eric7/Unittest/Interfaces/UnittestExecutor.py

# -*- coding: utf-8 -*-

# Copyright (c) 2022 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the executor for the standard 'unittest' framework.
"""

import contextlib
import json
import os
import re

from PyQt6.QtCore import pyqtSlot, QProcess

from EricNetwork.EricJsonStreamReader import EricJsonReader

from .UTExecutorBase import UTExecutorBase, UTTestResult, ResultCategory


class UnittestExecutor(UTExecutorBase):
    """
    Class implementing the executor for the standard 'unittest' framework.
    """
    module = "unittest"
    name = "unittest"
    
    runner = os.path.join(os.path.dirname(__file__), "UnittestRunner.py")
    
    def __init__(self, testWidget):
        """
        Constructor
        
        @param testWidget reference to the unit test widget
        @type UnittestWidget
        """
        super().__init__(testWidget)
        
        self.__statusCategoryMapping = {
            "failure": ResultCategory.FAIL,
            "error": ResultCategory.FAIL,
            "skipped": ResultCategory.SKIP,
            "expected failure": ResultCategory.OK,
            "unexpected success": ResultCategory.FAIL,
            "success": ResultCategory.OK,
        }
        
        self.__statusDisplayMapping = {
            "failure": self.tr("Failure"),
            "error": self.tr("Error"),
            "skipped": self.tr("Skipped"),
            "expected failure": self.tr("Expected Failure"),
            "unexpected success": self.tr("Unexpected Success"),
            "success": self.tr("Success"),
        }
    
    def getVersions(self, interpreter):
        """
        Public method to get the test framework version and version information
        of its installed plugins.
        
        @param interpreter interpreter to be used for the test
        @type str
        @return dictionary containing the framework name and version and the
            list of available plugins with name and version each
        @rtype dict
        """
        proc = QProcess()
        proc.start(interpreter, [UnittestExecutor.runner, "versions"])
        if proc.waitForFinished(3000):
            exitCode = proc.exitCode()
            if exitCode == 0:
                versionsStr = self.readAllOutput(proc)
                with contextlib.suppress(json.JSONDecodeError):
                    return json.loads(versionsStr)
        
        return {}
    
    def createArguments(self, config):
        """
        Public method to create the arguments needed to start the test process.
        
        @param config configuration for the test execution
        @type UTTestConfig
        @return list of process arguments
        @rtype list of str
        """
        args = [
            UnittestExecutor.runner,
            "runtest",
            self.reader.address(),
            str(self.reader.port()),
        ]
        
        if config.discover:
            args.extend([
                "discover",
                "--start-directory",
                config.discoveryStart,
            ])
        
        if config.failFast:
            args.append("--failfast")
        
        if config.collectCoverage:
            args.append("--cover")
            if config.eraseCoverage:
                args.append("--cover-erase")
        
        if config.testFilename and config.testName:
            args.append(config.testFilename)
            args.append(config.testName)
        
        return args
    
    def start(self, config, pythonpath):
        """
        Public method to start the testing process.
        
        @param config configuration for the test execution
        @type UTTestConfig
        @param pythonpath list of directories to be added to the Python path
        @type list of str
        """
        self.reader = EricJsonReader(name="Unittest Reader", parent=self)
        self.reader.dataReceived.connect(self.__processData)
        
        super().start(config, pythonpath)
    
    def finished(self):
        """
        Public method handling the unit test process been finished.
        
        This method should read the results (if necessary) and emit the signal
        testFinished.
        """
        self.reader.close()
        
        output = self.readAllOutput()
        self.testFinished.emit([], output)
    
    @pyqtSlot(object)
    def __processData(self, data):
        """
        Private slot to process the received data.
        
        @param data data object received
        @type dict
        """
        # error collecting tests
        if data["event"] == "collecterror":
            self.collectError.emit([("", data["error"])])
        
        # tests collected
        elif data["event"] == "collected":
            self.collected.emit([
                (t["id"], t["name"], t["description"]) for t in data["tests"]
            ])
        
        # test started
        elif data["event"] == "started":
            self.startTest.emit(
                (data["id"], data["name"], data["description"])
            )
        
        # test result
        elif data["event"] == "result":
            fn, ln = None, None
            tracebackLines = []
            if "traceback" in data:
                # get the error info
                tracebackLines = data["traceback"].splitlines()
                # find the last entry matching the pattern
                for index in range(len(tracebackLines) - 1, -1, -1):
                    fmatch = re.search(r'File "(.*?)", line (\d*?),.*',
                                       tracebackLines[index])
                    if fmatch:
                        break
                if fmatch:
                    fn, ln = fmatch.group(1, 2)
                
            if "shortmsg" in data:
                message = data["shortmsg"]
            elif tracebackLines:
                message = tracebackLines[-1].split(":", 1)[1].strip()
            else:
                message = ""
            
            self.testResult.emit(UTTestResult(
                category=self.__statusCategoryMapping[data["status"]],
                status=self.__statusDisplayMapping[data["status"]],
                name=data["name"],
                id=data["id"],
                description=data["description"],
                message=message,
                extra=tracebackLines,
                duration=(
                    data["duration_ms"] if "duration_ms" in data else None
                ),
                filename=fn,
                lineno=ln,
                subtestResult=data["subtest"] if "subtest" in data else False
            ))
        
        # test run finished
        elif data["event"] == "finished":
            self.testRunFinished.emit(data["tests"], data["duration_s"])
        
        # coverage data
        elif data["event"] == "coverage":
            self.coverageDataSaved.emit(data["file"])