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test_json.py
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test_json.py
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# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
"""Test json-based summary reporting for coverage.py"""
from datetime import datetime
import json
import os
import coverage
from tests.coveragetest import UsingModulesMixin, CoverageTest
class JsonReportTest(UsingModulesMixin, CoverageTest):
"""Tests of the JSON reports from coverage.py."""
def _assert_expected_json_report(self, cov, expected_result):
"""
Helper for tests that handles the common ceremony so the tests can be clearly show the
consequences of setting various arguments.
"""
self.make_file("a.py", """\
a = {'b': 1}
if a.get('a'):
b = 1
elif a.get('b'):
b = 2
else:
b = 3
if not a:
b = 4
""")
a = self.start_import_stop(cov, "a")
output_path = os.path.join(self.temp_dir, "a.json")
cov.json_report(a, outfile=output_path)
with open(output_path) as result_file:
parsed_result = json.load(result_file)
self.assert_recent_datetime(
datetime.strptime(parsed_result['meta']['timestamp'], "%Y-%m-%dT%H:%M:%S.%f")
)
del (parsed_result['meta']['timestamp'])
assert parsed_result == expected_result
def test_branch_coverage(self):
cov = coverage.Coverage(branch=True)
expected_result = {
'meta': {
"version": coverage.__version__,
"branch_coverage": True,
"show_contexts": False,
},
'files': {
'a.py': {
'executed_lines': [1, 2, 4, 5, 8],
'missing_lines': [3, 7, 9],
'excluded_lines': [],
'executed_branches': [
[2, 4],
[4, 5],
[8, 0],
],
'missing_branches': [
[2, 3],
[4, 7],
[8, 9],
],
'summary': {
'missing_lines': 3,
'covered_lines': 5,
'num_statements': 8,
'num_branches': 6,
'excluded_lines': 0,
'num_partial_branches': 3,
'covered_branches': 3,
'missing_branches': 3,
'percent_covered': 57.142857142857146,
'percent_covered_display': '57',
},
},
},
'totals': {
'missing_lines': 3,
'covered_lines': 5,
'num_statements': 8,
'num_branches': 6,
'excluded_lines': 0,
'num_partial_branches': 3,
'percent_covered': 57.142857142857146,
'percent_covered_display': '57',
'covered_branches': 3,
'missing_branches': 3,
},
}
self._assert_expected_json_report(cov, expected_result)
def test_simple_line_coverage(self):
cov = coverage.Coverage()
expected_result = {
'meta': {
"version": coverage.__version__,
"branch_coverage": False,
"show_contexts": False,
},
'files': {
'a.py': {
'executed_lines': [1, 2, 4, 5, 8],
'missing_lines': [3, 7, 9],
'excluded_lines': [],
'summary': {
'excluded_lines': 0,
'missing_lines': 3,
'covered_lines': 5,
'num_statements': 8,
'percent_covered': 62.5,
'percent_covered_display': '62',
},
},
},
'totals': {
'excluded_lines': 0,
'missing_lines': 3,
'covered_lines': 5,
'num_statements': 8,
'percent_covered': 62.5,
'percent_covered_display': '62',
},
}
self._assert_expected_json_report(cov, expected_result)
def run_context_test(self, relative_files):
"""A helper for two tests below."""
self.make_file("config", """\
[run]
relative_files = {}
[report]
precision = 2
[json]
show_contexts = True
""".format(relative_files))
cov = coverage.Coverage(context="cool_test", config_file="config")
expected_result = {
'meta': {
"version": coverage.__version__,
"branch_coverage": False,
"show_contexts": True,
},
'files': {
'a.py': {
'executed_lines': [1, 2, 4, 5, 8],
'missing_lines': [3, 7, 9],
'excluded_lines': [],
"contexts": {
"1": [
"cool_test"
],
"2": [
"cool_test"
],
"4": [
"cool_test"
],
"5": [
"cool_test"
],
"8": [
"cool_test"
],
},
'summary': {
'excluded_lines': 0,
'missing_lines': 3,
'covered_lines': 5,
'num_statements': 8,
'percent_covered': 62.5,
'percent_covered_display': '62.50',
},
},
},
'totals': {
'excluded_lines': 0,
'missing_lines': 3,
'covered_lines': 5,
'num_statements': 8,
'percent_covered': 62.5,
'percent_covered_display': '62.50',
},
}
self._assert_expected_json_report(cov, expected_result)
def test_context_non_relative(self):
self.run_context_test(relative_files=False)
def test_context_relative(self):
self.run_context_test(relative_files=True)