Implement databuf test for auparse

Implement comprehensive tests covering basic appends and preserved-head
behavior

Author: stevegrubb

auparse/test/Makefile.am

@@ -21,7 +21,7 @@
 #
 
 CONFIG_CLEAN_FILES = *.loT *.rej *.orig *.cur
-check_PROGRAMS = auparse_test auparselol_test lookup_test
+check_PROGRAMS = auparse_test auparselol_test lookup_test databuf_test
 dist_check_SCRIPTS = auparse_test.py
 EXTRA_DIST = auparse_test.ref auparse_test.ref.py test.log test2.log test3.log test4.log auditd_raw.sed
 
@@ -45,9 +45,15 @@ auparselol_test_LDADD = ${top_builddir}/auparse/libauparse.la \
 	${top_builddir}/lib/libaudit.la ${top_builddir}/common/libaucommon.la
 auparselol_test_DEPENDENCIES = ${top_builddir}/auparse/libauparse.la ${top_builddir}/lib/libaudit.la ${top_builddir}/common/libaucommon.la
 
+databuf_test_SOURCES = databuf_test.c
+databuf_test_LDFLAGS = -static
+databuf_test_LDADD = ${top_builddir}/auparse/libauparse.la \
+	${top_builddir}/lib/libaudit.la ${top_builddir}/common/libaucommon.la
+databuf_test_DEPENDENCIES = ${top_builddir}/auparse/libauparse.la ${top_builddir}/lib/libaudit.la ${top_builddir}/common/libaucommon.la
+
 drop_srcdir = sed 's,$(srcdir)/test,test,'
 
-check-local: auparse_test auparselol_test lookup_test
+check-local: auparse_test auparselol_test lookup_test databuf_test
 	test "$(top_srcdir)" = "$(top_builddir)" || \
 			cp $(top_srcdir)/auparse/test/test*.log .
 	LC_ALL=C \

auparse/test/databuf_test.c

@@ -0,0 +1,70 @@
+#include "config.h"
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include "data_buf.h"
+
+static void test_basic(void)
+{
+	DataBuf db;
+	char data1[] = "abcd";
+	char data2[] = "ef";
+	char data3[] = "ghij";
+
+	assert(databuf_init(&db, 0, 0) == 1);
+	assert(databuf_append(&db, data1, sizeof(data1) - 1) == 1);
+	assert(db.len == 4 && db.offset == 0);
+	assert(memcmp(databuf_beg(&db), "abcd", 4) == 0);
+
+	assert(databuf_append(&db, data2, sizeof(data2) - 1) == 1);
+	assert(db.len == 6 && db.offset == 0);
+	assert(memcmp(databuf_beg(&db), "abcdef", 6) == 0);
+
+	assert(databuf_advance(&db, 3) == 1);
+	assert(db.offset == 3 && db.len == 3);
+	assert(memcmp(databuf_beg(&db), "def", 3) == 0);
+
+	assert(databuf_append(&db, data3, sizeof(data3) - 1) == 1);
+	assert(db.offset == 0 && db.len == 7);
+	assert(memcmp(databuf_beg(&db), "defghij", 7) == 0);
+
+	databuf_free(&db);
+}
+
+static void test_preserve(void)
+{
+	DataBuf db;
+	char data1[] = "abcd";
+	char data2[] = "efgh";
+	char big[] = "01234567";
+
+	assert(databuf_init(&db, 8, DATABUF_FLAG_PRESERVE_HEAD) == 1);
+	assert(databuf_append(&db, data1, 4) == 1);
+	assert(databuf_advance(&db, 2) == 1);
+	assert(databuf_append(&db, data2, 4) == 1);
+	assert(db.offset == 2 && db.len == 6);
+
+	assert(databuf_reset(&db) == 1);
+	assert(db.offset == 0 && db.len == 6);
+	assert(memcmp(databuf_beg(&db), "abcdef", 6) == 0);
+
+	assert(databuf_replace(&db, "xy", 2) == 1);
+	assert(databuf_advance(&db, 2) == 1);
+	assert(databuf_append(&db, big, 8) == 1);
+	assert(db.offset == 2 && db.len == 8);
+
+	assert(databuf_reset(&db) == 1);
+	assert(db.offset == 0 && db.len == 8);
+	assert(memcmp(databuf_beg(&db), "xy012345", 8) == 0);
+
+	databuf_free(&db);
+}
+
+int main(void)
+{
+	test_basic();
+	test_preserve();
+	printf("databuf tests: all passed\n");
+	return 0;
+}
+