Add integration test

Author: jborean93

test/coverlet.integration.tests/DotnetTool.cs

@@ -120,5 +120,28 @@ public void StandAloneThresholdLineAndMethod()
       Assert.Contains("The minimum line coverage is below the specified 80", standardOutput);
       Assert.Contains("The minimum method coverage is below the specified 80", standardOutput);
     }
+
+    [Fact]
+    public void StandAlonePathMapping()
+    {
+      using ClonedTemplateProject clonedTemplateProject = CloneTemplateProject();
+      UpdateNugeConfigtWithLocalPackageFolder(clonedTemplateProject.ProjectRootPath!);
+      string coverletToolCommandPath = InstallTool(clonedTemplateProject.ProjectRootPath!);
+      DotnetCli($"build {clonedTemplateProject.ProjectRootPath} /p:ContinuousIntegrationBuild=true", out string standardOutput, out string standardError);
+      string publishedTestFile = clonedTemplateProject.GetFiles("*" + ClonedTemplateProject.AssemblyName + ".dll").Single(f => !f.Contains("obj") && !f.Contains("ref"));
+
+      string mappingFile = Path.Combine(clonedTemplateProject.ProjectRootPath, "CoverletMapping.txt");
+      File.WriteAllLines(mappingFile, new string[]
+      {
+        $"|{clonedTemplateProject.ProjectRootPath}{Path.DirectorySeparatorChar}=/_/"
+      });
+      RunCommand(coverletToolCommandPath, $"\"{publishedTestFile}\" --target \"dotnet\" --targetargs \"test {Path.Combine(clonedTemplateProject.ProjectRootPath, ClonedTemplateProject.ProjectFileName)} --no-build\"  --include-test-assembly --output \"{clonedTemplateProject.ProjectRootPath}\"{Path.DirectorySeparatorChar} --use-mapping-file \"{mappingFile}\"", out standardOutput, out standardError);
+      if (!string.IsNullOrEmpty(standardError))
+      {
+        _output.WriteLine(standardError);
+      }
+      Assert.Contains("Passed!", standardOutput);
+      AssertCoverage(clonedTemplateProject, standardOutput: standardOutput);
+    }
   }
 }