Merge pull request #85 from hugovk/add-3.7

Add support for Python 3.7

.travis.yml

@@ -1,18 +1,23 @@
 language: python
+cache: pip
 matrix:
   include:
-    - python: 2.7
-      env: TOXENV=py27
-    - python: 3.4
-      env: TOXENV=py34
-    - python: 3.5
-      env: TOXENV=py35
-    - python: 3.6
-      env: TOXENV=py36
-    - python: pypy
-      env: TOXENV=pypy
     - python: pypy3
       env: TOXENV=pypy3
+    - python: pypy
+      env: TOXENV=pypy
+    - python: 3.7
+      env: TOXENV=py37
+      dist: xenial
+      sudo: true
+    - python: 3.6
+      env: TOXENV=py36
+    - python: 3.5
+      env: TOXENV=py35
+    - python: 3.4
+      env: TOXENV=py34
+    - python: 2.7
+      env: TOXENV=py27
 install:
   - travis_retry pip install coveralls tox
 script:

diff_cover/diff_reporter.py

@@ -112,7 +112,7 @@ def __init__(self, compare_branch='origin/master', git_diff=None,
             options.append("unstaged")
 
         # Branch is always present, so use as basis for name
-        name = "{0}...HEAD".format(compare_branch)
+        name = "{}...HEAD".format(compare_branch)
         if len(options) > 0:
             # If more options are present separate them by comma's, except the last one
             for item in options[:-1]:
@@ -311,7 +311,7 @@ def _parse_source_sections(self, diff_str):
                         # We tolerate other information before we have
                         # a source file defined, unless it's a hunk line
                         if line.startswith("@@"):
-                            msg = "Hunk has no source file: '{0}'".format(line)
+                            msg = "Hunk has no source file: '{}'".format(line)
                             raise GitDiffError(msg)
 
         return source_dict
@@ -396,7 +396,7 @@ def _parse_source_line(self, line):
         elif '--cc' in line:
             regex = self.MERGE_CONFLICT_RE
         else:
-            msg = "Do not recognize format of source in line '{0}'".format(line)
+            msg = "Do not recognize format of source in line '{}'".format(line)
             raise GitDiffError(msg)
 
         # Parse for the source file path
@@ -406,7 +406,7 @@ def _parse_source_line(self, line):
             return groups[0]
 
         else:
-            msg = "Could not parse source path in line '{0}'".format(line)
+            msg = "Could not parse source path in line '{}'".format(line)
             raise GitDiffError(msg)
 
     def _parse_hunk_line(self, line):
@@ -443,15 +443,15 @@ def _parse_hunk_line(self, line):
                     return int(groups[0])
 
                 except ValueError:
-                    msg = "Could not parse '{0}' as a line number".format(groups[0])
+                    msg = "Could not parse '{}' as a line number".format(groups[0])
                     raise GitDiffError(msg)
 
             else:
-                msg = "Could not find start of hunk in line '{0}'".format(line)
+                msg = "Could not find start of hunk in line '{}'".format(line)
                 raise GitDiffError(msg)
 
         else:
-            msg = "Could not parse hunk in line '{0}'".format(line)
+            msg = "Could not parse hunk in line '{}'".format(line)
             raise GitDiffError(msg)
 
     @staticmethod

diff_cover/git_path.py

@@ -62,4 +62,4 @@ def _git_root(cls):
         """
         command = ['git', 'rev-parse', '--show-toplevel', '--encoding=utf-8']
         git_root = execute(command)[0]
-        return git_root.split('\n')[0] if git_root else u''
+        return git_root.split('\n')[0] if git_root else ''

diff_cover/report_generator.py

@@ -14,14 +14,14 @@ class DiffViolations(object):
     Class to capture violations generated by a particular diff
     """
     def __init__(self, violations, measured_lines, diff_lines):
-        self.lines = set(
+        self.lines = {
             violation.line for violation in violations
-        ).intersection(diff_lines)
+        }.intersection(diff_lines)
 
-        self.violations = set(
+        self.violations = {
             violation for violation in violations
             if violation.line in self.lines
-        )
+        }
 
