Initial commit

tests/test_json.py

@@ -0,0 +1,54 @@
+import pytest
+import json_py
+import json_py.lexer as lexer
+import json_py.parser as parser
+
+
+def test_parser():
+    expected = {"hello": ["world", "!", 69], 3: 9.1}
+    assert json_py.from_json('{"hello": ["world", "!", 69], 3: 9.1}') == expected
+    assert json_py.from_json('{"friends": null}') == {"friends": None}
+
+
+def test_lex_string():
+    assert lexer.lex_string('"hello"') == ("hello", "")
+
+
+def test_lex_number():
+    assert lexer.lex_number("1349") == (1349, "")
+    assert lexer.lex_number("6.9") == (6.9, "")
+    with pytest.raises(ValueError):
+        lexer.lex_number("6..9")
+
+
+def test_lex_bool():
+    assert lexer.lex_bool("True") == (True, "")
+    assert lexer.lex_bool("False") == (False, "")
+    assert lexer.lex_bool("Sample") == (None, "Sample")
+
+
+def test_lex_null():
+    assert lexer.lex_null("null") == (True, "")
+
+
+def test_lex_object():
+    assert lexer.lex("{12: 2, 3: 4}") == ["{", 12, ":", 2, ",", 3, ":", 4, "}"]
+
+
+def test_parse_array():
+    # Skip first token 'cos parser consumes it.
+    assert parser.parse_array([12, ",", 2, "]"]) == ([12, 2], [])
+    assert parser.parse_array(["]"]) == ([], [])
+    with pytest.raises(ValueError):
+        parser.parse_array([12, "," "]"])
+    with pytest.raises(ValueError):
+        parser.parse_array([12, 3, "]"])
+    with pytest.raises(ValueError):
+        parser.parse_array([12, ",", 3])
+
+
+def test_parse_object():
+    # Skip first token 'cos parser consumes it.
+    assert parser.parse_object(["}"]) == ({}, [])
+    assert parser.parse_object(["age", ":", 21, "}"]) == ({"age": 21}, [])
+    assert parser.parse_object(["12", ":", "[", 1, "]", "}"]) == ({"12": [1]}, [])