updates

internal/assignment/maxactive_test.go

@@ -0,0 +1,32 @@
+package assignment
+
+import "testing"
+
+// The per-miler concurrent-stop cap.
+//
+// This is the knob that now decides how much one rider carries, because
+// eligibility no longer stops at the first order. It is read per call so it
+// can be changed without a redeploy — and a typo must never uncap the fleet.
+func TestMaxActiveBookings(t *testing.T) {
+	cases := []struct {
+		env  string
+		want int64
+		why  string
+	}{
+		{"", defaultMaxActive, "unset falls back to the default"},
+		{"10", 10, "a plain number is honoured"},
+		{" 8 ", 8, "surrounding whitespace is tolerated"},
+		{"1", 1, "one stop at a time is a legitimate policy"},
+		{"0", defaultMaxActive, "zero would assign to nobody — treated as unset, not as a cap"},
+		{"-4", defaultMaxActive, "negative is meaningless here"},
+		{"lots", defaultMaxActive, "a typo must not uncap the fleet"},
+		{"3.5", defaultMaxActive, "not an integer"},
+	}
+
+	for _, tc := range cases {
+		t.Setenv("MILER_MAX_ACTIVE_BOOKINGS", tc.env)
+		if got := maxActiveBookings(); got != tc.want {
+			t.Errorf("MILER_MAX_ACTIVE_BOOKINGS=%q gave %d, want %d (%s)", tc.env, got, tc.want, tc.why)
+		}
+	}
+}