Add python coverage 3.7 to depot tools.

third_party/coverage/xmlreport.py

Index: third_party/coverage/xmlreport.py
diff --git a/third_party/coverage/xmlreport.py b/third_party/coverage/xmlreport.py
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+"""XML reporting for coverage.py"""
+
+import os, sys, time
+import xml.dom.minidom
+
+from coverage import __url__, __version__
+from coverage.backward import sorted, rpartition    # pylint: disable=W0622
+from coverage.report import Reporter
+
+def rate(hit, num):
+    """Return the fraction of `hit`/`num`, as a string."""
+    return "%.4g" % (float(hit) / (num or 1.0))
+
+
+class XmlReporter(Reporter):
+    """A reporter for writing Cobertura-style XML coverage results."""
+
+    def __init__(self, coverage, config):
+        super(XmlReporter, self).__init__(coverage, config)
+
+        self.packages = None
+        self.xml_out = None
+        self.arcs = coverage.data.has_arcs()
+
+    def report(self, morfs, outfile=None):
+        """Generate a Cobertura-compatible XML report for `morfs`.
+
+        `morfs` is a list of modules or filenames.
+
+        `outfile` is a file object to write the XML to.
+
+        """
+        # Initial setup.
+        outfile = outfile or sys.stdout
+
+        # Create the DOM that will store the data.
+        impl = xml.dom.minidom.getDOMImplementation()
+        docType = impl.createDocumentType(
+            "coverage", None,
+            "http://cobertura.sourceforge.net/xml/coverage-03.dtd"
+            )
+        self.xml_out = impl.createDocument(None, "coverage", docType)
+
+        # Write header stuff.
+        xcoverage = self.xml_out.documentElement
+        xcoverage.setAttribute("version", __version__)
+        xcoverage.setAttribute("timestamp", str(int(time.time()*1000)))
+        xcoverage.appendChild(self.xml_out.createComment(
+            " Generated by coverage.py: %s " % __url__
+            ))
+        xpackages = self.xml_out.createElement("packages")
+        xcoverage.appendChild(xpackages)
+
+        # Call xml_file for each file in the data.
+        self.packages = {}
+        self.report_files(self.xml_file, morfs)
+
+        lnum_tot, lhits_tot = 0, 0
+        bnum_tot, bhits_tot = 0, 0
+
+        # Populate the XML DOM with the package info.
+        for pkg_name in sorted(self.packages.keys()):
+            pkg_data = self.packages[pkg_name]
+            class_elts, lhits, lnum, bhits, bnum = pkg_data
+            xpackage = self.xml_out.createElement("package")
+            xpackages.appendChild(xpackage)
+            xclasses = self.xml_out.createElement("classes")
+            xpackage.appendChild(xclasses)
+            for class_name in sorted(class_elts.keys()):
+                xclasses.appendChild(class_elts[class_name])
+            xpackage.setAttribute("name", pkg_name.replace(os.sep, '.'))
+            xpackage.setAttribute("line-rate", rate(lhits, lnum))
+            xpackage.setAttribute("branch-rate", rate(bhits, bnum))
+            xpackage.setAttribute("complexity", "0")
+
+            lnum_tot += lnum
+            lhits_tot += lhits
+            bnum_tot += bnum
+            bhits_tot += bhits
+
+        xcoverage.setAttribute("line-rate", rate(lhits_tot, lnum_tot))
+        xcoverage.setAttribute("branch-rate", rate(bhits_tot, bnum_tot))
+
+        # Use the DOM to write the output file.
+        outfile.write(self.xml_out.toprettyxml())
+
+        # Return the total percentage.
+        denom = lnum_tot + bnum_tot
+        if denom == 0:
+            pct = 0.0
+        else:
+            pct = 100.0 * (lhits_tot + bhits_tot) / denom
+        return pct
+
+    def xml_file(self, cu, analysis):
+        """Add to the XML report for a single file."""
+
+        # Create the 'lines' and 'package' XML elements, which
+        # are populated later.  Note that a package == a directory.
+        package_name = rpartition(cu.name, ".")[0]
+        className = cu.name
+
+        package = self.packages.setdefault(package_name, [{}, 0, 0, 0, 0])
+
+        xclass = self.xml_out.createElement("class")
+
+        xclass.appendChild(self.xml_out.createElement("methods"))
+
+        xlines = self.xml_out.createElement("lines")
+        xclass.appendChild(xlines)
+
+        xclass.setAttribute("name", className)
+        filename = cu.file_locator.relative_filename(cu.filename)
+        xclass.setAttribute("filename", filename.replace("\\", "/"))
+        xclass.setAttribute("complexity", "0")
+
+        branch_stats = analysis.branch_stats()
+
+        # For each statement, create an XML 'line' element.
+        for line in analysis.statements:
+            xline = self.xml_out.createElement("line")
+            xline.setAttribute("number", str(line))
+
+            # Q: can we get info about the number of times a statement is
+            # executed?  If so, that should be recorded here.
+            xline.setAttribute("hits", str(int(line not in analysis.missing)))
+
+            if self.arcs:
+                if line in branch_stats:
+                    total, taken = branch_stats[line]
+                    xline.setAttribute("branch", "true")
+                    xline.setAttribute("condition-coverage",
+                        "%d%% (%d/%d)" % (100*taken/total, taken, total)
+                        )
+            xlines.appendChild(xline)
+
+        class_lines = len(analysis.statements)
+        class_hits = class_lines - len(analysis.missing)
+
+        if self.arcs:
+            class_branches = sum([t for t,k in branch_stats.values()])
+            missing_branches = sum([t-k for t,k in branch_stats.values()])
+            class_br_hits = class_branches - missing_branches
+        else:
+            class_branches = 0.0
+            class_br_hits = 0.0
+
+        # Finalize the statistics that are collected in the XML DOM.
+        xclass.setAttribute("line-rate", rate(class_hits, class_lines))
+        xclass.setAttribute("branch-rate", rate(class_br_hits, class_branches))
+        package[0][className] = xclass
+        package[1] += class_hits
+        package[2] += class_lines
+        package[3] += class_br_hits
+        package[4] += class_branches