--- /dev/null
+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2012 Joe Neeman <joeneeman@gmail.com>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "interval-set.hh"
+
+#include "yaffut.hh"
+
+using namespace std;
+
+FUNC (interval_set_union)
+{
+ vector<Interval> ivs;
+
+ // Overlapping intervals.
+ ivs.push_back (Interval (-1, 1));
+ ivs.push_back (Interval (0, 3));
+ ivs.push_back (Interval (1, 2));
+ Interval_set result = Interval_set::interval_union (ivs);
+ EQUAL (result.intervals ().size (), 1);
+ // Compare intervals using to_string, since yaffut doesn't know how to compare intervals.
+ EQUAL (result.intervals ()[0].to_string (), Interval (-1, 3).to_string ());
+
+ // Non-overlapping intervals.
+ ivs.push_back (Interval (-5, -4));
+ result = Interval_set::interval_union (ivs);
+ EQUAL (result.intervals ().size (), 2);
+ EQUAL (result.intervals ()[0].to_string (), Interval (-5, -4).to_string ());
+ EQUAL (result.intervals ()[1].to_string (), Interval (-1, 3).to_string ());
+
+ // Infinite intervals.
+ ivs.push_back (Interval (-infinity_f, -4));
+ result = Interval_set::interval_union (ivs);
+ EQUAL (result.intervals ().size (), 2);
+ EQUAL (result.intervals ()[0].to_string (), Interval (-infinity_f, -4).to_string ());
+ EQUAL (result.intervals ()[1].to_string (), Interval (-1, 3).to_string ());
+
+ // Empty intervals.
+ ivs.push_back (Interval (infinity_f, -infinity_f));
+ result = Interval_set::interval_union (ivs);
+ EQUAL (result.intervals ().size (), 2);
+}
+
+FUNC (interval_set_nearest_point)
+{
+ vector<Interval> ivs;
+
+ ivs.push_back (Interval (-3, -1));
+ ivs.push_back (Interval (1, 3));
+ Interval_set set = Interval_set::interval_union (ivs);
+
+ // If the point is in the set, direction does not matter.
+ EQUAL (set.nearest_point (-2, UP), -2);
+ EQUAL (set.nearest_point (-2, DOWN), -2);
+ EQUAL (set.nearest_point (-2, CENTER), -2);
+
+ // If the point is not in the set, direction does matter.
+ EQUAL (set.nearest_point (-0.5, UP), 1);
+ EQUAL (set.nearest_point (-0.5, DOWN), -1);
+ EQUAL (set.nearest_point (-0.5, CENTER), -1);
+ EQUAL (set.nearest_point (0.5, CENTER), 1);
+
+ // The return value can be +- infinity.
+ EQUAL (set.nearest_point (5, UP), infinity_f);
+ EQUAL (set.nearest_point (5, DOWN), 3);
+ EQUAL (set.nearest_point (-5, DOWN), -infinity_f);
+ EQUAL (set.nearest_point (-5, UP), -3);
+}
+
+FUNC (interval_set_complement)
+{
+ vector<Interval> ivs;
+
+ ivs.push_back (Interval (-3, -1));
+ ivs.push_back (Interval (1, 3));
+ Interval_set set = Interval_set::interval_union (ivs).complement ();
+ EQUAL (set.intervals ().size (), 3);
+ EQUAL (set.intervals ()[0].to_string (), Interval (-infinity_f, -3).to_string ());
+ EQUAL (set.intervals ()[1].to_string (), Interval (-1, 1).to_string ());
+ EQUAL (set.intervals ()[2].to_string (), Interval (3, infinity_f).to_string ());
+
+ // Half-infinite sets are handled correctly.
+ ivs.push_back (Interval (-infinity_f, -2));
+ set = Interval_set::interval_union (ivs).complement ();
+ EQUAL (set.intervals ().size (), 2);
+ EQUAL (set.intervals ()[0].to_string (), Interval (-1, 1).to_string ());
+ EQUAL (set.intervals ()[1].to_string (), Interval (3, infinity_f).to_string ());
+
+ // Full and empty sets are handled correctly.
+ set = Interval_set ().complement ();
+ EQUAL (set.intervals ().size (), 1);
+ EQUAL (set.intervals ()[0].to_string (), Interval (-infinity_f, infinity_f).to_string ());
+ set = set.complement ();
+ EQUAL (set.intervals ().size (), 0);
+}