         # By convention, a violation reporter
         # can return `None` to indicate that all lines are "measured"
@@ -80,8 +80,8 @@ def src_paths(self):
         Return a list of source files in the diff
         for which we have coverage information.
         """
-        return set(src for src, summary in self._diff_violations().items()
-                   if len(summary.measured_lines) > 0)
+        return {src for src, summary in self._diff_violations().items()
+                   if len(summary.measured_lines) > 0}
 
     def percent_covered(self, src_path):
         """
@@ -166,15 +166,14 @@ def _diff_violations(self):
         To make this efficient, we cache and reuse the result.
         """
         if not self._diff_violations_dict:
-            self._diff_violations_dict = dict(
-                (
-                    src_path, DiffViolations(
+            self._diff_violations_dict = {
+                    src_path: DiffViolations(
                         self._violations.violations(src_path),
                         self._violations.measured_lines(src_path),
                         self._diff.lines_changed(src_path),
                     )
-                ) for src_path in self._diff.src_paths_changed()
-            )
+                 for src_path in self._diff.src_paths_changed()
+            }
         return self._diff_violations_dict
 
 
@@ -256,9 +255,9 @@ def _context(self):
         """
 
         # Calculate the information to pass to the template
-        src_stats = dict(
-            (src, self._src_path_stats(src)) for src in self.src_paths()
-        )
+        src_stats = {
+            src: self._src_path_stats(src) for src in self.src_paths()
+        }
 
         # Include snippet style info if we're displaying
         # source code snippets

diff_cover/snippets.py

@@ -220,7 +220,7 @@ def _group_tokens(cls, token_stream, range_list):
         """
 
         # Create a map from ranges (start/end tuples) to tokens
-        token_map = dict((rng, []) for rng in range_list)
+        token_map = {rng: [] for rng in range_list}
 
         # Keep track of the current line number; we will
         # increment this as we encounter newlines in token values

diff_cover/tests/helpers.py

@@ -127,16 +127,16 @@ def _deleted_file_entries(deleted_files):
 
         for src_file in deleted_files:
             # File information
-            output.append('diff --git a/{0} b/{1}'.format(src_file, src_file))
+            output.append('diff --git a/{} b/{}'.format(src_file, src_file))
             output.append('index 629e8ad..91b8c0a 100644')
-            output.append('--- a/{0}'.format(src_file))
+            output.append('--- a/{}'.format(src_file))
             output.append('+++ b/dev/null')
 
             # Choose a random number of lines
             num_lines = random.randint(1, 30)
 
             # Hunk information
-            output.append('@@ -0,{0} +0,0 @@'.format(num_lines))
+            output.append('@@ -0,{} +0,0 @@'.format(num_lines))
             output.extend(['-' + _random_string() for _ in range(num_lines)])
 
     return output
@@ -155,14 +155,14 @@ def _source_file_entry(src_file, modified_lines):
     output = []
 
     # Line for the file names
-    output.append('diff --git a/{0} b/{1}'.format(src_file, src_file))
+    output.append('diff --git a/{} b/{}'.format(src_file, src_file))
 
     # Index line
     output.append('index 629e8ad..91b8c0a 100644')
 
     # Additions/deletions
-    output.append('--- a/{0}'.format(src_file))
-    output.append('+++ b/{0}'.format(src_file))
+    output.append('--- a/{}'.format(src_file))
+    output.append('+++ b/{}'.format(src_file))
 
     # Hunk information
     for (start, end) in _hunks(modified_lines):

diff_cover/tests/test_args.py

@@ -152,7 +152,7 @@ def test_parse_invalid_arg(self):
 
         for argv in invalid_argv:
             with self.assertRaises(SystemExit):
-                print("args = {0}".format(argv))
+                print("args = {}".format(argv))
                 parse_quality_args(argv)
 
     def test_parse_with_exclude(self):

diff_cover/tests/test_diff_reporter.py

@@ -377,11 +377,11 @@ def test_git_diff_error(self):
             # Expect that both methods that access git diff raise an error
             with self.assertRaises(GitDiffError):
                 print("src_paths_changed() "
-                      "should fail for {0}".format(diff_str))
+                      "should fail for {}".format(diff_str))
                 self.diff.src_paths_changed()
 
