X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=test%2Ftest-lib.sh;h=7448b454a023231947688a542d701438728b8497;hp=418eaa7f6404097f0ba31a0a3a4fe8f9a66d7f6d;hb=61a9448b58ca1320d97cfe580155cf23b5b9ad62;hpb=736ac42c45f62103e99ef18ef06b201d0bcd546f

diff --git a/test/test-lib.sh b/test/test-lib.sh
index 418eaa7f..7448b454 100644
--- a/test/test-lib.sh
+++ b/test/test-lib.sh
@@ -1,4 +1,3 @@
-#!/bin/bash
 #
 # Copyright (c) 2005 Junio C Hamano
 #
@@ -39,7 +38,7 @@ done,*)
 	;;
 esac
 
-# Keep the original TERM for say_color
+# Keep the original TERM for say_color and test_emacs
 ORIGINAL_TERM=$TERM
 
 # For repeatability, reset the environment to known value.
@@ -50,6 +49,7 @@ TZ=UTC
 TERM=dumb
 export LANG LC_ALL PAGER TERM TZ
 GIT_TEST_CMP=${GIT_TEST_CMP:-diff -u}
+TEST_EMACS=${TEST_EMACS:-${EMACS:-emacs}}
 
 # Protect ourselves from common misconfiguration to export
 # CDPATH into the environment
@@ -116,6 +116,16 @@ do
 	esac
 done
 
+if test -n "$debug"; then
+    print_subtest () {
+	printf " %-4s" "[$((test_count - 1))]"
+    }
+else
+    print_subtest () {
+	true
+    }
+fi
+
 if test -n "$color"; then
 	say_color () {
 		(
@@ -130,8 +140,9 @@ if test -n "$color"; then
 		esac
 		shift
 		printf " "
-                printf "$@"
+		printf "$@"
 		tput sgr0
+		print_subtest
 		)
 	}
 else
@@ -139,12 +150,13 @@ else
 		test -z "$1" && test -n "$quiet" && return
 		shift
 		printf " "
-                printf "$@"
+		printf "$@"
+		print_subtest
 	}
 fi
 
 error () {
-	say_color error "error: $*"
+	say_color error "error: $*\n"
 	GIT_EXIT_OK=t
 	exit 1
 }
@@ -165,12 +177,6 @@ fi
 echo $(basename "$0"): "Testing ${test_description}"
 
 exec 5>&1
-if test "$verbose" = "t"
-then
-	exec 4>&2 3>&1
-else
-	exec 4>/dev/null 3>/dev/null
-fi
 
 test_failure=0
 test_count=0
@@ -180,6 +186,7 @@ test_success=0
 
 die () {
 	code=$?
+	rm -rf "$TEST_TMPDIR"
 	if test -n "$GIT_EXIT_OK"
 	then
 		exit $code
@@ -190,6 +197,8 @@ die () {
 }
 
 GIT_EXIT_OK=
+# Note: TEST_TMPDIR *NOT* exported!
+TEST_TMPDIR=$(mktemp -d "${TMPDIR:-/tmp}/notmuch-test-$$.XXXXXX")
 trap 'die' EXIT
 
 test_decode_color () {
@@ -219,16 +228,6 @@ remove_cr () {
 	tr '\015' Q | sed -e 's/Q$//'
 }
 
-# Notmuch helper functions
-increment_mtime_amount=0
-increment_mtime ()
-{
-    dir="$1"
-
-    increment_mtime_amount=$((increment_mtime_amount + 1))
-    touch -d "+${increment_mtime_amount} seconds" "$dir"
-}
-
 # Generate a new message in the mail directory, with a unique message
 # ID and subject. The message is not added to the index.
 #
@@ -250,7 +249,7 @@ increment_mtime ()
 #	Store the message in file 'name'. The default is to store it
 #	in 'msg-<count>', where <count> is three-digit number of the
 #	message.
-#	
+#
 #  [body]=text
 #
 #	Text to use as the body of the email message
@@ -319,11 +318,15 @@ generate_message ()
     fi
 
     if [ -z "${template[subject]}" ]; then
-	template[subject]="Test message #${gen_msg_cnt}"
+	if [ -n "$test_subtest_name" ]; then
+	    template[subject]="$test_subtest_name"
+	else
+	    template[subject]="Test message #${gen_msg_cnt}"
+	fi
     fi
 
     if [ -z "${template[date]}" ]; then
-	template[date]="Tue, 05 Jan 2001 15:43:57 -0000"
+	template[date]="Fri, 05 Jan 2001 15:43:57 +0000"
     fi
 
     additional_headers=""
@@ -357,8 +360,16 @@ ${additional_headers}"
 ${additional_headers}"
     fi
 
