add instructions for writing and executing tests
add instructions for writing and executing tests

gjtorikian/asciidoctor,mjang/mj-asciidoc,glamouracademy/asciidoctor,anthonny/asciidoctor,yukisan/asciidoctor,benignbala/asciidoctor,pepijnve/asciidoctor,cesarmarinhorj/asciidoctor,benignbala/asciidoctor,mjang/mj-asciidoc,cuit-zhaxin/asciidoctor,neontapir/asciidoctor,cuit-zhaxin/asciidoctor,gjtorikian/asciidoctor,asciidocfx/asciidoctor,asciidocfx/asciidoctor,neontapir/asciidoctor,yukisan/asciidoctor,glamouracademy/asciidoctor,anthonny/asciidoctor,pepijnve/asciidoctor