Add test for GitHub Issue #38

Use an ODT file (instead of PDF) as this is natively handled with
Dovecot without needing to install PDF helpers on the OS.

.github/actions/flatcurve-test-debian/Dockerfile

@@ -28,7 +28,8 @@ RUN apt-get update && apt-get install -y \
 	libexttextcat-dev \
 	libicu-dev \
 	libxapian-dev \
-	dovecot-imaptest
+	dovecot-imaptest \
+	poppler-utils
 
 # We need to build Dovecot ourselves, since "standard" Dovecot does not
 # come with necessary ICU libraries built-in

.github/common/configs/dovecot.conf.issue-38

@@ -0,0 +1,12 @@
+!include /dovecot/configs/dovecot.conf
+
+plugin {
+  fts_decoder = decode2text
+}
+
+service decode2text {
+  executable = script /usr/local/libexec/dovecot/decode2text.sh
+  unix_listener decode2text {
+    mode = 0666
+  }
+}

.github/common/fts-flatcurve-test.sh

@@ -195,6 +195,10 @@ run_doveadm "fts-flatcurve stats -A rotatetest"
 # TODO: Scan for expected input
 echo "Success!"
 
+run_test "Testing GitHub Issue #38" \
+	/dovecot/configs/dovecot.conf.issue-38 \
+	/dovecot/imaptest/issue-38/issue-38
+
 TESTBOX=INBOX
 echo
 echo "Testing 'doveadm fts-flatcurve remove'"
@@ -210,6 +214,7 @@ for m in imaptest
 do
 	populate_mbox_msg ${m} "Subject: msg1\n\nbody2\n"
 done
+
 run_test "Testing virtual search" \
 	/dovecot/configs/dovecot.conf.virtual \
 	/dovecot/imaptest/virtual

.github/common/imaptest/issue-38/default.mbox

@@ -0,0 +1,63 @@
+From user-from@domain  Tue Jan  3 13:45:19 2023
+From: user-from@domain.org
+To: user-to@example.org
+Subject: test
+X-Foo: test2
+MIME-Version: 1.0
+Content-Type: multipart/mixed; boundary=1234abcd
+
+--1234abcd
+Content-Transfer-Encoding: base64
+
+Ym9keWJvZHkK
+
+--1234abcd
+Content-Type: application/vnd.oasis.opendocument.text; name="test.odt"
+Content-Disposition: attachment; filename="test.odt"
+Content-Transfer-Encoding: base64
+
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+
+--1234abcd--

.github/common/imaptest/issue-38/issue-38

@@ -0,0 +1,18 @@
+messages: all
+
+ok search body bodybody
+* search 1
+ok search body attachment
+* search 1
+ok search body test2
+* search
+ok search or body test2 header x-foo test2
+* search 1
+ok search or body attachment header x-foo test2
+* search 1
+ok search or body attachment header x-foo baz
+* search 1
+ok search body bodybody header x-foo test2
+* search 1
+ok search body attachment header x-foo test2
+* search 1