test/core: tweak tests to work with tis-interpreter

 $ tis-inertpreter.sh --cc "-I. -I../.." text.c ../../text.c

or more conveniently

 $ make tis

1 files changed, 42 insertions, 0 deletions

diff --git a/core/tap.h b/core/tap.h
new file mode 100644
index 0000000..98f5a35
--- /dev/null
+++ b/core/tap.h
@@ -0,0 +1,42 @@
+#ifndef TAP_H
+#define TAP_H
+
+#ifdef TIS_INTERPRETER
+static int failures = 0;
+static int test_count = 0;
+static void plan_no_plan(void) { }
+
+static int exit_status() {
+	if (failures > 255)
+		failures = 255;
+	return failures;
+} 
+
+#define ok(e, ...) do { \
+	bool _e = (e); \
+	printf("%sok %d - ", _e ? "" : "not ", ++test_count); \
+	printf(__VA_ARGS__); \
+	if (!_e) { \
+		failures++; \
+		printf(" Failed test (%s:%s() at line %d)\n", __FILE__, __func__, __LINE__); \
+	} \
+} while (0)
+
+#define skip_if(cond, n, ...)                          \
+        if (cond) skip((n), __VA_ARGS__);              \
+        else
+
+#define skip(n, ...) do { \
+	int _n = (n); \
+	while (_n--) { \
+		printf("ok %d # skip ", ++test_count); \
+		printf(__VA_ARGS__); \
+	} \
+} while (0)
+
+#else
+#include <ccan/tap/tap.h>
+#define TIS_INTERPRETER 0
+#endif
+
+#endif