From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 17 Nov 2019 11:45:57 +0000 (+0000)
Subject: Provide test cases for maxlen functions
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=base91.git;a=commitdiff_plain;h=664054e8f603f09badb98ef09ee1bd1e58d93659

Provide test cases for maxlen functions

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/.gitignore b/.gitignore
index 9fa91e1..4863b4e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,8 @@
 /base91
+/lentest
 *.o
 /test/b91dec
 /test/b91enc
+/test/lentest
 /test/*.dat
 /test/*.b91
diff --git a/Makefile b/Makefile
index 246aede..feb0e45 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ mandir = $(prefix)/share/man
 man1dir = $(mandir)/man1
 manext = .1
 
-BIN = base91
+BIN = base91 lentest
 
 .PHONY: all install check clean
 
@@ -25,6 +25,8 @@ all: $(BIN)
 base91: cli.o base91.o
 	$(CC) $(LDFLAGS) -o $@ $^
 
+lentest: lentest.o base91.o
+
 install: all
 	mkdir -p $(DESTDIR)$(bindir)
 	$(INSTALL_PROGRAM) base91 $(DESTDIR)$(bindir)/base91
diff --git a/lentest.c b/lentest.c
new file mode 100644
index 0000000..3e43d70
--- /dev/null
+++ b/lentest.c
@@ -0,0 +1,93 @@
+/*
+ * basE91 length calculation test
+ *
+ * Copyright (c) 2019 Ian Jackson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  - Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  - 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.
+ *  - Neither the name of Joachim Henke nor the names of his contributors may
+ *    be used to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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 <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "base91.h"
+
+static size_t upto = (14*16 + 14 + 16)*2;
+
+static int do_test(int do_do, int fill, const char *what,
+	size_t f(struct basE91 *, const void *, size_t, void *),
+	size_t f_end(struct basE91 *, void *),
+	size_t f_maxlen(size_t)
+										)
+{
+	struct basE91 b;
+	size_t i, o, exp;
+	int bad = 0;
+	char ibuf[upto];
+	char obuf[upto*2+100]; /* in case we have bugs */
+
+	memset(ibuf,fill,upto);
+
+	if (!do_do) {
+		printf("%s: skipping\n",what);
+		return 0;
+	}
+
+	for (i=0; i<upto; i++) {
+		basE91_init(&b);
+		o = f(&b, ibuf, i, obuf);
+		o += f_end(&b, obuf+o);
+
+		exp = f_maxlen(i);
+		if (o == exp) continue;
+
+		bad = 1;
+		fprintf(stderr,"%s: i=%lu o=%lu expected=%lu\n",
+						what, (unsigned long)i, (unsigned long)o, (unsigned long)exp);
+	}
+	return bad;
+}
+
+int main(int argc, const char **argv) {
+	int do_encode=1, do_decode=1, bad=0;
+
+	if (argc>=2) {
+		do_encode = !!strchr(argv[1],'e');
+		do_decode = !!strchr(argv[1],'d');
+	}
+	if (argc>=3) {
+		upto = atoi(argv[2]);
+	}
+
+#define MAYBE_DO_TEST(ed, fill) \
+	(bad |= do_test(do_##ed, (fill), #ed, \
+									basE91_##ed, basE91_##ed##_end, basE91_##ed##_maxlen))
+	MAYBE_DO_TEST(encode, 0xff);
+	MAYBE_DO_TEST(decode, 'A');
+
+	if (bad) exit(8);
+	printf("ok\n");
+	exit(0);
+}
diff --git a/test/Makefile b/test/Makefile
index 48e3906..2ce31df 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -5,6 +5,7 @@ SHELL = /bin/sh
 all:
 	ln -sf ../base91 b91enc
 	ln -sf ../base91 b91dec
+	ln -sf ../lentest .
 	$(SHELL) test.sh
 
 clean:
diff --git a/test/test.sh b/test/test.sh
index cb79d40..09548f9 100644
--- a/test/test.sh
+++ b/test/test.sh
@@ -81,6 +81,10 @@ echo "+-- random data $T"
 fold -w 73 rnd0.b91 | ./b91dec -vvm 89 | cmp rnd0.dat && echo PASSED || fail_exit
 fold -w 71 rnd1.b91 | ./b91dec -vvm 73 | cmp rnd1.dat && echo PASSED || fail_exit
 
+echo "
+maxlength tests:"
+./lentest && echo PASSED || fail_exit
+
 echo '
 ================
 all tests passed