fix: parser adding empty levels b/c of blank lines

I'd solved this in dino's parser, finally hit it here.

src/parse/ParsedGame.gd

@@ -27,6 +27,10 @@ func parse(contents):
 		var parser = section_parsers.get(header.to_lower())
 		if parser:
 			chunks = Array(chunks).map(func(c): return c.split("\n"))
+			chunks = chunks.map(func(chunk):
+				return Array(chunk).filter(func(c):
+					return c != "" and c != "\t" and c != "\t\t" and c != "\t\t\t")
+				).filter(func(chunk): return len(chunk) > 0)
 			parsed[header.to_lower()] = parser.call(chunks)
 	return parsed
 

src/parse/Puzz.gd

@@ -1,10 +1,17 @@
 extends Node
 class_name Puzz
 
-static func parse_game_def(path):
-	# could make sure file exists
-	var file = FileAccess.open(path, FileAccess.READ)
-	var contents = file.get_as_text()
+static func parse_game_def(path, opts={}):
+	var contents
+	if path != null:
+		# could make sure file exists
+		var file = FileAccess.open(path, FileAccess.READ)
+		# TODO check if file exists!!
+		contents = file.get_as_text()
+	else:
+		contents = opts.get("contents")
+
+	# TODO check if contents exists!!
 	var game = ParsedGame.new()
 	var parsed = game.parse(contents)
 	return parsed

test/dotHop/gamedef_test.gd

@@ -0,0 +1,57 @@
+extends GdUnitTestSuite
+class_name GameDefTest
+
+func test_level_counts():
+	# TODO these are unnecessarily hard-coded - should move to a more reasonable pattern,
+	# especially so these numbers can move around
+
+	var one = DotHopPuzzle.build_puzzle_node({game_def_path="res://src/puzzles/dothop-one.txt"})
+	assert_int(len(one.game_def.levels)).is_equal(4)
+
+	var two = DotHopPuzzle.build_puzzle_node({game_def_path="res://src/puzzles/dothop-two.txt"})
+	assert_int(len(two.game_def.levels)).is_equal(12)
+
+	var three = DotHopPuzzle.build_puzzle_node({game_def_path="res://src/puzzles/dothop-three.txt"})
+	assert_int(len(three.game_def.levels)).is_equal(10)
+
+	var four = DotHopPuzzle.build_puzzle_node({game_def_path="res://src/puzzles/dothop-four.txt"})
+	assert_int(len(four.game_def.levels)).is_equal(3)
+
+	var five = DotHopPuzzle.build_puzzle_node({game_def_path="res://src/puzzles/dothop-five.txt"})
+	assert_int(len(five.game_def.levels)).is_equal(3)
+
+	var six = DotHopPuzzle.build_puzzle_node({game_def_path="res://src/puzzles/dothop-six.txt"})
+	assert_int(len(six.game_def.levels)).is_equal(3)
+
+func test_expected_level_count():
+	var parsed = Puzz.parse_game_def(null, {contents="
+title DotHop
+author Russell Matney
+
+=======
+LEGEND
+=======
+
+. = Background
+a = Player
+o = Dot
+t = Goal
+
+x = Player and Dotted
+
+=======
+LEVELS
+=======
+
+.......
+.xooot.
+.......
+
+o..o.o.
+ox.o.ot
+...o.o.
+.......
+
+"}) # note the extra empty line! ^
+
+	assert_int(len(parsed.levels)).is_equal(2)