# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt

"""Tests for coverage.py's results analysis."""

import pytest

from coverage.results import Numbers, should_fail_under

from tests.coveragetest import CoverageTest


class NumbersTest(CoverageTest):
    """Tests for coverage.py's numeric measurement summaries."""

    run_in_temp_dir = False

    def test_basic(self):
        n1 = Numbers(n_files=1, n_statements=200, n_missing=20)
        self.assertEqual(n1.n_statements, 200)
        self.assertEqual(n1.n_executed, 180)
        self.assertEqual(n1.n_missing, 20)
        self.assertEqual(n1.pc_covered, 90)

    def test_addition(self):
        n1 = Numbers(n_files=1, n_statements=200, n_missing=20)
        n2 = Numbers(n_files=1, n_statements=10, n_missing=8)
        n3 = n1 + n2
        self.assertEqual(n3.n_files, 2)
        self.assertEqual(n3.n_statements, 210)
        self.assertEqual(n3.n_executed, 182)
        self.assertEqual(n3.n_missing, 28)
        self.assertAlmostEqual(n3.pc_covered, 86.666666666)

    def test_sum(self):
        n1 = Numbers(n_files=1, n_statements=200, n_missing=20)
        n2 = Numbers(n_files=1, n_statements=10, n_missing=8)
        n3 = sum([n1, n2])
        self.assertEqual(n3.n_files, 2)
        self.assertEqual(n3.n_statements, 210)
        self.assertEqual(n3.n_executed, 182)
        self.assertEqual(n3.n_missing, 28)
        self.assertAlmostEqual(n3.pc_covered, 86.666666666)

    def test_pc_covered_str(self):
        # Numbers._precision is a global, which is bad.
        Numbers.set_precision(0)
        n0 = Numbers(n_files=1, n_statements=1000, n_missing=0)
        n1 = Numbers(n_files=1, n_statements=1000, n_missing=1)
        n999 = Numbers(n_files=1, n_statements=1000, n_missing=999)
        n1000 = Numbers(n_files=1, n_statements=1000, n_missing=1000)
        self.assertEqual(n0.pc_covered_str, "100")
        self.assertEqual(n1.pc_covered_str, "99")
        self.assertEqual(n999.pc_covered_str, "1")
        self.assertEqual(n1000.pc_covered_str, "0")

    def test_pc_covered_str_precision(self):
        # Numbers._precision is a global, which is bad.
        Numbers.set_precision(1)
        n0 = Numbers(n_files=1, n_statements=10000, n_missing=0)
        n1 = Numbers(n_files=1, n_statements=10000, n_missing=1)
        n9999 = Numbers(n_files=1, n_statements=10000, n_missing=9999)
        n10000 = Numbers(n_files=1, n_statements=10000, n_missing=10000)
        self.assertEqual(n0.pc_covered_str, "100.0")
        self.assertEqual(n1.pc_covered_str, "99.9")
        self.assertEqual(n9999.pc_covered_str, "0.1")
        self.assertEqual(n10000.pc_covered_str, "0.0")
        Numbers.set_precision(0)

    def test_covered_ratio(self):
        n = Numbers(n_files=1, n_statements=200, n_missing=47)
        self.assertEqual(n.ratio_covered, (153, 200))

        n = Numbers(
            n_files=1, n_statements=200, n_missing=47,
            n_branches=10, n_missing_branches=3, n_partial_branches=1000,
        )
        self.assertEqual(n.ratio_covered, (160, 210))


@pytest.mark.parametrize("total, fail_under, result", [
    # fail_under==0 means anything is fine!
    (0, 0, False),
    (0.001, 0, False),
    # very small fail_under is possible to fail.
    (0.001, 0.01, True),
    # Rounding should work properly.
    (42.1, 42, False),
    (42.1, 43, True),
    (42.857, 42, False),
    (42.857, 43, False),
    (42.857, 44, True),
    # Values near 100 should only be treated as 100 if they are 100.
    (99.8, 100, True),
    (100.0, 100, False),
])
def test_should_fail_under(total, fail_under, result):
    assert should_fail_under(total, fail_under) == result