test: Add unit test for strlcpy() and strlcat()

test/.gitignore

@@ -12,4 +12,5 @@ md5
 overlay
 proctitle-init
 proctitle
+strl
 strmode

test/Makefile.am

@@ -41,6 +41,7 @@ check_PROGRAMS = \
 	fpurge \
 	md5 \
 	proctitle-init \
+	strl \
 	strmode \
 	$(nil)
 

test/strl.c

@@ -0,0 +1,84 @@
+/*
+ * Copyright © 2017 Guillem Jover <guillem@hadrons.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <string.h>
+
+int
+main(int argc, char **argv)
+{
+	char buf[256];
+
+	/* Test copy to 0-sized buffer . */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcpy(buf, "xyz", 0) == 3);
+	assert(strcmp(buf, "") == 0);
+
+	/* Test normal copy. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcpy(buf, "xyz", sizeof(buf)) == 3);
+	assert(strcmp(buf, "xyz") == 0);
+
+	/* Test truncated copy. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcpy(buf, "abcdefabcdef", 10) == 12);
+	assert(strcmp(buf, "abcdefabc") == 0);
+
+	/* Test concat to 0-sized buffer. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abc", 0) == 3);
+	assert(strcmp(buf, "") == 0);
+
+	/* Test concat to full buffer. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abcde", 6) == 5);
+	assert(strcmp(buf, "abcde") == 0);
+	assert(strlcat(buf, "xyz", 5) == 8);
+	assert(strcmp(buf, "abcde") == 0);
+
+	/* Test normal concat. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abc", sizeof(buf)) == 3);
+	assert(strcmp(buf, "abc") == 0);
+	assert(strlcat(buf, "xyz", sizeof(buf)) == 6);
+	assert(strcmp(buf, "abcxyz") == 0);
+
+	/* Test truncated concat. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abcabc", 10) == 6);
+	assert(strcmp(buf, "abcabc") == 0);
+	assert(strlcat(buf, "xyzxyz", 10) == 12);
+	assert(strcmp(buf, "abcabcxyz") == 0);
+
+	/* Test truncated concat w/ truncated dst. */
+	memset(buf, 0, sizeof(buf));
+	assert(strlcat(buf, "abcabc", 10) == 6);
+	assert(strcmp(buf, "abcabc") == 0);
+	assert(strlcat(buf, "xyz", 4) == 7);
+	assert(strcmp(buf, "abcabc") == 0);
+
+	return 0;
+}