rewrite the integration tests into C

Makefile.in

@@ -24,7 +24,7 @@ OBJECTS = iast.o iast-czech.o transliteration.o transcription.o utf8.o	\
 	velthuis.o
 
 TEST_OBJECTS = tests/main.o tests/translit.o tests/transcript.o 	\
-	tests/velthuis.o tests/utf8.o
+	tests/velthuis.o tests/utf8.o tests/integration.o
 
 AUX_FILES = Makefile configure aclocal.m4 install-sh config.h* *.log	\
 	*.status *.cache
@@ -36,7 +36,7 @@ include $(wildcard *.d tests/*.d)
 $(PROGNAME): main.o $(OBJECTS)
 	$(QUIET_LD) $(CC) $^ -o $@ $(LFLAGS)
 
-test: tests/test
+test: all
 	tests/test
 
 %.o: %.c

tests/integration.c

@@ -0,0 +1,97 @@
+#include "test.h"
+#include "integration.h"
+#include "../transliteration.h"
+
+static char *exec_command(const char *command)
+{
+	char buf[512], *ret = NULL;
+	FILE *proc;
+	int n, len = 0;
+
+	proc = popen(command, "r");
+
+	while (1) {
+		n = fread(buf, 1, sizeof(buf), proc);
+		if (n == 0 || n == -1)
+			break;
+		ret = realloc(ret, len + n + 1);
+		memcpy(ret + len, buf, n);
+		len += n;
+	}
+
+	if (ret)
+		ret[len] = '\0';
+
+	pclose(proc);
+
+	return ret;
+}
+
+static char *read_file(const char *filename)
+{
+	unsigned char buf[512];
+	char *ret = NULL;
+	int fd, len = 0, n;
+
+	fd = open(filename, O_RDONLY);
+	while (1) {
+		n = read(fd, buf, sizeof(buf));
+		if (n == 0 || n == -1)
+			break;
+		ret = realloc(ret, len + n + 1);
+		memcpy(ret + len, buf, n);
+		len += n;
+	}
+
+	if (ret)
+		ret[len] = '\0';
+
+	close(fd);
+
+	return ret;
+}
+
+static void test_file_transliteration(const char *filename)
+{
+	char cmd[512], *a, *b;
+
+	sprintf(cmd, "./iast -f %s | ./iast -r -f -", filename);
+	a = exec_command(cmd);
+	b = read_file(filename);
+	ck_assert_str_eq(a, b);
+	free(a);
+	free(b);
+}
+
+START_TEST(test_integration)
+{
+	test_file_transliteration("tests/texts/bhagavadgita-1.txt");
+	test_file_transliteration("tests/texts/mandukya-upanishad.txt");
+	test_file_transliteration("tests/texts/rg-01001.txt");
+}
+END_TEST
+
+START_TEST(test_version)
+{
+	char *out = exec_command("./iast -v");
+	ck_assert_str_eq("iast v2.0.0\n", out);
+	free(out);
+}
+END_TEST
+
+START_TEST(test_usage)
+{
+	char *out;
+	out = exec_command("./iast");
+	out[44] = '\0'; /* the first line is enough here */
+	ck_assert_str_eq("iast, a helper for Sanskrit transliteration.", out);
+	free(out);
+}
+END_TEST
+
+void register_integration_tests(TCase *test_case)
+{
+	tcase_add_test(test_case, test_integration);
+	tcase_add_test(test_case, test_version);
+	tcase_add_test(test_case, test_usage);
+}

tests/integration.h

@@ -0,0 +1,8 @@
+#ifndef __TEST_INTEGRATION_H
+#define __TEST_INTEGRATION_H
+
+#include <check.h>
+
+void register_integration_tests(TCase *test_case);
+
+#endif /* __TEST_INTEGRATION_H */

tests/integration.sh

@@ -1,29 +0,0 @@
-#!/bin/sh
-set -e
-
-usage=$(./iast -h)
-test -n $(echo "$usage" | grep "iast [flags and text arguments in any order]")
-
-version=$(./iast -v)
-test "$version" = "iast v2.0.0"
-
-./iast -f tests/texts/bhagavadgita-1.txt |
-	./iast -r -f - >/tmp/iast-bhagavadgita-1.txt.out
-./iast -f tests/texts/mandukya-upanishad.txt |
-	./iast -r -f - >/tmp/iast-mandukya-upanishad.txt.out
-./iast -f tests/texts/rg-01001.txt |
-	./iast -r -f - >/tmp/rg-01001.txt.out
-
-expected=$(sha1sum tests/texts/bhagavadgita-1.txt | head -c40)
-computed=$(sha1sum /tmp/iast-bhagavadgita-1.txt.out | head -c40)
-test "$expected" = "$computed"
-
-expected=$(sha1sum tests/texts/mandukya-upanishad.txt | head -c40)
-computed=$(sha1sum /tmp/iast-mandukya-upanishad.txt.out | head -c40)
-test "$expected" = "$computed"
-
-expected=$(sha1sum tests/texts/rg-01001.txt | head -c40)
-computed=$(sha1sum /tmp/rg-01001.txt.out | head -c40)
-test "$expected" = "$computed"
-
-printf "\033[32mpassed\033[0m\n"

tests/main.c

@@ -3,6 +3,7 @@
 #include "transcript.h"
 #include "velthuis.h"
 #include "utf8.h"
+#include "integration.h"
 
 static Suite *create_test_suite()
 {
@@ -17,6 +18,8 @@ static Suite *create_test_suite()
 	register_velthuis_encoder_tests(test_case);
 	register_utf8_tests(test_case);
 
+	register_integration_tests(test_case);
+
 	suite_add_tcase(suite, test_case);
 
 	return suite;

tests/test.h

@@ -3,6 +3,8 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
 #include <check.h>
 
 #endif /* __TEST_TEST_H */

velthuis.c

@@ -1,10 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* https://en.wikipedia.org/wiki/Velthuis */
 
-#include <stdio.h>
+#include "compat.h"
-#include <stdlib.h>
-#include <string.h>
-
 #include "velthuis.h"
 #include "utf8.h"
 
@@ -61,9 +58,9 @@ int encode_velthuis_to_iast_punctation(const char *text, char **out)
 	const struct encoder_tuple *tuple;
 	char *buf, *dest;
 
-	buf = calloc(1, strlen(text) << 1);
+	buf = calloc(1, strlen(text) * 2); /* should be enough */
 	if (buf == NULL)
-		return NULL;
+		return ENOMEM;
 
 	dest = buf;
 	while (str < end) {