Refactor 4x4 board test to use pytest fixtures

- Update missing symoblic link to boggler src files to access wordlists

tests/boggler

@@ -1 +1 @@
-../src/boggler
+../boggler

tests/test_solve_4x4_board.py

@@ -5,15 +5,20 @@ from os import path
 import pytest
 from boggler.boggler_utils import BoggleBoard, build_full_boggle_tree
 
-wordlists_dir = path.abspath("./boggler/wordlists/dwyl/")
-letters = [
+WORDLISTS_DIR = path.abspath("./boggler/wordlists/dwyl/")
+
+@pytest.fixture
+def board_4x4():
+    return [
         ['u','n','r','e'],
         ['qu','n','i','l'],
         ['i','s','h','a'],
         ['s','e','l','b']
-]
+    ]
 
-expected_words_max_4 = [
+@pytest.fixture
+def expected_words_max_4():
+    return [
         "u", "un", "unn", "uns", "uni", "unie", "uni", "unie", "un", "unn", "uni",
         "unie", "n", "ni", "nis", "nisi", "nil", "nile", "nu", "nun", "nuns", "nr", "r",
         "rin", "rie", "riel", "risqu", "rise", "riss", "ria", "rial", "rial", "rin",
@@ -44,9 +49,11 @@ expected_words_max_4 = [
         "les", "less", "lei", "leis", "leis", "lehi", "les", "less", "lb", "b", "ba",
         "bal", "bale", "balr", "bali", "bai", "bain", "bais", "bain", "bail", "bal",
         "bals", "bale", "bah", "bhil", "bl", "bls", "blah"
-]
+    ]
 
-expected_words_max_20 = [
+@pytest.fixture
+def expected_words_max_20():
+    return [
         "u","un","unn","unrelinquishable","unrelishable","unreliable","unrein","uns",
         "unsin","unslain","unshale","unshale","uni","unie","unhale","unhair","unhale",
         "uni","unie","un","unn","uni","unie","unrelishable","unreliable",
@@ -102,33 +109,71 @@ expected_words_max_20 = [
         "bail","baile","bailer","bal","bals","bale","bales","balei","bales",
         "bah","bhil","bl","bls","blair","blain","blain","blains","blah",
         "blahs","bless","bless"
-]
+    ]
 
-# Init for word tree (4 letters or less)
-board_4 = BoggleBoard(letters, 4)
-tree_4 = build_full_boggle_tree(board_4, wordlists_dir)
-found_words_4 = list(chain.from_iterable([x.word_paths for x in tree_4.values()]))
+# -----------------------------------------------------
+# Solved board max 4-letter words
+# -----------------------------------------------------
 
-# Init for word tree (20 letters or less)
-board_20 = BoggleBoard(letters, 20)
-tree_20 = build_full_boggle_tree(board_20, wordlists_dir)
-found_words_20 = list(chain.from_iterable([x.word_paths for x in tree_20.values()]))
+# Init for word tree (4 board_4x4 or less) and fixtures
+@pytest.fixture
+def board_4(board_4x4):
+    return BoggleBoard(board_4x4, 4)
 
-def test_word_count_4_letters_max():
+@pytest.fixture
+def tree_4(board_4):
+    return build_full_boggle_tree(board_4, WORDLISTS_DIR)
+
+@pytest.fixture
+def found_words_4(tree_4):
+    return list(chain.from_iterable([x.word_paths for x in tree_4.values()]))
+
+# Tests for solved board with max of 4-letter words
+def test_word_count_4_board_4x4_max(expected_words_max_4, tree_4):
     assert len(expected_words_max_4) == sum(map(lambda x: len(x.word_paths), tree_4.values()))
 
-def test_words_full_4_letters_max():
+def test_words_full_4_board_4x4_max(expected_words_max_4, found_words_4, tree_4):
     found_words = [x.word_paths for x in tree_4.values()]
     for letter, subtree in tree_4.items():
         for i in range(0, min(len(expected_words_max_4), len(found_words_4))):
             assert expected_words_max_4[i] == found_words_4[i][0]
 
-def test_word_count_20_letters_max():
+def test_format_words_4_to_csv():
+    pass
+
+def test_format_words_4_to_json():
+    pass
+
+
+# -----------------------------------------------------
+# Solved board max 20-letter words
+# -----------------------------------------------------
+
+# Init for word tree (20 board_4x4 or less) and fixtures
+@pytest.fixture
+def board_20(board_4x4):
+    return BoggleBoard(board_4x4, 20)
+
+@pytest.fixture
+def tree_20(board_20):
+    return build_full_boggle_tree(board_20, WORDLISTS_DIR)
+
+@pytest.fixture
+def found_words_20(tree_20):
+    return list(chain.from_iterable([x.word_paths for x in tree_20.values()]))
+
+# Tests for solved board with max of 20-letter words
+def test_word_count_20_board_4x4_max(expected_words_max_20, tree_20):
     assert len(expected_words_max_20) == sum(map(lambda x: len(x.word_paths), tree_20.values()))
 
-def test_words_full_20_letters_max():
+def test_words_full_20_board_4x4_max(expected_words_max_20, found_words_20, tree_20):
     found_words = [x.word_paths for x in tree_20.values()]
     for letter, subtree in tree_20.items():
         for i in range(0, min(len(expected_words_max_20), len(found_words_20))):
             assert expected_words_max_20[i] == found_words_20[i][0]
 
+def test_format_words_20_to_csv():
+    pass
+
+def test_format_words_20_to_json():
+    pass