import math

from vocabulary import ArticleVocabularyLevel, UserVocabularyLevel


def test_article_level():
    ''' Boundary case test '''
    article = ArticleVocabularyLevel('')
    assert article.level == 0
    
def test_user_level():
    ''' Boundary case test '''
    user = UserVocabularyLevel({})
    assert user.level == 0
    
def test_article_level_3():
    ''' Normal case test '''
    article = ArticleVocabularyLevel('This is an interesting article that frequently uses the word "banana".')
    assert article.level == 3.090909090909091
    
def test_user_level_4():
    ''' Normal case test '''
    d = {'apple': ['BBC', 'CTE4'], 'banana': ['BBC', 'CTE4']}
    user = UserVocabularyLevel(d)
    assert user.level == 4.0
    
def test_article_level_5():
    ''' Abnormal case test '''
    article = ArticleVocabularyLevel('This is an interesting article that frequently uses the word "banana".')
    assert article.level != 5.0
    
def test_user_level_6():
    ''' Abnormal case test '''
    d = {'apple': ['BBC', 'CTE4'], 'banana': ['BBC', 'CTE4']}
    user = UserVocabularyLevel(d)
    assert user.level != 6.0