add test for bad inputs

test/problems/test_fails.h

@@ -0,0 +1,43 @@
+#include "glbopts.h"
+#include "minunit.h"
+#include "problem_utils.h"
+#include "scs.h"
+#include "util.h"
+
+static const char *test_fails(void) {
+  scs_printf("Testing that SCS handles bad inputs correctly:");
+
+  ScsCone *k = (ScsCone *)scs_calloc(1, sizeof(ScsCone));
+  ScsData *d = (ScsData *)scs_calloc(1, sizeof(ScsData));
+  ScsSettings *stgs = (ScsSettings *)scs_calloc(1, sizeof(ScsSettings));
+  ScsSolution *sol = (ScsSolution *)scs_calloc(1, sizeof(ScsSolution));
+  ScsSolution *opt_sol = (ScsSolution *)scs_calloc(1, sizeof(ScsSolution));
+  ScsInfo info = {0};
+  scs_float p_f = 0.1;
+  int seed = 1234;
+  scs_int n = 1;
+  scs_int m = 3;
+  scs_int col_nnz = (scs_int)ceil(sqrt(n));
+  scs_int nnz = n * col_nnz;
+  scs_int exitflag;
+
+  k->z = (scs_int)floor(m * p_f);
+  k->l = m - k->z;
+
+  d->m = m;
+  d->n = n;
+  gen_random_prob_data(nnz, col_nnz, d, k, opt_sol, seed);
+  SCS(set_default_settings)(stgs);
+
+  /* TODO test more failure modes */
+  stgs->eps_abs = -1;
+
+  exitflag = scs(d, k, stgs, sol, &info);
+
+  mu_assert("test_fails: SCS failed to produce outputflag SCS_FAILED",
+            exitflag == SCS_FAILED);
+  SCS(free_data)(d, k, stgs);
+  SCS(free_sol)(sol);
+  SCS(free_sol)(opt_sol);
+  return 0;
+}

test/run_tests.c

@@ -14,11 +14,14 @@
 #include "problems/random_prob.h"
 #include "problems/rob_gauss_cov_est.h"
 #include "problems/small_lp.h"
+#include "problems/test_fails.h"
 #include "problems/unbounded_tiny_qp.h"
 
 int tests_run = 0;
 
 static const char *all_tests(void) {
+  scs_printf("test_fails\n");
+  mu_run_test(test_fails);
   scs_printf("degenerate\n");
   mu_run_test(degenerate);
   scs_printf("small_lp\n");