opt: much prettier usage (using terminal size)

[ccan] / ccan / opt / test / run-add_desc.c

diff --git a/ccan/opt/test/run-add_desc.c b/ccan/opt/test/run-add_desc.c
new file mode 100644 (file)
index 0000000..ded3f88
--- /dev/null
+++ b/ccan/opt/test/run-add_desc.c
@@ -0,0 +1,164 @@
+#include <ccan/tap/tap.h>
+#include <ccan/opt/opt.c>
+#include <ccan/opt/usage.c>
+#include <ccan/opt/helpers.c>
+#include <ccan/opt/parse.c>
+
+static void show_10(char buf[OPT_SHOW_LEN], const void *arg)
+{
+       memset(buf, 'X', 10);
+       buf[10] = '\0';
+}
+
+static void show_max(char buf[OPT_SHOW_LEN], const void *arg)
+{
+       memset(buf, 'X', OPT_SHOW_LEN);
+}
+
+/* Test add_desc helper. */
+int main(int argc, char *argv[])
+{
+       struct opt_table opt;
+       char *ret;
+       size_t len, max;
+
+       plan_tests(30);
+
+       opt.show = NULL;
+       opt.names = "01234";
+       opt.desc = "0123456789 0";
+       opt.type = OPT_NOARG;
+       len = max = 0;
+
+       /* Fits easily. */
+       ret = add_desc(NULL, &len, &max, 10, 30, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret, "01234     0123456789 0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* Name just fits. */
+       ret = add_desc(NULL, &len, &max, 7, 30, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret, "01234  0123456789 0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* Name doesn't fit. */
+       ret = add_desc(NULL, &len, &max, 6, 30, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret,
+                  "01234\n"
+                  "      0123456789 0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* Description just fits. */
+       ret = add_desc(NULL, &len, &max, 7, 19, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret, "01234  0123456789 0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* Description doesn't quite fit. */
+       ret = add_desc(NULL, &len, &max, 7, 18, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret,
+                  "01234  0123456789\n"
+                  "       0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* Neither quite fits. */
+       ret = add_desc(NULL, &len, &max, 6, 17, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret, 
+                  "01234\n"
+                  "      0123456789\n"
+                  "      0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* With show function, fits just. */
+       opt.show = show_10;
+       ret = add_desc(NULL, &len, &max, 7, 41, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret, "01234  0123456789 0 (default: XXXXXXXXXX)\n") == 0);
+       free(ret); len = max = 0;
+
+       /* With show function, just too long. */
+       ret = add_desc(NULL, &len, &max, 7, 40, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret,
+                  "01234  0123456789 0\n"
+                  "        (default: XXXXXXXXXX)\n") == 0);
+       free(ret); len = max = 0;
+
+       /* With maximal show function, fits just (we assume OPT_SHOW_LEN = 80. */
+       opt.show = show_max;
+       ret = add_desc(NULL, &len, &max, 7, 114, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret, "01234  0123456789 0 (default: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX...)\n") == 0);
+       free(ret); len = max = 0;
+
+       /* With maximal show function, just too long. */
+       ret = add_desc(NULL, &len, &max, 7, 113, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret,
+                  "01234  0123456789 0\n"
+                  "        (default: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX...)\n") == 0);
+       free(ret); len = max = 0;
+
+       /* With added " <arg>".  Fits, just. */
+       opt.show = NULL;
+       opt.type = OPT_HASARG;
+       ret = add_desc(NULL, &len, &max, 13, 25, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret, "01234 <arg>  0123456789 0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* With added " <arg>".  Name doesn't quite fit. */
+       ret = add_desc(NULL, &len, &max, 12, 25, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret,
+                  "01234 <arg>\n"
+                  "            0123456789 0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* With added " <arg>".  Desc doesn't quite fit. */
+       ret = add_desc(NULL, &len, &max, 13, 24, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret,
+                  "01234 <arg>  0123456789\n"
+                  "             0\n") == 0);
+       free(ret); len = max = 0;
+
+       /* Empty description, with <arg> and default.  Just fits. */
+       opt.show = show_10;
+       opt.desc = "";
+       ret = add_desc(NULL, &len, &max, 13, 35, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret, "01234 <arg>   (default: XXXXXXXXXX)\n") == 0);
+       free(ret); len = max = 0;
+
+       /* Empty description, with <arg> and default.  Doesn't quite fit. */
+       opt.show = show_10;
+       opt.desc = "";
+       ret = add_desc(NULL, &len, &max, 13, 34, &opt);
+       ok1(len < max);
+       ret[len] = '\0';
+       ok1(strcmp(ret,
+                  "01234 <arg>  \n"
+                  "              (default: XXXXXXXXXX)\n") == 0);
+       free(ret); len = max = 0;
+
+       return exit_status();
+}