json: new module for parsing and generating JSON

[ccan] / ccan / json / test / run-stringify.c

diff --git a/ccan/json/test/run-stringify.c b/ccan/json/test/run-stringify.c
new file mode 100644 (file)
index 0000000..3a4cb73
--- /dev/null
+++ b/ccan/json/test/run-stringify.c
@@ -0,0 +1,108 @@
+#include "common.h"
+
+static char buf1[256], buf2[256];
+
+/* Used for pass and fail messages */
+static char *quote_string(const char *str, char buf[256])
+{
+       char *out = buf;
+       
+       *out++ = '"';
+       for (; *str != 0; str++) {
+               if (out - buf > 256 - 5) {
+                       /* String is too long.  End it with `...' */
+                       out = buf + 256 - 5;
+                       *out++ = '.';
+                       *out++ = '.';
+                       *out++ = '.';
+                       break;
+               }
+               switch (*str) {
+                       case '\t':
+                               *out++ = '\\';
+                               *out++ = 't';
+                               break;
+                       case '\n':
+                               *out++ = '\\';
+                               *out++ = 'n';
+                               break;
+                       case '"':
+                               *out++ = '\\';
+                               *out++ = '"';
+                               break;
+                       case '\\':
+                               *out++ = '\\';
+                               *out++ = '\\';
+                               break;
+                       default:
+                               *out++ = *str;
+                               break;
+               }
+       }
+       *out++ = '"';
+       
+       *out = 0;
+       return buf;
+}
+
+static void test_stringify(const char *input, const char *expected)
+{
+       JsonNode *node = NULL;
+       char *enc = NULL;
+       char *strn = NULL;
+       char *str = NULL;
+       
+       node = json_decode(input);
+       if (node == NULL) {
+               fail("Failed to decode %s", input);
+               goto end;
+       }
+       
+       enc = json_encode(node);
+       if (strcmp(enc, input) != 0) {
+               fail("%s re-encodes to %s.  Either encode/decode is broken, or the input string needs to be normalized", input, enc);
+               goto end;
+       }
+       
+       strn = json_stringify(node, NULL);
+       if (strcmp(strn, enc) != 0) {
+               fail("json_stringify with NULL space produced a different string than json_encode");
+               goto end;
+       }
+       
+       str = json_stringify(node, "\t");
+       if (strcmp(str, expected) != 0) {
+               fail("Expected %s, but json_stringify produced %s",
+                        quote_string(expected, buf1), quote_string(str, buf2));
+               goto end;
+       }
+       
+       pass("stringify %s", input);
+       
+end:
+       json_delete(node);
+       free(enc);
+       free(strn);
+       free(str);
+}
+
+int main(void)
+{
+       (void) chomp;
+       
+       plan_tests(9);
+       
+       test_stringify("[]", "[]");
+       test_stringify("[1]", "[\n\t1\n]");
+       test_stringify("[1,2,3]", "[\n\t1,\n\t2,\n\t3\n]");
+       test_stringify("[[]]", "[\n\t[]\n]");
+       test_stringify("[[1,2],[3,4]]", "[\n\t[\n\t\t1,\n\t\t2\n\t],\n\t[\n\t\t3,\n\t\t4\n\t]\n]");
+       
+       test_stringify("{}", "{}");
+       test_stringify("{\"one\":1}", "{\n\t\"one\": 1\n}");
+       test_stringify("{\"one\":1,\"t*\":[2,3,10]}", "{\n\t\"one\": 1,\n\t\"t*\": [\n\t\t2,\n\t\t3,\n\t\t10\n\t]\n}");
+       test_stringify("{\"a\":{\"1\":1,\"2\":2},\"b\":{\"3\":[null,false,true,\"\\f\"]}}",
+                                  "{\n\t\"a\": {\n\t\t\"1\": 1,\n\t\t\"2\": 2\n\t},\n\t\"b\": {\n\t\t\"3\": [\n\t\t\tnull,\n\t\t\tfalse,\n\t\t\ttrue,\n\t\t\t\"\\f\"\n\t\t]\n\t}\n}");
+       
+       return exit_status();
+}