Initial release

vm/tests/test-progress-gate.c

@@ -0,0 +1,155 @@
+/* cc -Wall -Werror -I vm -o /tmp/test-progress-gate \
+ *   vm/tests/test-progress-gate.c vm/progress-gate.c -lm && /tmp/test-progress-gate */
+#include <stdio.h>
+#include <math.h>
+
+#include "progress-gate.h"
+
+static int failures;
+
+#define EXPECT(got, want)                                                     \
+  do {                                                                        \
+    int g_ = (got), w_ = (want);                                              \
+    if (g_ != w_) {                                                           \
+      printf ("FAIL %s:%d: %s = %d, want %d\n", __FILE__, __LINE__, #got, g_, \
+          w_);                                                                \
+      failures++;                                                             \
+    }                                                                         \
+  } while (0)
+
+static ProgressGate
+navigated_gate (void)
+{
+  ProgressGate g;
+  progress_gate_init (&g);
+  progress_gate_navigated (&g);
+  return g;
+}
+
+static void
+drops_everything_before_navigation (void)
+{
+  ProgressGate g;
+  progress_gate_init (&g);
+  EXPECT (progress_gate_feed (&g, 10), -1);
+  EXPECT (progress_gate_feed (&g, 100), -1);
+  EXPECT (g.last_sent, -1);
+}
+
+static void
+late_bootstrap_100_is_not_page_loaded (void)
+{
+  ProgressGate g = navigated_gate ();
+  EXPECT (progress_gate_feed (&g, 100), -1);
+  EXPECT (progress_gate_feed (&g, 10), 10);
+  EXPECT (progress_gate_feed (&g, 100), 100);
+}
+
+static void
+rate_limits_increases_but_always_sends_100_once (void)
+{
+  ProgressGate g = navigated_gate ();
+  EXPECT (progress_gate_feed (&g, 10), 10);
+  EXPECT (progress_gate_feed (&g, 12), -1);
+  EXPECT (progress_gate_feed (&g, 15), 15);
+  EXPECT (progress_gate_feed (&g, 98), 98);
+  EXPECT (progress_gate_feed (&g, 100), 100);
+  EXPECT (progress_gate_feed (&g, 100), -1);
+}
+
+static void
+decrease_is_a_new_navigation_and_sent_immediately (void)
+{
+  ProgressGate g = navigated_gate ();
+  EXPECT (progress_gate_feed (&g, 10), 10);
+  EXPECT (progress_gate_feed (&g, 100), 100);
+  EXPECT (progress_gate_feed (&g, 30), 30);
+  EXPECT (progress_gate_feed (&g, 32), -1);
+  EXPECT (progress_gate_feed (&g, 100), 100);
+}
+
+static void
+first_value_after_navigation_is_always_sent (void)
+{
+  ProgressGate g = navigated_gate ();
+  EXPECT (progress_gate_feed (&g, 0), 0);
+  EXPECT (progress_gate_feed (&g, 3), -1);
+}
+
+static void
+floors_and_clamps_values (void)
+{
+  ProgressGate g = navigated_gate ();
+  EXPECT (progress_gate_feed (&g, -5), 0);
+  EXPECT (progress_gate_feed (&g, 99.9), 99);
+  EXPECT (progress_gate_feed (&g, 150), 100);
+}
+
+static void
+navigating_again_rearms_the_bootstrap_guard (void)
+{
+  ProgressGate g = navigated_gate ();
+  EXPECT (progress_gate_feed (&g, 50), 50);
+  progress_gate_navigated (&g);
+  EXPECT (progress_gate_feed (&g, 100), -1);
+}
+
+static void
+observed_wikipedia_sequence (void)
+{
+  ProgressGate g;
+  progress_gate_init (&g);
+  EXPECT (progress_gate_feed (&g, 10.0), -1);
+  EXPECT (progress_gate_feed (&g, 100.0), -1);
+  progress_gate_navigated (&g);
+  EXPECT (progress_gate_feed (&g, 10.0), 10);
+  EXPECT (progress_gate_feed (&g, 10.3), -1);
+  EXPECT (progress_gate_feed (&g, 48.7), 48);
+  EXPECT (progress_gate_feed (&g, 63.7), 63);
+  EXPECT (progress_gate_feed (&g, 84.4), 84);
+  EXPECT (progress_gate_feed (&g, 86.0), -1);
+  EXPECT (progress_gate_feed (&g, 86.4), -1);
+  EXPECT (progress_gate_feed (&g, 100.0), 100);
+}
+
+static void
+non_finite_values_are_dropped (void)
+{
+  ProgressGate g = navigated_gate ();
+  EXPECT (progress_gate_feed (&g, 10), 10);
+  EXPECT (progress_gate_feed (&g, NAN), -1);
+  EXPECT (progress_gate_feed (&g, INFINITY), -1);
+  EXPECT (progress_gate_feed (&g, -INFINITY), -1);
+  EXPECT (g.last_sent, 10);
+}
+
+static void
+navigation_starts_a_fresh_load (void)
+{
+  ProgressGate g = navigated_gate ();
+  EXPECT (progress_gate_feed (&g, 50), 50);
+  progress_gate_navigated (&g);
+  EXPECT (g.last_sent, -1);
+  EXPECT (progress_gate_feed (&g, 52), 52);
+}
+
+int
+main (void)
+{
+  drops_everything_before_navigation ();
+  late_bootstrap_100_is_not_page_loaded ();
+  rate_limits_increases_but_always_sends_100_once ();
+  decrease_is_a_new_navigation_and_sent_immediately ();
+  first_value_after_navigation_is_always_sent ();
+  floors_and_clamps_values ();
+  navigating_again_rearms_the_bootstrap_guard ();
+  observed_wikipedia_sequence ();
+  non_finite_values_are_dropped ();
+  navigation_starts_a_fresh_load ();
+  if (failures) {
+    printf ("progress-gate: %d failure(s)\n", failures);
+    return 1;
+  }
+  printf ("progress-gate: all tests passed\n");
+  return 0;
+}