Fix CBT unit tests.

src/or/circuitbuild.c

@@ -84,22 +84,26 @@ static void entry_guards_changed(void);
 static int
 circuit_build_times_disabled(void)
 {
-  int consensus_disabled = networkstatus_get_param(NULL, "cbtdisabled",
-                                                   0);
-  int config_disabled = !get_options()->LearnCircuitBuildTimeout;
-  int dirauth_disabled = get_options()->AuthoritativeDir;
-  int state_disabled = (get_or_state()->LastWritten == -1);
-
-  if (consensus_disabled || config_disabled || dirauth_disabled ||
-         state_disabled) {
-    log_info(LD_CIRC,
-             "CircuitBuildTime learning is disabled. "
-             "Consensus=%d, Config=%d, AuthDir=%d, StateFile=%d",
-             consensus_disabled, config_disabled, dirauth_disabled,
-             state_disabled);
-    return 1;
-  } else {
+  if (unit_tests) {
     return 0;
+  } else {
+    int consensus_disabled = networkstatus_get_param(NULL, "cbtdisabled",
+                                                     0);
+    int config_disabled = !get_options()->LearnCircuitBuildTimeout;
+    int dirauth_disabled = get_options()->AuthoritativeDir;
+    int state_disabled = (get_or_state()->LastWritten == -1);
+
+    if (consensus_disabled || config_disabled || dirauth_disabled ||
+           state_disabled) {
+      log_info(LD_CIRC,
+               "CircuitBuildTime learning is disabled. "
+               "Consensus=%d, Config=%d, AuthDir=%d, StateFile=%d",
+               consensus_disabled, config_disabled, dirauth_disabled,
+               state_disabled);
+      return 1;
+    } else {
+      return 0;
+    }
   }
 }
 
@@ -1104,6 +1108,12 @@ circuit_build_times_filter_timeouts(circuit_build_times_t *cbt)
     return 0;
   }
 
+  /* Do not filter for unit tests. They expect the distribution to be
+   * unchanged from run to run. */
+  if (unit_tests) {
+    return 0;
+  }
+
   timeout_rate = circuit_build_times_timeout_rate(cbt);
   max_timeout = (build_time_t)tor_lround(circuit_build_times_calculate_timeout(cbt,
                     circuit_build_times_max_synthetic_quantile()));

src/test/test.c

@@ -494,7 +494,7 @@ test_circuit_timeout(void)
     timeout1 = circuit_build_times_calculate_timeout(&estimate,
                                   CBT_DEFAULT_QUANTILE_CUTOFF/100.0);
     circuit_build_times_set_timeout(&estimate);
-    log_warn(LD_CIRC, "Timeout is %lf, Xm is %d", timeout1, estimate.Xm);
+    log_warn(LD_CIRC, "Timeout1 is %lf, Xm is %d", timeout1, estimate.Xm);
     /* XXX: 5% distribution error may not be the right metric */
   } while (fabs(circuit_build_times_cdf(&initial, timeout0) -
                 circuit_build_times_cdf(&initial, timeout1)) > 0.05
@@ -511,7 +511,7 @@ test_circuit_timeout(void)
                                  CBT_DEFAULT_QUANTILE_CUTOFF/100.0);
 
   circuit_build_times_set_timeout(&final);
-  log_warn(LD_CIRC, "Timeout is %lf, Xm is %d", timeout2, final.Xm);
+  log_warn(LD_CIRC, "Timeout2 is %lf, Xm is %d", timeout2, final.Xm);
 
   test_assert(fabs(circuit_build_times_cdf(&initial, timeout0) -
                    circuit_build_times_cdf(&initial, timeout2)) < 0.05);