+    if [ ! -z "${template[content-transfer-encoding]}" ]; then
+	additional_headers="Content-Transfer-Encoding: ${template[content-transfer-encoding]}
+${additional_headers}"
+    fi
+
+    # Note that in the way we're setting it above and using it below,
+    # `additional_headers' will also serve as the header / body separator
+    # (empty line in between).
 
-cat <<EOF >"$gen_msg_filename"
+    cat <<EOF >"$gen_msg_filename"
 From: ${template[from]}
 To: ${template[to]}
 Message-Id: <${gen_msg_id}>
@@ -367,9 +378,6 @@ Date: ${template[date]}
 ${additional_headers}
 ${template[body]}
 EOF
-
-    # Ensure that the mtime of the containing directory is updated
-    increment_mtime "$(dirname "${gen_msg_filename}")"
 }
 
 # Generate a new message and add it to the database.
@@ -382,6 +390,41 @@ add_message ()
     notmuch new > /dev/null
 }
 
+# Deliver a message with emacs and add it to the database
+#
+# Uses emacs to generate and deliver a message to the mail store.
+# Accepts arbitrary extra emacs/elisp functions to modify the message
+# before sending, which is useful to doing things like attaching files
+# to the message and encrypting/signing.
+emacs_deliver_message ()
+{
+    local subject="$1"
+    local body="$2"
+    shift 2
+    # before we can send a message, we have to prepare the FCC maildir
+    mkdir -p "$MAIL_DIR"/sent/{cur,new,tmp}
+    $TEST_DIRECTORY/smtp-dummy sent_message &
+    smtp_dummy_pid=$!
+    test_emacs \
+	"(let ((message-send-mail-function 'message-smtpmail-send-it)
+	       (smtpmail-smtp-server \"localhost\")
+	       (smtpmail-smtp-service \"25025\"))
+	   (notmuch-hello)
+	   (notmuch-mua-mail)
+	   (message-goto-to)
+	   (insert \"test_suite@notmuchmail.org\nDate: 01 Jan 2000 12:00:00 -0000\")
+	   (message-goto-subject)
+	   (insert \"${subject}\")
+	   (message-goto-body)
+	   (insert \"${body}\")
+	   $@
+	   (message-send-and-exit))"
+    # opportunistically quit smtp-dummy in case above fails.
+    { echo QUIT > /dev/tcp/localhost/25025; } 2>/dev/null
+    wait ${smtp_dummy_pid}
+    notmuch new >/dev/null
+}
+
 # Generate a corpus of email and add it to the database.
 #
 # This corpus is fixed, (it happens to be 50 messages from early in
@@ -391,18 +434,29 @@ add_message ()
 add_email_corpus ()
 {
     rm -rf ${MAIL_DIR}
-    if [ -d ../corpus.mail ]; then
-	cp -a ../corpus.mail ${MAIL_DIR}
+    if [ -d $TEST_DIRECTORY/corpus.mail ]; then
+	cp -a $TEST_DIRECTORY/corpus.mail ${MAIL_DIR}
     else
-	cp -a ../corpus ${MAIL_DIR}
+	cp -a $TEST_DIRECTORY/corpus ${MAIL_DIR}
 	notmuch new >/dev/null
-	cp -a ${MAIL_DIR} ../corpus.mail
+	cp -a ${MAIL_DIR} $TEST_DIRECTORY/corpus.mail
     fi
 }
 
 test_begin_subtest ()
 {
+    if [ -n "$inside_subtest" ]; then
+	exec 1>&6 2>&7		# Restore stdout and stderr
+	error "bug in test script: Missing test_expect_equal in ${BASH_SOURCE[1]}:${BASH_LINENO[0]}"
+    fi
     test_subtest_name="$1"
+    test_reset_state_
+    # Remember stdout and stderr file descriptors and redirect test
+    # output to the previously prepared file descriptors 3 and 4 (see
+    # below)
+    if test "$verbose" != "t"; then exec 4>test.output 3>&4; fi
+    exec 6>&1 7>&2 >&3 2>&4
+    inside_subtest=t
 }
 
