test1901: verify chunked POST from callback with CURLOPT_POSTFIELDSIZE set

Follow-up to 721941aadf

Ref: #13257
Closes #13262

tests/data/Makefile.inc

@@ -221,7 +221,7 @@ test1700 test1701 test1702 test1703 test1704 \
 \
 test1800 test1801 \
 \
-test1900                   test1903 test1904 test1905 test1906 test1907 \
+test1900 test1901          test1903 test1904 test1905 test1906 test1907 \
 test1908 test1909 test1910 test1911 test1912 test1913 test1914 test1915 \
 test1916 test1917 test1918 test1919 \
 \

tests/data/test1901

@@ -0,0 +1,60 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP POST
+CURLOPT_READFUNCTION
+</keywords>
+</info>
+
+# Server-side
+<reply>
+<data crlf="yes" nocheck="yes">
+HTTP/1.1 200 OK
+Content-Length: 6
+Content-Type: text/html
+
+-foo-
+</data>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+
+<name>
+Chunked HTTP POST from callback with CURLOPT_POSTFIELDSIZE set
+</name>
+<tool>
+lib%TESTNUMBER
+</tool>
+
+<command>
+http://%HOSTIP:%HTTPPORT/boom
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+<protocol crlf="yes">
+POST /boom HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+Transfer-Encoding: chunked
+Content-Type: application/x-www-form-urlencoded
+
+3
+one
+3
+two
+5
+three
+4
+four
+0
+
+</protocol>
+</verify>
+</testcase>