Add missing quadtree test file.

1 files changed, 122 insertions, 0 deletions

diff --git a/tests/data/quadtree.scm b/tests/data/quadtree.scm
new file mode 100644
index 0000000..1dd37cc
--- /dev/null
+++ b/tests/data/quadtree.scm
@@ -0,0 +1,122 @@
+;;; Chickadee Game Toolkit
+;;; Copyright © 2021 David Thompson <davet@gnu.org>
+;;;
+;;; Chickadee 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.
+;;;
+;;; Chickadee 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 this program.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+(define-module (tests data quadtree)
+  #:use-module (tests utils)
+  #:use-module (srfi srfi-64)
+  #:use-module (chickadee data quadtree)
+  #:use-module (chickadee math rect))
+
+(define (quadtree)
+  (make-quadtree (make-rect 0 0 100 100) #:max-size 3 #:max-depth 2))
+
+(with-tests "quadtree"
+  (test-group "quadtree-insert!"
+    (test-group "inserting a single object"
+      (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'foo)
+        (test-equal (quadtree-size q) 1)
+        (test-assert (quadtree-leaf? q))))
+    (test-group "inserting maximum objects for one node"
+      (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'foo)
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'bar)
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'baz)
+        (test-equal (quadtree-size q) 3)
+        (test-assert (quadtree-leaf? q))))
+    (test-group "splitting where all objects move to child nodes"
+      (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 60.0 60.0 10.0 10.0) 'foo)
+        (quadtree-insert! q (make-rect 10.0 60.0 10.0 10.0) 'bar)
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'baz)
+        (quadtree-insert! q (make-rect 60.0 10.0 10.0 10.0) 'frob)
+        (test-equal (quadtree-size q) 0)
+        (test-assert (not (quadtree-leaf? q)))))
+    (test-group "splitting where all objects stay in parent node"
+      (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 45.0 45.0 10.0 10.0) 'foo)
+        (quadtree-insert! q (make-rect 45.0 45.0 10.0 10.0) 'bar)
+        (quadtree-insert! q (make-rect 45.0 45.0 10.0 10.0) 'baz)
+        (quadtree-insert! q (make-rect 45.0 45.0 10.0 10.0) 'frob)
+        (test-equal (quadtree-size q) 4)
+        (test-assert (quadtree-leaf? q)))))
+  (test-group "quadtree-delete!"
+    (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'foo)
+        (quadtree-delete! q (make-rect 10.0 10.0 10.0 10.0) 'foo)
+        (test-equal "deleting from a root node with 1 object"
+          (quadtree-size q) 0))
+    (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'foo)
+        (quadtree-insert! q (make-rect 20.0 10.0 10.0 10.0) 'bar)
+        (quadtree-insert! q (make-rect 30.0 10.0 10.0 10.0) 'baz)
+        (quadtree-delete! q (make-rect 30.0 10.0 10.0 10.0) 'bar)
+        (test-equal "deleting from a root node with multiple objects"
+          (quadtree-size q) 2))
+    (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'foo)
+        (quadtree-insert! q (make-rect 15.0 10.0 10.0 10.0) 'bar)
+        (quadtree-insert! q (make-rect 20.0 10.0 10.0 10.0) 'baz)
+        (quadtree-insert! q (make-rect 25.0 10.0 10.0 10.0) 'frob)
+        (test-assert "deleting from a lower node"
+          (quadtree-delete! q (make-rect 25.0 10.0 10.0 10.0) 'frob)))
+    (let ((q (quadtree)))
+      (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'foo)
+      (quadtree-insert! q (make-rect 15.0 10.0 10.0 10.0) 'bar)
+      (quadtree-insert! q (make-rect 20.0 10.0 10.0 10.0) 'baz)
+      (quadtree-insert! q (make-rect 25.0 10.0 10.0 10.0) 'frob)
+      (quadtree-delete! q (make-rect 10.0 10.0 10.0 10.0) 'foo)
+      (test-assert "clearing out a level"
+        (quadtree-leaf? (quadtree-q3 q)))))
+  (test-group "quadtree-fold"
+    (test-equal "rect within a single leaf node at level 0"
+      (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 60.0 60.0 10.0 10.0) 'one)
+        (quadtree-insert! q (make-rect 10.0 60.0 10.0 10.0) 'two)
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'three)
+        (quadtree-insert! q (make-rect 60.0 10.0 10.0 10.0) 'four)
+        (quadtree-insert! q (make-rect 45.0 45.0 10.0 10.0) 'five)
+        (quadtree-fold q (make-rect 0.0 0.0 40.0 40.0) '() cons))
+      '(three five))
+    (test-equal "rect spans multiple nodes at level 1"
+      (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 60.0 60.0 10.0 10.0) 'one)
+        (quadtree-insert! q (make-rect 10.0 60.0 10.0 10.0) 'two)
+        (quadtree-insert! q (make-rect 10.0 10.0 10.0 10.0) 'three)
+        (quadtree-insert! q (make-rect 60.0 10.0 10.0 10.0) 'four)
+        (quadtree-insert! q (make-rect 45.0 45.0 10.0 10.0) 'five)
+        (quadtree-fold q (make-rect 0.0 0.0 60.0 40.0) '() cons))
+      '(four three five))
+    (test-equal "rect within a single leaf node at level 2"
+      (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 80.0 80.0 10.0 10.0) 'one)
+        (quadtree-insert! q (make-rect 60.0 80.0 10.0 10.0) 'two)
+        (quadtree-insert! q (make-rect 60.0 60.0 10.0 10.0) 'three)
+        (quadtree-insert! q (make-rect 80.0 60.0 10.0 10.0) 'four)
+        (quadtree-insert! q (make-rect 65.0 65.0 10.0 10.0) 'five)
+        (quadtree-insert! q (make-rect 45.0 45.0 10.0 10.0) 'six)
+        (quadtree-fold q (make-rect 76.0 76.0 20.0 20.0) '() cons))
+      '(one five six))
+    (test-equal "rect spans multiple nodes at level 2"
+      (let ((q (quadtree)))
+        (quadtree-insert! q (make-rect 70.0 70.0 10.0 10.0) 'one)
+        (quadtree-insert! q (make-rect 60.0 80.0 10.0 10.0) 'two)
+        (quadtree-insert! q (make-rect 60.0 60.0 10.0 10.0) 'three)
+        (quadtree-insert! q (make-rect 80.0 60.0 10.0 10.0) 'four)
+        (quadtree-insert! q (make-rect 45.0 45.0 10.0 10.0) 'five)
+        (quadtree-fold q (make-rect 70.0 70.0 20.0 20.0) '() cons))
+      '(four three two one five))))