add focused unit and map checks

tests/test_util.c

@@ -0,0 +1,32 @@
+#include "test.h"
+
+Str
+mkstr(char *s)
+{
+	Str r;
+
+	sinit(&r, s, strlen(s));
+	return r;
+}
+
+int
+checkstr(struct ct *t, char *where, char *want, Str *got)
+{
+	char buf[Maxutf];
+
+	stoutf(got, buf, sizeof buf);
+	if(strcmp(want, buf) == 0)
+		return 1;
+	return CT_ERRORF(t, "%s: want \"%s\", got \"%s\"",
+		where, want, buf);
+}
+
+Str
+shownpre(Im *state)
+{
+	Str shown;
+
+	if(state->l->map != nil && mapget(state->l->map, &state->pre, &shown))
+		return shown;
+	return state->pre;
+}