[PATCH] test: add known broken test for indexing html

[David Bremner]

'quite' on IRC reported that notmuch new was grinding to a halt during
initial indexing, and we eventually narrowed the problem down to some
html parts with large embedded images. These cause the number of terms
added to the Xapian database to explode (the first 400 messages
generated 4.6M unique terms), and of course the resulting terms are
not much use for searching.
---

I'm not sure the best approach to fix this. Workarounds include
limiting the size of the part indexed, and skipping html parts. The
latter is easy, but probably too drastic.  A nice solution might be a
filter similar to the existing one that strips out uuencoded text but
for base64. Alas base64 crud seems to come with all kinds of syntactic
wrappers, so it's probably harder to filter.


 test/T680-html-indexing.sh       | 12 +++++++
 test/corpora/README              |  3 ++
 test/corpora/html/embedded-image | 69 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 84 insertions(+)
 create mode 100755 test/T680-html-indexing.sh
 create mode 100644 test/corpora/html/embedded-image

diff --git a/test/T680-html-indexing.sh b/test/T680-html-indexing.sh
new file mode 100755
index 00000000..78768c4f
--- /dev/null
+++ b/test/T680-html-indexing.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+test_description="indexing of html parts"
+. ./test-lib.sh || exit 1
+
+add_email_corpus html
+
+test_begin_subtest 'embedded images should not be indexed'
+test_subtest_known_broken
+notmuch search kwpza7svrgjzqwi8fhb2msggwtxtwgqcxp4wbqr4wjddstqmeqa7 > OUTPUT
+test_expect_equal_file /dev/null OUTPUT
+
+test_done
diff --git a/test/corpora/README b/test/corpora/README
index 77c48e6e..c9a35fed 100644
--- a/test/corpora/README
+++ b/test/corpora/README
@@ -9,3 +9,6 @@ default
 broken
   The broken corpus contains messages that are broken and/or RFC
   non-compliant, ensuring we deal with them in a sane way.
+
+html
+  The html corpus contains html parts
diff --git a/test/corpora/html/embedded-image b/test/corpora/html/embedded-image
new file mode 100644
index 00000000..40851530
--- /dev/null
+++ b/test/corpora/html/embedded-image
@@ -0,0 +1,69 @@
+From: =?utf-8?b?bWFsbW9ib3Jn?= <daemon at lublin.se>
+To: =?utf-8?b?Ym9lbmRlLm1hbG1vYm9yZw==?= <daemon at lublin.se>
+Date: Tue, 19 Jul 2016 11:54:24 +0200
+X-Feed2Imap-Version: 1.2.5
+Message-Id: <boendemalmoborg-1834 at eltanin.uberspace.de>
+Subject: =?utf-8?b?VGFjayBhbGxhIHRyYWZpa2FudGVyIG9jaCBmb3Rnw6RuZ2FyZSE=?=
+Content-Type: multipart/alternative; boundary="=-1468922508-176605-12427-9500-21-="
+MIME-Version: 1.0
+
+
+--=-1468922508-176605-12427-9500-21-=
+Content-Type: text/plain; charset=utf-8; format=flowed
+Content-Transfer-Encoding: 8bit
+
+<http://malmoborg.se/2016/07/tack-alla-trafikanter-och-fotgangare/>
+
+Malmö 2016-07-09
+
+I skrivande stund är vi i färd med att avetablera vår entreprenad på 
+Tigern 3, Regementsgatan 6 i Malmö. Fastigheten har genomgått ett större 
+dräneringsarbete som i sin tur har inneburit vissa 
+trafikbegränsningar på Regementsgatan samt Davidshallsgatan under några 
+veckors tid. Fastighetsägaren är mycket nöjd med vår arbetsinsats och vi 
+kan glatt meddela att båda vägfilerna kommer att öppnas inom kort. Nu 
+kommer den vackra fastigheten att klara sig torrskodd under många år 
+framöver [A]
+
+ 
+
+[A] http://malmoborg.se/wp-includes/images/smilies/icon_smile.gif
+-- 
+Feed: Förvaltnings AB Malmöborg
+<http://malmoborg.se>
+Item: Tack alla trafikanter och fotgängare!
+<http://malmoborg.se/2016/07/tack-alla-trafikanter-och-fotgangare/>
+Date: 2016-07-19 11:54:24 +0200
+Author: malmoborg
+Filed under: Nyheter
+
+--=-1468922508-176605-12427-9500-21-=
+Content-Type: text/html; charset=utf-8
+Content-Transfer-Encoding: 8bit
+
+<table border="1" width="100%" cellpadding="0" cellspacing="0" borderspacing="0"><tr><td>
+<table width="100%" bgcolor="#EDEDED" cellpadding="4" cellspacing="2">
+<tr><td align="right"><b>Feed:</b></td>
+<td width="100%"><a href="http://malmoborg.se">
+<b>Förvaltnings AB Malmöborg</b>
+</a>
+</td></tr><tr><td align="right"><b>Item:</b></td>
+<td width="100%"><a href="http://malmoborg.se/2016/07/tack-alla-trafikanter-och-fotgangare/"><b>Tack alla trafikanter och fotgängare!</b>
+</a>
+</td></tr></table></td></tr></table>
+
+<p>Malmö 2016-07-09</p>
+<p>I skrivande stund är vi i färd med att avetablera vår entreprenad på Tigern 3, Regementsgatan 6 i Malmö. Fastigheten har genomgått ett större dräneringsarbete som i sin tur har inneburit vissa trafikbegränsningar på Regementsgatan samt Davidshallsgatan under några veckors tid. Fastighetsägaren är mycket nöjd med vår arbetsinsats och vi kan glatt meddela att båda vägfilerna kommer att öppnas inom kort. Nu kommer den vackra fastigheten att klara sig torrskodd under många år framöver <img src="data:image/gif;base64,R0lGODlhDwAPALMOAP/qAEVFRQAAAP/OAP/JAP+0AP6dAP/+k//9E///////
+xzMzM///6//lAAAAAAAAACH5BAEAAA4ALAAAAAAPAA8AAARb0EkZap3YVabO
+GRcWcAgCnIMRTEEnCCfwpqt2mHEOagoOnz+CKnADxoKFyiHHBBCSAdOiCVg8
+KwPZa7sVrgJZQWI8FhB2msGgwTXTWGqCXP4WBQr4wjDDstQmEQA7
+" alt=":-)" class="wp-smiley" /> </p>
+<p> </p>
+<hr width="100%"/>
+<table width="100%" cellpadding="0" cellspacing="0">
+<tr><td align="right"><font color="#ababab">Date:</font>  </td><td><font color="#ababab">2016-07-19 11:54:24 +0200</font></td></tr>
+<tr><td align="right"><font color="#ababab">Author:</font>  </td><td><font color="#ababab">malmoborg</font></td></tr>
+<tr><td align="right"><font color="#ababab">Filed under:</font>  </td><td><font color="#ababab">Nyheter</font></td></tr>
+</table>
+
+--=-1468922508-176605-12427-9500-21-=--
-- 
2.11.0