Merge pull request #385 from hashicorp/paultyng-patch-1

Add package docs for binary test driver

acctest/doc.go

@@ -0,0 +1,31 @@
+package acctest
+
+// Package acctest provides the ability to opt in to the new binary test driver. The binary
+// test driver allows you to run your acceptance tests with a binary of Terraform instead of
+// an emulated version packaged inside the SDK. This allows for a number of important
+// enhancements, but most notably a more realistic testing experience and matrix testing
+// against multiple versions of Terraform CLI. This also allows the SDK to be completely
+// separated, at a dependency level, from the Terraform CLI, as long as it is >= 0.12.0
+//
+// The new test driver must be enabled by initialising the test helper in your TestMain
+// function in all provider packages that run acceptance tests. Most providers have only
+// one package.
+//
+// In v2 of the SDK, the binary test driver will be mandatory.
+//
+// After importing this package, you can add code similar to the following:
+//
+//   func TestMain(m *testing.M) {
+//     acctest.UseBinaryDriver("provider_name", Provider)
+//     resource.TestMain(m)
+//   }
+// Where `Provider` is the function that returns the instance of a configured `terraform.ResourceProvider`
+// Some providers already have a TestMain defined, usually for the purpose of enabling test
+// sweepers. These additional occurrences should be removed.
+//
+// Initialising the binary test helper using UseBinaryDriver causes all tests to be run using
+// the new binary driver. Until SDK v2, the DisableBinaryDriver boolean property can be used
+// to use the legacy test driver for an individual TestCase.
+//
+// It is no longer necessary to import other Terraform providers as Go modules: these
+// imports should be removed.