 # Pass test if two arguments match
@@ -413,13 +467,15 @@ test_begin_subtest ()
 # name.
 test_expect_equal ()
 {
+	exec 1>&6 2>&7		# Restore stdout and stderr
+	inside_subtest=
 	test "$#" = 3 && { prereq=$1; shift; } || prereq=
 	test "$#" = 2 ||
 	error "bug in the test script: not 2 or 3 parameters to test_expect_equal"
 
 	output="$1"
 	expected="$2"
-	if ! test_skip "$@"
+	if ! test_skip "$test_subtest_name"
 	then
 		if [ "$output" = "$expected" ]; then
 			test_ok_ "$test_subtest_name"
@@ -432,24 +488,69 @@ test_expect_equal ()
     fi
 }
 
-test_expect_equal_failure ()
+# Like test_expect_equal, but takes two filenames.
+test_expect_equal_file ()
 {
+	exec 1>&6 2>&7		# Restore stdout and stderr
+	inside_subtest=
 	test "$#" = 3 && { prereq=$1; shift; } || prereq=
 	test "$#" = 2 ||
 	error "bug in the test script: not 2 or 3 parameters to test_expect_equal"
 
-	output="$1"
-	expected="$2"
-	if ! test_skip "$@"
+	file1="$1"
+	file2="$2"
+	if ! test_skip "$test_subtest_name"
 	then
-		if [ "$output" = "$expected" ]; then
-			test_known_broken_ok_ "$test_subtest_name"
+		if diff -q "$file1" "$file2" >/dev/null ; then
+			test_ok_ "$test_subtest_name"
 		else
-			test_known_broken_failure_ "$test_subtest_name"
+			testname=$this_test.$test_count
+			cp "$file1" "$testname.$file1"
+			cp "$file2" "$testname.$file2"
+			test_failure_ "$test_subtest_name" "$(diff -u "$testname.$file1" "$testname.$file2")"
 		fi
     fi
 }
 
+# Like test_expect_equal, but arguments are JSON expressions to be
+# canonicalized before diff'ing.  If an argument cannot be parsed, it
+# is used unchanged so that there's something to diff against.
+test_expect_equal_json () {
+    output=$(echo "$1" | python -mjson.tool || echo "$1")
+    expected=$(echo "$2" | python -mjson.tool || echo "$2")
+    shift 2
+    test_expect_equal "$output" "$expected" "$@"
+}
+
+test_emacs_expect_t () {
+	test "$#" = 2 && { prereq=$1; shift; } || prereq=
+	test "$#" = 1 ||
+	error "bug in the test script: not 1 or 2 parameters to test_emacs_expect_t"
+
+	# Run the test.
+	if ! test_skip "$test_subtest_name"
+	then
+		test_emacs "(notmuch-test-run $1)" >/dev/null
+
+		# Restore state after the test.
+		exec 1>&6 2>&7		# Restore stdout and stderr
+		inside_subtest=
+
+		# Report success/failure.
+		result=$(cat OUTPUT)
+		if [ "$result" = t ]
+		then
+			test_ok_ "$test_subtest_name"
+		else
+			test_failure_ "$test_subtest_name" "${result}"
+		fi
+	else
+		# Restore state after the (non) test.
+		exec 1>&6 2>&7		# Restore stdout and stderr
+		inside_subtest=
+	fi
+}
+
 NOTMUCH_NEW ()
 {
     notmuch new | grep -v -E -e '^Processed [0-9]*( total)? file|Found [0-9]* total file'
@@ -465,6 +566,19 @@ notmuch_show_sanitize ()
 {
     sed -e "$NOTMUCH_SHOW_FILENAME_SQUELCH"
 }
+notmuch_show_sanitize_all ()
+{
+    sed \
+	-e 's| filename:.*| filename:XXXXX|' \
+	-e 's| id:[^ ]* | id:XXXXX |'
+}
+
+notmuch_json_show_sanitize ()
+{
+    sed \
+	-e 's|"id": "[^"]*",|"id": "XXXXX",|g' \
+	-e 's|"filename": "[^"]*",|"filename": "YYYYY",|g'
+}
 