             with self.assertRaises(GitDiffError):
-                print("lines_changed() should fail for {0}".format(diff_str))
+                print("lines_changed() should fail for {}".format(diff_str))
                 self.diff.lines_changed('subdir/file1.py')
 
     def test_plus_sign_in_hunk_bug(self):

diff_cover/tests/test_integration.py

@@ -532,7 +532,7 @@ def _call_quality_expecting_error(self, tool_name, expected_error, report_arg='p
         with io.open('git_diff_add.txt', encoding='utf-8') as git_diff_file:
             self._set_git_diff_output(git_diff_file.read(), "")
         argv = ['diff-quality',
-                '--violations={0}'.format(tool_name),
+                '--violations={}'.format(tool_name),
                 report_arg]
 
         with patch('diff_cover.tool.LOGGER') as logger:

diff_cover/tests/test_java_violations_reporter.py

@@ -33,15 +33,15 @@ def _setup_patch(return_value, status_code=0):
 
 class CloverXmlCoverageReporterTest(unittest.TestCase):
 
-    MANY_VIOLATIONS = set([Violation(3, None), Violation(7, None),
-                           Violation(11, None), Violation(13, None)])
-    FEW_MEASURED = set([2, 3, 5, 7, 11, 13])
+    MANY_VIOLATIONS = {Violation(3, None), Violation(7, None),
+                           Violation(11, None), Violation(13, None)}
+    FEW_MEASURED = {2, 3, 5, 7, 11, 13}
 
-    FEW_VIOLATIONS = set([Violation(3, None), Violation(11, None)])
-    MANY_MEASURED = set([2, 3, 5, 7, 11, 13, 17])
+    FEW_VIOLATIONS = {Violation(3, None), Violation(11, None)}
+    MANY_MEASURED = {2, 3, 5, 7, 11, 13, 17}
 
-    ONE_VIOLATION = set([Violation(11, None)])
-    VERY_MANY_MEASURED = set([2, 3, 5, 7, 11, 13, 17, 23, 24, 25, 26, 26, 27])
+    ONE_VIOLATION = {Violation(11, None)}
+    VERY_MANY_MEASURED = {2, 3, 5, 7, 11, 13, 17, 23, 24, 25, 26, 26, 27}
 
     def setUp(self):
         # Paths generated by git_path are always the given argument
@@ -225,7 +225,7 @@ def test_no_such_file(self):
 
         # Expect that we get no results
         result = coverage.violations('file.java')
-        self.assertEqual(result, set([]))
+        self.assertEqual(result, set())
 
     def _coverage_xml(
             self,
@@ -251,7 +251,7 @@ def _coverage_xml(
         project = etree.SubElement(root, 'project')
         package = etree.SubElement(project, 'package')
 
-        violation_lines = set(violation.line for violation in violations)
+        violation_lines = {violation.line for violation in violations}
 
         for path in file_paths:
 
@@ -435,7 +435,7 @@ def test_quality_pregenerated_report(self):
         # When the user provides us with a pre-generated checkstyle report
         # then use that instead of calling checkstyle directly.
         checkstyle_reports = [
-            BytesIO(dedent(u"""
+            BytesIO(dedent("""
                 <?xml version="1.0" encoding="UTF-8"?>
                 <checkstyle version="8.0">
                     <file name="path/to/file.java">
@@ -450,7 +450,7 @@ def test_quality_pregenerated_report(self):
                 </checkstyle>
             """).strip().encode('utf-8')),
 
-            BytesIO(dedent(u"""
+            BytesIO(dedent("""
             <?xml version="1.0" encoding="UTF-8"?>
             <checkstyle version="8.0">
                 <file name="path/to/file.java">
@@ -468,9 +468,9 @@ def test_quality_pregenerated_report(self):
 
         # Expect that we get the right violations
         expected_violations = [
-            Violation(1, u'error: Missing docstring'),
-            Violation(57, u'warning: TODO the name of this method is a little bit confusing'),
-            Violation(183, u"error: Invalid name '' for type argument (should match [a-z_][a-z0-9_]{2,30}$)")
+            Violation(1, 'error: Missing docstring'),
+            Violation(57, 'warning: TODO the name of this method is a little bit confusing'),
+            Violation(183, "error: Invalid name '' for type argument (should match [a-z_][a-z0-9_]{2,30}$)")
         ]
 
