updating READMD.md

README.md

@@ -1,6 +1,6 @@
 # drone-with-go [![Build Status](http://beta.drone.io/api/badges/drone-demos/drone-with-go/status.svg)](http://beta.drone.io/drone-demos/drone-with-go) [![Build Status](https://aircover.co/badges/drone-demos/drone-with-go/coverage.svg)](https://aircover.co/drone-demos/drone-with-go)
 
-An example of how to test Go code.
+An example of how to test Go code with Drone.
 
 # Basic Testing
 To run basic CI tests use the following in your `.drone.yml` file.
@@ -12,11 +12,15 @@ build:
     - go test ./...
 ```
 
+In this config `image: golang:1.5.3` references the official Golang Docker image hosted on the Docker Hub registry at https://hub.docker.com/r/_/golang/.
+Go tests are execute with the `go test ./...` command.
+
 # Advanced Testing
+
+## Environment Variables
 Using environment variables to configure Go testing is easy.
 Configure environment variables by setting the `build` section's `environment`.
 
-`.drone.yml`:
 ```yaml
 build:
   image: golang:1.5.3
@@ -29,10 +33,33 @@ build:
     - go test ./...
 ```
 
-Below is a more advanced `.drone.yml` for notification integrations like HipChat.
+## Coverage
+Drone tests work best with the coverage plugin and the [aircover.co](https://aircover.co) service.
+We only want to send a coverage report when all tests pass, so the coverage plugin uses `publish`.
+Also, we should specify a particular branch so that coverage reports are consistent.
 
 ```yaml
+build:
+  image: golang:1.5.3
+  environment:
+    - GO15VENDOREXPERIMENT=1
+    - GOOS=linux
+    - GOARCH=amd64
+    - CGO_ENABLED=0
+  commands:
+    - go test -cover -coverprofile coverage.out
+
+publish:
+  coverage:
+    when:
+      branch: master
+```
 
+## Plugins
+Notification plugins use `notify` for integrations like HipChat.
+You can find a list of plugins at [readme.drone.io/plugins](http://readme.drone.io/plugins/).
+
+```yaml
 build:
   image: golang:1.5.3
   environment:
@@ -40,9 +67,13 @@ build:
     - GOOS=linux
     - GOARCH=amd64
     - CGO_ENABLED=0
-    - COVERALLS_TOKEN=$$COVERALLS_TOKEN
   commands:
-    - go test -cover ./...
+    - go test -cover -coverprofile coverage.out
+
+publish:
+  coverage:
+    when:
+      branch: master
 
 notify:
   hipchat:

main_test.go

@@ -1,6 +1,13 @@
 package main
 
-import "testing"
+import (
+	"os"
+	"testing"
+)
+
+func TestMain(m *testing.M) {
+	os.Exit(m.Run())
+}
 
 func TestHelloWorld(t *testing.T) {
 	if HelloWorld() != "hello world" {