 # End of notmuch helper functions
 
@@ -493,34 +607,77 @@ test_have_prereq () {
 	esac
 }
 
+# declare prerequisite for the given external binary
+test_declare_external_prereq () {
+	binary="$1"
+	test "$#" = 2 && name=$2 || name="$binary(1)"
+
+	hash $binary 2>/dev/null || eval "
+	test_missing_external_prereq_${binary}_=t
+$binary () {
+	echo -n \"\$test_subtest_missing_external_prereqs_ \" | grep -qe \" $name \" ||
+	test_subtest_missing_external_prereqs_=\"\$test_subtest_missing_external_prereqs_ $name\"
+	false
+}"
+}
+
+# Explicitly require external prerequisite.  Useful when binary is
+# called indirectly (e.g. from emacs).
+# Returns success if dependency is available, failure otherwise.
+test_require_external_prereq () {
+	binary="$1"
+	if [ "$(eval echo -n \$test_missing_external_prereq_${binary}_)" = t ]; then
+		# dependency is missing, call the replacement function to note it
+		eval "$binary"
+	else
+		true
+	fi
+}
+
 # You are not expected to call test_ok_ and test_failure_ directly, use
 # the text_expect_* functions instead.
 
 test_ok_ () {
+	if test "$test_subtest_known_broken_" = "t"; then
+		test_known_broken_ok_ "$@"
+		return
+	fi
 	test_success=$(($test_success + 1))
 	say_color pass "%-6s" "PASS"
 	echo " $@"
 }
 
 test_failure_ () {
+	if test "$test_subtest_known_broken_" = "t"; then
+		test_known_broken_failure_ "$@"
+		return
+	fi
 	test_failure=$(($test_failure + 1))
-	say_color error "%-6s" "FAIL"
-	echo " $1"
-	shift
-	echo "$@" | sed -e 's/^/	/'
+	test_failure_message_ "FAIL" "$@"
 	test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
+	return 1
+}
+
+test_failure_message_ () {
+	say_color error "%-6s" "$1"
+	echo " $2"
+	shift 2
+	echo "$@" | sed -e 's/^/	/'
+	if test "$verbose" != "t"; then cat test.output; fi
 }
 
 test_known_broken_ok_ () {
+	test_reset_state_
 	test_fixed=$(($test_fixed+1))
 	say_color pass "%-6s" "FIXED"
 	echo " $@"
 }
 
 test_known_broken_failure_ () {
+	test_reset_state_
 	test_broken=$(($test_broken+1))
-	say_color pass "%-6s" "BROKEN"
-	echo " $@"
+	test_failure_message_ "BROKEN" "$@"
+	return 1
 }
 
 test_debug () {
@@ -529,6 +686,7 @@ test_debug () {
 
 test_run_ () {
 	test_cleanup=:
+	if test "$verbose" != "t"; then exec 4>test.output 3>&4; fi
 	eval >&3 2>&4 "$1"
 	eval_ret=$?
 	eval >&3 2>&4 "$test_cleanup"
@@ -552,41 +710,48 @@ test_skip () {
 	fi
 	case "$to_skip" in
 	t)
-		say_color skip >&3 "skipping test: $@"
-		say_color skip "%-6s" "SKIP"
-		echo " $1"
-		: true
+		test_report_skip_ "$@"
 		;;
 	*)
-		false
+		test_check_missing_external_prereqs_ "$@"
 		;;
 	esac
 }
 
-test_expect_failure () {
-	test "$#" = 3 && { prereq=$1; shift; } || prereq=
-	test "$#" = 2 ||
-	error "bug in the test script: not 2 or 3 parameters to test-expect-failure"
-	if ! test_skip "$@"
-	then
-		test_run_ "$2"
-		if [ "$?" = 0 -a "$eval_ret" = 0 ]
-		then
-			test_known_broken_ok_ "$1"
-		else
-			test_known_broken_failure_ "$1"
-		fi
+test_check_missing_external_prereqs_ () {
+	if test -n "$test_subtest_missing_external_prereqs_"; then
+		say_color skip >&1 "missing prerequisites:"
+		echo "$test_subtest_missing_external_prereqs_" >&1
+		test_report_skip_ "$@"
+	else
+		false
 	fi
 }
 
