ; then
+  RESULT_CODE=0
+else
+  RESULT_CODE=1 
+fi
+
+deluser --remove-home mtatest
+
+exit $RESULT_CODE

e2e-tests/tests/20_simple_encrypt.sh

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+#!/usr/bin/bash
+
+echo "Simple: Test encryption for available certificate"
+
+# There is an authenticated certificate for bob in the cert store
+adduser --shell /bin/bash --disabled-password --gecos "" bob
+echo "test mail" | sendmail bob@example.com
+
+sleep 1
+
+if [ -f /var/mail/bob ] ; then
+  if grep -q "BEGIN PGP MESSAGE" /var/mail/bob ; then
+    RESULT_CODE=0
+  else
+    echo "no encryption detected"
+    RESULT_CODE=1
+  fi
+else
+  echo "no mail detected"
+  RESULT_CODE=1 
+fi
+
+deluser --remove-home bob
+
+exit $RESULT_CODE

e2e-tests/tests/21_simple_not_encrypt.sh

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+#!/usr/bin/bash
+
+echo "Simple: Test encryption for unavailable certificate"
+
+# There is no authenticated certificate for alice in the cert store
+adduser --shell /bin/bash --disabled-password --gecos "" alice
+echo "test mail" | sendmail alice@example.com
+
+sleep 1
+
+if [ -f /var/mail/alice ] ; then
+  if grep -q "BEGIN PGP MESSAGE" /var/mail/alice ; then
+    echo "encryption detected - that is wrong"
+    RESULT_CODE=1
+  else
+    RESULT_CODE=0
+  fi
+else
+  echo "no mail detected"
+  RESULT_CODE=1 
+fi
+
+deluser --remove-home alice
+
+exit $RESULT_CODE

e2e-tests/tests/30_fetch.sh

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+#!/usr/bin/bash
+
+echo "Test encryption for certificate an a keyserver"
+
+# There is a certificate for carol on the keyserver
+# it's certified by an introducer
+adduser --shell /bin/bash --disabled-password --gecos "" carol
+echo "test mail" | sendmail carol@example.com
+
+sleep 1
+
+if [ -f /var/mail/carol ] ; then
+  if grep -q "BEGIN PGP MESSAGE" /var/mail/carol ; then
+    RESULT_CODE=0
+  else
+    echo "no encryption detected"
+    RESULT_CODE=1
+  fi
+else
+  echo "no mail detected"
+  RESULT_CODE=1 
+fi
+
+deluser --remove-home carol
+
+exit $RESULT_CODE