         # We're not guaranteed that the violations are returned
@@ -515,7 +515,7 @@ def test_quality_pregenerated_report(self):
         # When the user provides us with a pre-generated findbugs report
         # then use that instead of calling findbugs directly.
         findbugs_reports = [
-            BytesIO(dedent(u"""
+            BytesIO(dedent("""
                 <?xml version="1.0" encoding="UTF-8"?>
                 <BugCollection sequence="0" release="" analysisTimestamp="1512755361404" version="3.0.1" timestamp="1512755226000">
                     <BugInstance instanceOccurrenceNum="0" instanceHash="1967bf8c4d25c6b964f30356014aa9fb" rank="20" abbrev="Dm" category="I18N" priority="3" type="DM_CONVERT_CASE" instanceOccurrenceMax="0">
@@ -541,7 +541,7 @@ def test_quality_pregenerated_report(self):
                 </BugCollection>
             """).strip().encode('utf-8')),
 
-            BytesIO(dedent(u"""
+            BytesIO(dedent("""
                 <?xml version="1.0" encoding="UTF-8"?>
                 <BugCollection sequence="0" release="" analysisTimestamp="1512755361404" version="3.0.1" timestamp="1512755226000">
                     <BugInstance instanceOccurrenceNum="0" instanceHash="1967bf8c4d25c6b964f30356014aa9fb" rank="20" abbrev="Dm" category="I18N" priority="3" type="DM_CONVERT_CASE" instanceOccurrenceMax="0">
@@ -568,7 +568,7 @@ def test_quality_pregenerated_report(self):
             """).strip().encode('utf-8')),
 
             # this is a violation which is not bounded to a specific line. We'll skip those
-            BytesIO(dedent(u"""
+            BytesIO(dedent("""
                 <?xml version="1.0" encoding="UTF-8"?>
                 <BugCollection sequence="0" release="" analysisTimestamp="1512755361404" version="3.0.1" timestamp="1512755226000">
                     <BugInstance instanceOccurrenceNum="0" instanceHash="2820338ec68e2e75a81848c95d31167f" rank="19" abbrev="Se" category="BAD_PRACTICE" priority="3" type="SE_BAD_FIELD" instanceOccurrenceMax="0">
@@ -587,8 +587,8 @@ def test_quality_pregenerated_report(self):
 
         # Expect that we get the right violations
         expected_violations = [
-            Violation(97, u'I18N: Consider using Locale parameterized version of invoked method'),
-            Violation(183, u'I18N: Consider using Locale parameterized version of invoked method')
+            Violation(97, 'I18N: Consider using Locale parameterized version of invoked method'),
+            Violation(183, 'I18N: Consider using Locale parameterized version of invoked method')
         ]
 
         # We're not guaranteed that the violations are returned

diff_cover/tests/test_report_generator.py

@@ -35,7 +35,7 @@ class BaseReportGeneratorTest(unittest.TestCase):
     """
 
     # Test data, returned by default from the mocks
-    SRC_PATHS = set(['file1.py', 'subdir/file2.py'])
+    SRC_PATHS = {'file1.py', 'subdir/file2.py'}
     LINES = [2, 3, 4, 5, 10, 11, 12, 13, 14, 15]
     VIOLATIONS = [Violation(n, None) for n in (10, 11, 20)]
     MEASURED = [1, 2, 3, 4, 7, 10, 11, 15, 20, 30]
@@ -47,7 +47,7 @@ class BaseReportGeneratorTest(unittest.TestCase):
     REPORT_GENERATOR_CLASS = None
 
     # Snippet returned by the mock
-    SNIPPET = u"<div>Snippet with \u1235 \u8292 unicode</div>"
+    SNIPPET = "<div>Snippet with \u1235 \u8292 unicode</div>"
     SNIPPET_STYLE = '.css { color:red }'
 
     def setUp(self):