+test_report_skip_ () {
+	test_reset_state_
+	say_color skip >&3 "skipping test:"
+	echo " $@" >&3
+	say_color skip "%-6s" "SKIP"
+	echo " $1"
+}
+
+test_subtest_known_broken () {
+	test_subtest_known_broken_=t
+}
+
 test_expect_success () {
 	test "$#" = 3 && { prereq=$1; shift; } || prereq=
 	test "$#" = 2 ||
 	error "bug in the test script: not 2 or 3 parameters to test-expect-success"
+	test_reset_state_
 	if ! test_skip "$@"
 	then
 		test_run_ "$2"
-		if [ "$?" = 0 -a "$eval_ret" = 0 ]
+		run_ret="$?"
+		# test_run_ may update missing external prerequisites
+		test_check_missing_external_prereqs_ "$@" ||
+		if [ "$run_ret" = 0 -a "$eval_ret" = 0 ]
 		then
 			test_ok_ "$1"
 		else
@@ -599,10 +764,14 @@ test_expect_code () {
 	test "$#" = 4 && { prereq=$1; shift; } || prereq=
 	test "$#" = 3 ||
 	error "bug in the test script: not 3 or 4 parameters to test-expect-code"
+	test_reset_state_
 	if ! test_skip "$@"
 	then
 		test_run_ "$3"
-		if [ "$?" = 0 -a "$eval_ret" = "$1" ]
+		run_ret="$?"
+		# test_run_ may update missing external prerequisites,
+		test_check_missing_external_prereqs_ "$@" ||
+		if [ "$run_ret" = 0 -a "$eval_ret" = "$1" ]
 		then
 			test_ok_ "$2"
 		else
@@ -625,6 +794,7 @@ test_external () {
 	error >&5 "bug in the test script: not 3 or 4 parameters to test_external"
 	descr="$1"
 	shift
+	test_reset_state_
 	if ! test_skip "$descr" "$@"
 	then
 		# Announce the script to reduce confusion about the
@@ -669,7 +839,7 @@ test_external_without_stderr () {
 	fi
 }
 
-# This is not among top-level (test_expect_success | test_expect_failure)
+# This is not among top-level (test_expect_success)
 # but is a prefix that can be used in the test script, like:
 #
 #	test_expect_success 'complain and die' '
@@ -743,57 +913,148 @@ test_done () {
 
 	echo
 
+	[ -n "$EMACS_SERVER" ] && test_emacs '(kill-emacs)'
+
 	if [ "$test_failure" = "0" ]; then
-	    rm -rf "$remove_tmp"
+	    if [ "$test_broken" = "0" ]; then
+		rm -rf "$remove_tmp"
+	    fi
 	    exit 0
 	else
 	    exit 1
 	fi
 }
 
-test_emacs () {
+emacs_generate_script () {
 	# Construct a little test script here for the benefit of the user,
 	# (who can easily run "run_emacs" to get the same emacs environment
-	# for investigating any failures).    
-	cat <<EOF > run_emacs
+	# for investigating any failures).
+	cat <<EOF >"$TMP_DIRECTORY/run_emacs"
 #!/bin/sh
 export PATH=$PATH
 export NOTMUCH_CONFIG=$NOTMUCH_CONFIG
 
