Add test coverage via coveralls

.travis.yml

@@ -1,16 +1,20 @@
-language: csharp
-
-sudo: false
-
-solution: byndercsharpsdk.sln
-
 install:
-  - nuget restore byndercsharpsdk.sln
-  - nuget install NUnit.Runners -Version 3.8.0 -OutputDirectory testrunner
+  - docker --version
 
 script:
-  - msbuild /p:Configuration=Release byndercsharpsdk.sln
-  - mono ./testrunner/NUnit.ConsoleRunner.3.8.0/tools/nunit3-console.exe ./Bynder/Test/bin/Release/net461/Bynder.Test.dll
+  - docker build
+    --build-arg CI=$CI
+    --build-arg TRAVIS=$TRAVIS
+    --build-arg TRAVIS_BRANCH=$TRAVIS_BRANCH
+    --build-arg TRAVIS_COMMIT=$TRAVIS_COMMIT
+    --build-arg TRAVIS_JOB_ID=$TRAVIS_JOB_ID
+    --build-arg TRAVIS_JOB_NUMBER=$TRAVIS_JOB_NUMBER
+    --build-arg TRAVIS_OS_NAME=$TRAVIS_OS_NAME
+    --build-arg TRAVIS_PULL_REQUEST=$TRAVIS_PULL_REQUEST
+    --build-arg TRAVIS_PULL_REQUEST_SHA=$TRAVIS_PULL_REQUEST_SHA
+    --build-arg TRAVIS_REPO_SLUG=$TRAVIS_REPO_SLUG
+    --build-arg TRAVIS_TAG=$TRAVIS_TAG
+    .
 
 notifications:
   email:

Dockerfile

@@ -0,0 +1,31 @@
+FROM microsoft/dotnet:2.2-sdk-alpine
+
+ARG CI
+ARG TRAVIS
+ARG TRAVIS_BRANCH
+ARG TRAVIS_COMMIT
+ARG TRAVIS_JOB_ID
+ARG TRAVIS_JOB_NUMBER
+ARG TRAVIS_OS_NAME
+ARG TRAVIS_PULL_REQUEST
+ARG TRAVIS_PULL_REQUEST_SHA
+ARG TRAVIS_REPO_SLUG
+ARG TRAVIS_TAG
+
+ARG SKIP_TEST
+ARG SKIP_COVERALLS
+
+ENV PATH="${PATH}:/root/.dotnet/tools"
+
+WORKDIR /app
+ADD . /app
+
+# test
+RUN if [ -z "$SKIP_TEST" ]; then \
+  cd /app/Bynder/Test/ && dotnet test /p:CollectCoverage=true /p:CoverletOutputFormat=opencover && cd /app; \
+  else echo "skip test"; fi
+
+# submit coverage to coverals if COVERALLS_TOKEN in env
+RUN if [ -z "$SKIP_COVERALLS" ] && [ -z "$SKIP_TEST" ]; then \
+  dotnet tool install -g coveralls.net && csmacnz.Coveralls --opencover -i /app/Bynder/Test/coverage.opencover.xml --useRelativePaths || echo "coverall failed!"; \
+  else echo "skip coveralls"; fi