tests: add test suite

just picking any actively maintained embeddable framework to write a
bunch of tests with. will swap it out if I hate it.

this single initial test found a big one....

tests/Makefile

@@ -0,0 +1,11 @@
+PREFIX=/usr/local
+
+all:
+		gcc -g -Wall -Werror -pedantic -o main main.c ../mcmc.c
+
+clean:
+		rm -f main main.o
+
+dist: clean
+
+distdir:

tests/main.c

@@ -0,0 +1,28 @@
+#include "utest.h"
+#include "../mcmc.h"
+
+struct tmc_fixt {
+    void *ctx;
+};
+
+UTEST_F_SETUP(tmc_fixt) {
+    utest_fixture->ctx = calloc(1, mcmc_size(MCMC_OPTION_BLANK));
+    ASSERT_TRUE(utest_fixture->ctx);
+}
+
+UTEST_F_TEARDOWN(tmc_fixt) {
+    free(utest_fixture->ctx);
+}
+
+UTEST_F(tmc_fixt, trial) {
+    mcmc_resp_t r;
+    char goodbuf[] = "VALUE foo 0 2\r\nhi\r\n";
+    char badbuf[] = "bad response\r\n";
+    int res = mcmc_parse_buf(utest_fixture->ctx, goodbuf, strlen(goodbuf), &r);
+    ASSERT_GE(res, MCMC_OK);
+
+    res = mcmc_parse_buf(utest_fixture->ctx, badbuf, strlen(badbuf), &r);
+    ASSERT_LT(res, MCMC_OK);
+}
+
+UTEST_MAIN()