-# We assume that the user will give a command-line argument only if
-# wanting to run in batch mode.
-if [ \$# -gt 0 ]; then
-	BATCH=--batch
-fi
-
 # Here's what we are using here:
 #
-# --batch:		Quit after given commands and print all (messages)
-#
 # --no-init-file	Don't load users ~/.emacs
 #
 # --no-site-file	Don't load the site-wide startup stuff
 #
-# --directory		Ensure that the local notmuch.el source is found
+# --directory		Ensure that the local elisp sources are found
 #
-# --load		Force loading of notmuch.el
-#
-# notmuch-test-wait	Function for tests to use to wait for process completion
-#
-# message-signature	Avoiding appending user's signature on messages
-#
-# set-frame-width	80 columns (avoids crazy 10-column default of --batch)
+# --load		Force loading of notmuch.el and test-lib.el
+
+exec ${TEST_EMACS} --no-init-file --no-site-file \
+	--directory "$TEST_DIRECTORY/../emacs" --load notmuch.el \
+	--directory "$TEST_DIRECTORY" --load test-lib.el \
+	"\$@"
+EOF
+	chmod a+x "$TMP_DIRECTORY/run_emacs"
+}
+
+test_emacs () {
+	# test dependencies beforehand to avoid the waiting loop below
+	missing_dependencies=
+	test_require_external_prereq dtach || missing_dependencies=1
+	test_require_external_prereq emacs || missing_dependencies=1
+	test_require_external_prereq emacsclient || missing_dependencies=1
+	test -z "$missing_dependencies" || return
+
+	if [ -z "$EMACS_SERVER" ]; then
+		emacs_tests="$(basename $0).el"
+		if [ -f "$TEST_DIRECTORY/$emacs_tests" ]; then
+			load_emacs_tests="--eval '(load \"$emacs_tests\")'"
+		else
+			load_emacs_tests=
+		fi
+		server_name="notmuch-test-suite-$$"
+		# start a detached session with an emacs server
+		# user's TERM is given to dtach which assumes a minimally
+		# VT100-compatible terminal -- and emacs inherits that
+		TERM=$ORIGINAL_TERM dtach -n "$TEST_TMPDIR/emacs-dtach-socket.$$" \
+			sh -c "stty rows 24 cols 80; exec '$TMP_DIRECTORY/run_emacs' \
+				--no-window-system \
+				$load_emacs_tests \
+				--eval '(setq server-name \"$server_name\")' \
+				--eval '(server-start)' \
+				--eval '(orphan-watchdog $$)'" || return
+		EMACS_SERVER="$server_name"
+		# wait until the emacs server is up
+		until test_emacs '()' >/dev/null 2>/dev/null; do
+			sleep 1
+		done
+	fi
 
-emacs \$BATCH --no-init-file --no-site-file \
-	--directory ../../emacs --load notmuch.el \
-	--eval "(defun notmuch-test-wait ()
-			(while (get-buffer-process (current-buffer))
-				(sleep-for 0.1)))" \
-	--eval "(setq message-signature nil)" \
-	--eval "(progn (set-frame-width (window-frame (get-buffer-window)) 80) \$@)"
+	# Clear test-output output file.  Most Emacs tests end with a
+	# call to (test-output).  If the test code fails with an
+	# exception before this call, the output file won't get
+	# updated.  Since we don't want to compare against an output
+	# file from another test, so start out with an empty file.
+	rm -f OUTPUT
+	touch OUTPUT
+
+	emacsclient --socket-name="$EMACS_SERVER" --eval "(progn $@)"
+}
+
+test_python() {
+	export LD_LIBRARY_PATH=$TEST_DIRECTORY/../lib
+	export PYTHONPATH=$TEST_DIRECTORY/../bindings/python
+
+	# Some distros (e.g. Arch Linux) ship Python 2.* as /usr/bin/python2,
+	# most others as /usr/bin/python. So first try python2, and fallback to
+	# python if python2 doesn't exist.
+	cmd=python2
+	[[ "$test_missing_external_prereq_python2_" = t ]] && cmd=python
+
+	(echo "import sys; _orig_stdout=sys.stdout; sys.stdout=open('OUTPUT', 'w')"; cat) \
+		| $cmd -
+}
+
+# Creates a script that counts how much time it is executed and calls
+# notmuch.  $notmuch_counter_command is set to the path to the
+# generated script.  Use notmuch_counter_value() function to get the
+# current counter value.
+notmuch_counter_reset () {
+	notmuch_counter_command="$TMP_DIRECTORY/notmuch_counter"
+	if [ ! -x "$notmuch_counter_command" ]; then
+		notmuch_counter_state_path="$TMP_DIRECTORY/notmuch_counter.state"
+		cat >"$notmuch_counter_command" <<EOF || return
+#!/bin/sh
+
+read count < "$notmuch_counter_state_path"
+echo \$((count + 1)) > "$notmuch_counter_state_path"
+
+exec notmuch "\$@"
 EOF
-	chmod a+x ./run_emacs
-	./run_emacs "$@"
+		chmod +x "$notmuch_counter_command" || return
+	fi
+
+	echo 0 > "$notmuch_counter_state_path"
+}
+
+# Returns the current notmuch counter value.
+notmuch_counter_value () {
+	if [ -r "$notmuch_counter_state_path" ]; then
+		read count < "$notmuch_counter_state_path"
+	else
+		count=0
+	fi
+	echo $count
+}
+
+test_reset_state_ () {
+	test -z "$test_init_done_" && test_init_
+
+	test_subtest_known_broken_=
+	test_subtest_missing_external_prereqs_=
+}
+
+# called once before the first subtest
+test_init_ () {
+	test_init_done_=t
+
+	# skip all tests if there were external prerequisites missing during init
+	test_check_missing_external_prereqs_ "all tests in $this_test" && test_done
 }
 
