Set up testing infrastructure.

* tests/xapian.scm: New file.
* build-aux/test-driver.scm.in: New file.
* configure.ac: Configure build-aux/test-driver.scm.
* .gitignore: Add build-aux/test-driver.scm, tests/*.log and
tests/*.trs.
* Makefile.am (EXTRA_DIST): Add TESTS.
(TEST_EXTENSIONS, SCM_TESTS, TESTS, SCM_LOG_DRIVER): New variables.

5 files changed, 147 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index 0432bfc..7c9bd76 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,8 +21,13 @@ xapian/*.go
 xapian/wrap.scm
 xapian_wrap.cc
 
+# tests
+tests/*.log
+tests/*.trs
+
 # website
 website/index.html
 
 # other
+build-aux/test-driver.scm
 pre-inst-env
\ No newline at end of file
diff --git a/Makefile.am b/Makefile.am
index b5f954f..6417ce9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -54,7 +54,7 @@ nobase_mod_DATA = $(SOURCES)
 nobase_go_DATA = $(GOBJECTS)
 
 CLEANFILES = $(GOBJECTS)
-EXTRA_DIST = $(SOURCES)
+
 GUILE_WARNINGS = -Wunbound-variable -Warity-mismatch -Wformat
 SUFFIXES = .scm .go
 .scm.go:
@@ -64,6 +64,21 @@ SUFFIXES = .scm .go
 # shared library.
 xapian/xapian.go: xapian/xapian.scm libguilexapian.la
 
+# Tests
+
+TEST_EXTENSIONS = .scm
+SCM_TESTS = tests/xapian.scm
+TESTS = $(SCM_TESTS)
+
+SCM_LOG_DRIVER =		\
+  $(builddir)/pre-inst-env	\
+  $(GUILE) --no-auto-compile -s \
+  $(builddir)/build-aux/test-driver.scm
+
+# Distribution
+
+EXTRA_DIST = $(TESTS) $(SOURCES)
+
 # Build website
 
 website: website/index.html
diff --git a/build-aux/test-driver.scm.in b/build-aux/test-driver.scm.in
new file mode 100644
index 0000000..262d3a8
--- /dev/null
+++ b/build-aux/test-driver.scm.in
@@ -0,0 +1,100 @@
+;;; guile-xapian --- Guile bindings for Xapian
+;;; Copyright © 2021 Arun Isaac <arunisaac@systemreboot.net>
+;;;
+;;; This file is part of guile-xapian.
+;;;
+;;; guile-xapian is free software: you can redistribute it and/or
+;;; modify it under the terms of the GNU General Public License as
+;;; published by the Free Software Foundation, either version 2 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; guile-xapian is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with guile-xapian.  If not, see
+;;; <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This is a better test driver for Guile's (srfi srfi-64).
+;;
+;; TODO: Improve Guile's test driver so this module won't be
+;; necessary.
+
+;;; Code:
+
+(use-modules (ice-9 format)
+             (ice-9 getopt-long)
+             (ice-9 match)
+             (srfi srfi-26)
+             (srfi srfi-64))
+
+;; Currently, only log-file and trs-file are understood. Everything
+;; else is ignored.
+(define %options
+  '((test-name (value #t))
+    (log-file (value #t))
+    (trs-file (value #t))
+    (color-tests (value #t))
+    (expect-failure (value #t))
+    (enable-hard-errors (value #t))))
+
+(define (color code str color?)
+  (if color?
+      (format #f "~a[~am~a~a[0m" #\esc code str #\esc)
+      str))
+
+(define red (cut color 31 <> <>))
+(define green (cut color 32 <> <>))
+(define magenta (cut color 35 <> <>))
+
+(define (my-gnu-runner log-port trs-port color?)
+  (let ((runner (test-runner-null)))
+    (test-runner-on-group-begin! runner
+      (lambda (runner suite-name count)
+        (format #t (magenta "%%%% ~a~%" color?) suite-name)))
+    (test-runner-on-group-end! runner
+      (lambda _
+        (newline)))
+    (test-runner-on-test-end! runner
+      (lambda (runner)
+        (let ((name (test-runner-test-name runner))
+              (result (string-upcase
+                       (symbol->string (test-result-kind runner))))
+              (result-alist (test-result-alist runner)))
+          (format trs-port ":test-result: ~a ~a~%" result name)
+          (format #t "~a ~a~%"
+                  (case (test-result-kind runner)
+                    ((pass) (green result color?))
+                    (else (red result color?)))
+                  name)
+          (format log-port "~a ~a~%" result name)
+          ;; If test did not pass, print details.
+          (unless (eq? (test-result-kind runner) 'pass)
+            (let* ((expected-value (match (assq-ref result-alist 'source-form)
+                                     (('test-assert _ ...) #t)
+                                     (_ (assq-ref result-alist 'expected-value))))
+                   (log-output
+                    (format #f "~a:~a~%expected: ~s~%actual: ~s~%"
+                            (assq-ref result-alist 'source-file)
+                            (assq-ref result-alist 'source-line)
+                            expected-value
+                            (assq-ref result-alist 'actual-value))))
+              (display log-output log-port)
+              (display log-output (current-error-port)))))))
+    runner))
+
+(let ((opts (getopt-long (command-line) %options)))
+  (call-with-output-file (string-append "@abs_top_builddir@/"
+                                        (option-ref opts 'log-file #f))
+    (lambda (log-port)
+      (call-with-output-file (option-ref opts 'trs-file #f)
+        (lambda (trs-port)
+          (chdir "@abs_top_srcdir@")
+          (test-with-runner (my-gnu-runner log-port trs-port
+                                           (string=? (option-ref opts 'color-tests "yes")
+                                                     "yes"))
+            (load-from-path (option-ref opts 'test-name #f))))))))
diff --git a/configure.ac b/configure.ac
index ad713be..2a261f1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,4 +44,5 @@ AC_SUBST([SWIG_FLAGS], [$(PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 pkg-config --cflags x
 
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_FILES([pre-inst-env], [chmod +x pre-inst-env])
+AC_CONFIG_FILES([build-aux/test-driver.scm])
 AC_OUTPUT
diff --git a/tests/xapian.scm b/tests/xapian.scm
new file mode 100644
index 0000000..fd339e1
--- /dev/null
+++ b/tests/xapian.scm
@@ -0,0 +1,25 @@
+;;; guile-xapian --- Guile bindings for Xapian
+;;; Copyright © 2021 Arun Isaac <arunisaac@systemreboot.net>
+;;;
+;;; This file is part of guile-xapian.
+;;;
+;;; guile-xapian is free software: you can redistribute it and/or
+;;; modify it under the terms of the GNU General Public License as
+;;; published by the Free Software Foundation, either version 2 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; guile-xapian is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with guile-xapian.  If not, see
+;;; <https://www.gnu.org/licenses/>.
+
+(use-modules (srfi srfi-64)
+             (xapian xapian))
+
+(test-begin "xapian")
+
+(test-end "xapian")