improved TCString support

binding-tests/string.cpp

@@ -0,0 +1,29 @@
+#include <string.h>
+#include "doctest.h"
+#include "taskchampion.h"
+
+TEST_CASE("creating borrowed strings does not crash") {
+    TCString *s = tc_string_new("abcdef");
+    tc_string_free(s);
+}
+
+TEST_CASE("creating cloned strings does not crash") {
+    char *abcdef = strdup("abcdef");
+    TCString *s = tc_string_clone(abcdef);
+    free(abcdef);
+    CHECK(strcmp(tc_string_content(s), "abcdef") == 0);
+    tc_string_free(s);
+}
+
+TEST_CASE("strings echo back their content") {
+    TCString *s = tc_string_new("abcdef");
+    CHECK(strcmp(tc_string_content(s), "abcdef") == 0);
+    tc_string_free(s);
+}
+
+TEST_CASE("tc_string_content returns NULL for strings containing embedded NULs") {
+    TCString *s = tc_string_clone_with_len("ab\0de", 5);
+    REQUIRE(s != NULL);
+    CHECK(tc_string_content(s) == NULL);
+    tc_string_free(s);
+}