t/1702-mshow-attachments.t: add tests for named part/attachment detection

t/1702-mshow-attachments.t

@@ -0,0 +1,53 @@
+#!/bin/sh -e
+cd ${0%/*}
+. ./lib.sh
+plan 2
+
+# Different naming scenarios for named parts
+cat <<EOF >tmp
+Content-Type: multipart/mixed; boundary=----_NextPart_000_00DE_01D6A2E8.A7446C80
+
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+
+no header, part is not attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+Content-Type: text/plain; charset=UTF-8
+
+CT w/o name, part is not attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+Content-Type: text/plain; charset=UTF-8; name="ctn.txt"
+
+CT with name, part is attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+Content-Disposition: attachment
+
+CD w/o filename, part is not attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+Content-Type: text/plain; charset=UTF-8
+Content-Disposition: attachment
+
+CD w/o filename, CT w/o name, part is not attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+Content-Type: text/plain; charset=UTF-8; name="cd_ctn.txt"
+Content-Disposition: attachment
+
+CD w/o filename, CT with name, part is attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+Content-Disposition: attachment; filename="cdf.txt"
+
+CD with filename, part is attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+Content-Type: text/plain; charset=UTF-8; name="cdf_ct.txt"
+Content-Disposition: attachment
+
+CD with filename, CT w/o name, part is attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80
+Content-Type: text/plain; charset=UTF-8; name="cdf_ctn.txt"
+Content-Disposition: attachment; filename="cdf_ctn.txt"
+
+CD with filename, CT with name, part is attachment
+------_NextPart_000_00DE_01D6A2E8.A7446C80--
+EOF
+
+check 'mail has 10 parts' 'mshow -t ./tmp | wc -l | grep 11'
+check 'mail has 5 named parts/attachments' 'mshow -t ./tmp | grep .*name=\".*\" | wc -l | grep 5'