Added unittest to check for specific repo files

UnitTest/RequiredFilesExistTest.cs

@@ -0,0 +1,90 @@
+namespace SendGrid.Tests
+{
+
+  public class TestRequiredFilesExist {
+
+      // ./Docker or docker/Docker
+      public void checkDockerExists() {
+          boolean dockerExists = File.Exists("./Docker") ||
+          File.Exists("./docker/Docker");
+          Assert.True(dockerExists);
+      }
+
+      // ./docker-compose.yml or ./docker/docker-compose.yml
+      public void checkDockerComposeExists() {
+          boolean dockerComposeExists = File.Exists("./docker-compose.yml") ||
+          File.Exists("./docker/docker-compose.yml");
+          Assert.True(dockerComposeExists);
+      }
+
+      // ./.env_sample
+      public void checkEnvSampleExists() {
+          Assert.True(File.Exists("./.env_sample"));
+      }
+
+      // ./.gitignore
+      public void checkGitIgnoreExists() {
+          Assert.True(File.Exists("./.gitignore"));
+      }
+
+      // ./.travis.yml
+      public void checkTravisExists() {
+          Assert.True(File.Exists("./.travis.yml"));
+      }
+
+      // ./.codeclimate.yml
+      public void checkCodeClimateExists() {
+          Assert.True(File.Exists("./.codeclimate.yml"));
+      }
+
+      // ./CHANGELOG.md
+      public void checkChangelogExists() {
+          Assert.True(File.Exists("./CHANGELOG.md"));
+      }
+
+      // ./CODE_OF_CONDUCT.md
+      public void checkCodeOfConductExists() {
+          Assert.True(File.Exists("./CODE_OF_CONDUCT.md"));
+      }
+
+      // ./CONTRIBUTING.md
+      public void checkContributingGuideExists() {
+          Assert.True(File.Exists("./CONTRIBUTING.md"));
+      }
+
+      // ./.github/ISSUE_TEMPLATE
+      public void checkIssuesTemplateExists() {
+          Assert.True(File.Exists("./.github/ISSUE_TEMPLATE"));
+      }
+
+      // ./LICENSE.md
+      public void checkLicenseExists() {
+          Assert.True(File.Exists("./LICENSE.md"));
+      }
+
+      // ./.github/PULL_REQUEST_TEMPLATE
+      public void checkPullRequestExists() {
+          Assert.True(File.Exists("./.github/PULL_REQUEST_TEMPLATE"));
+      }
+
+      // ./README.md
+      public void checkReadMeExists() {
+          Assert.True(File.Exists("./README.md"));
+      }
+
+      // ./TROUBLESHOOTING.md
+      public void checkTroubleShootingGuideExists() {
+          Assert.True(File.Exists("./TROUBLESHOOTING.md"));
+      }
+
+      // ./USAGE.md
+      public void checkUsageGuideExists() {
+          Assert.True(File.Exists("./USAGE.md"));
+      }
+
+      // ./USE_CASES.md
+      public void checkUseCases() {
+          Assert.True(File.Exists("./USE_CASES.md"));
+      }
+  }
+}