 
@@ -817,6 +1078,7 @@ find_notmuch_path ()
 # Test the binaries we have just built.  The tests are kept in
 # test/ subdirectory and are run in 'trash directory' subdirectory.
 TEST_DIRECTORY=$(pwd)
+notmuch_path=`find_notmuch_path "$TEST_DIRECTORY"`
 if test -n "$valgrind"
 then
 	make_symlink () {
@@ -849,11 +1111,11 @@ then
 		    test ! -d "$symlink_target" &&
 		    test "#!" != "$(head -c 2 < "$symlink_target")"
 		then
-			symlink_target=../valgrind.sh
+			symlink_target=$TEST_DIRECTORY/valgrind.sh
 		fi
 		case "$base" in
 		*.sh|*.perl)
-			symlink_target=../unprocessed-script
+			symlink_target=$TEST_DIRECTORY/unprocessed-script
 		esac
 		# create the link, or replace it if it is out of date
 		make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
@@ -877,11 +1139,15 @@ then
 	PATH=$GIT_VALGRIND/bin:$PATH
 	GIT_EXEC_PATH=$GIT_VALGRIND/bin
 	export GIT_VALGRIND
+	test -n "$notmuch_path" && MANPATH="$notmuch_path/man:$MANPATH"
 else # normal case
-	notmuch_path=`find_notmuch_path "$TEST_DIRECTORY"`
-	test -n "$notmuch_path" && PATH="$notmuch_path:$PATH"
+	if test -n "$notmuch_path"
+		then
+			PATH="$notmuch_path:$PATH"
+			MANPATH="$notmuch_path/man:$MANPATH"
+		fi
 fi
-export PATH
+export PATH MANPATH
 
 # Test repository
 test="tmp.$(basename "$0" .sh)"
@@ -897,7 +1163,15 @@ rm -fr "$test" || {
 	exit 1
 }
 
+# A temporary home directory is needed by at least:
+# - emacs/"Sending a message via (fake) SMTP"
+# - emacs/"Reply within emacs"
+# - crypto/emacs_deliver_message
+export HOME="${TMP_DIRECTORY}/home"
+mkdir -p "${HOME}"
+
 MAIL_DIR="${TMP_DIRECTORY}/mail"
+export GNUPGHOME="${TMP_DIRECTORY}/gnupg"
 export NOTMUCH_CONFIG="${TMP_DIRECTORY}/notmuch-config"
 
 mkdir -p "${test}"
@@ -913,11 +1187,20 @@ primary_email=test_suite@notmuchmail.org
 other_email=test_suite_other@notmuchmail.org;test_suite@otherdomain.org
 EOF
 
+emacs_generate_script
+
 
 # Use -P to resolve symlinks in our working directory so that the cwd
 # in subprocesses like git equals our $PWD (for pathname comparisons).
 cd -P "$test" || error "Cannot setup test environment"
 
+if test "$verbose" = "t"
+then
+	exec 4>&2 3>&1
+else
+	exec 4>test.output 3>&4
+fi
+
 this_test=${0##*/}
 for skp in $NOTMUCH_SKIP_TESTS
 do
@@ -986,3 +1269,12 @@ test -z "$NO_PYTHON" && test_set_prereq PYTHON
 # test whether the filesystem supports symbolic links
 ln -s x y 2>/dev/null && test -h y 2>/dev/null && test_set_prereq SYMLINKS
 rm -f y
+
+# declare prerequisites for external binaries used in tests
+test_declare_external_prereq dtach
+test_declare_external_prereq emacs
+test_declare_external_prereq emacsclient
+test_declare_external_prereq gdb
+test_declare_external_prereq gpg
+test_declare_external_prereq python
+test_declare_external_prereq python2