Update TESTCASES.md

TESTCASES.md

@@ -4,4 +4,42 @@ Series of manually performed test cases for scenarios that are difficult / not f
 
 ## Tests
 
+### Verify all sibling tiles load when loadSiblings = true
+
+TODO
+
+### Verify sibling tiles do _not_ load when loadSiblings = false
+
+TODO
+
+### Verify that active tiles render when displayActiveTiles = true
+
+TODO
+
+### Verify tiles load up to errorTarget option
+
+TODO
+
+### Verify parent tiles do not load outside of the errorThreshold option
+
+TODO
+
+### Verify tiles do not display past the maxDepth threshold
+
+TODO
+
+### Verify that tiles do not change when update() is not called
+
+TODO
+
+### Verify that multiple cameras are taken into account when calculating error
+
+TODO
+
+### Verify that raycasting works as expected
+
+TODO
+
+### Verify debug bounds display when displayBoxBounds = true
+
 TODO