#!/usr/bin/python3
# @u:file test_file_de_priorité.py

import pytest
from huffman.file_de_priorite import FileDePriorite, FileDePrioriteVideErreur, ElementNonComparableErreur
import copy

@pytest.fixture(scope="function")
def file_vide():
    return FileDePriorite()

@pytest.fixture(scope="function")
def file_non_vide():
    return FileDePriorite((2,1,4,3,5))

@pytest.fixture(scope="function")
def file_non_vide2():
    return FileDePriorite((2,1,4,3,5))

@pytest.mark.parametrize("file_d_p, resultat",
                         [("file_vide", True),
                          ("file_non_vide", False)
                        ])
def test_est_vide(file_d_p, resultat, request):
    assert request.getfixturevalue(file_d_p).est_vide == resultat

@pytest.mark.parametrize("file_d_p1, file_d_p2, resultat",
                         [("file_vide", "file_vide", True),
                          ("file_vide", "file_non_vide", False),
                          ("file_non_vide", "file_non_vide2", True)
                        ])    
def test_eq(file_d_p1, file_d_p2, resultat, request):
    file_d_p1 = request.getfixturevalue(file_d_p1)
    file_d_p2 = request.getfixturevalue(file_d_p2)
    assert (file_d_p1 == file_d_p2) == resultat

def test_enfiler_defiler_plus_prioritaire(file_non_vide, file_non_vide2):
    file_non_vide2.enfiler(0)
    file_non_vide2.defiler()
    assert file_non_vide2 == file_non_vide

def test_enfiler_defiler_non_prioritaire(file_non_vide, file_non_vide2):
    file_non_vide2.enfiler(4)
    file_non_vide2.defiler()
    assert file_non_vide2 == FileDePriorite((2,4,4,3,5))
    
def test_enfiler_element_plus_prioritaire(file_non_vide, file_non_vide2):
    file_non_vide2.enfiler(0)
    assert file_non_vide2.element == 0

@pytest.mark.parametrize("file_d_p",
                         [("file_vide"),
                          ("file_non_vide")
                        ])     
def test_repr(file_d_p, request):
    file_d_p = request.getfixturevalue(file_d_p)
    eval(repr(file_d_p)) == file_d_p

def test_vide_erreur(file_vide):
    with pytest.raises(FileDePrioriteVideErreur):
        file_vide.element
    
def test_non_comparable_erreur(file_non_vide):
    with pytest.raises(ElementNonComparableErreur):
        file_non_vide.enfiler("a")