Move api/apitest into the otel/oteltest package (#1241)

* Move the apitest package into oteltest

* Add documentation to exported func and type

* Add changes to CHANGELOG

* Update move in other modules

CHANGELOG.md

@@ -18,6 +18,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Move the `go.opentelemetry.io/otel/api/trace/tracetest` package into `go.opentelemetry.io/otel/oteltest`. (#1229)
 - OTLP Exporter supports OTLP v0.5.0. (#1230)
 - The Sampler is now called on local child spans. (#1233)
+- Move test harness from the `go.opentelemetry.io/otel/api/apitest` package into `go.opentelemetry.io/otel/oteltest`. (#1241)
 - Rename `MergeItererator` to `MergeIterator` in the `go.opentelemetry.io/otel/label` package. (#1244)
 
 ### Removed

api/apitest/harness.go → oteltest/harness.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package apitest
+package oteltest
 
 import (
 	"context"
@@ -26,16 +26,21 @@ import (
 	"go.opentelemetry.io/otel/label"
 )
 
+// Harness is a testing harness used to test implementations of the
+// OpenTelemetry API.
 type Harness struct {
 	t *testing.T
 }
 
+// NewHarness returns an instantiated *Harness using t.
 func NewHarness(t *testing.T) *Harness {
 	return &Harness{
 		t: t,
 	}
 }
 
+// TestTracer runs validation tests for an implementation of the OpenTelemetry
+// Tracer API.
 func (h *Harness) TestTracer(subjectFactory func() otel.Tracer) {
 	h.t.Run("#Start", func(t *testing.T) {
 		t.Run("propagates the original context", func(t *testing.T) {

oteltest/tracer_test.go

@@ -23,7 +23,6 @@ import (
 	"time"
 
 	"go.opentelemetry.io/otel"
-	"go.opentelemetry.io/otel/api/apitest"
 	"go.opentelemetry.io/otel/internal/matchers"
 	"go.opentelemetry.io/otel/label"
 	"go.opentelemetry.io/otel/oteltest"
@@ -32,7 +31,7 @@ import (
 func TestTracer(t *testing.T) {
 	tp := oteltest.NewTracerProvider()
 
-	apitest.NewHarness(t).TestTracer(func() func() otel.Tracer {
+	oteltest.NewHarness(t).TestTracer(func() func() otel.Tracer {
 		tp := oteltest.NewTracerProvider()
 		var i uint64
 		return func() otel.Tracer {

sdk/trace/trace_test.go

@@ -29,12 +29,12 @@ import (
 	"go.opentelemetry.io/otel/api/global"
 	"go.opentelemetry.io/otel/codes"
 	"go.opentelemetry.io/otel/label"
+	"go.opentelemetry.io/otel/oteltest"
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
-	"go.opentelemetry.io/otel/api/apitest"
 	ottest "go.opentelemetry.io/otel/internal/testing"
 	export "go.opentelemetry.io/otel/sdk/export/trace"
 	"go.opentelemetry.io/otel/sdk/instrumentation"
@@ -59,7 +59,7 @@ func init() {
 
 func TestTracerFollowsExpectedAPIBehaviour(t *testing.T) {
 	tp := NewTracerProvider(WithConfig(Config{DefaultSampler: TraceIDRatioBased(0)}))
-	harness := apitest.NewHarness(t)
+	harness := oteltest.NewHarness(t)
 	subjectFactory := func() otel.Tracer {
 		return tp.Tracer("")
 	}