Move tracing to pkg/tracing

Signed-off-by: Derek McGowan <derek@mcg.dev>

pkg/tracing/plugin/otlp_test.go

@@ -0,0 +1,118 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package plugin
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/containerd/containerd/v2/pkg/errdefs"
+	"go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/sdk/trace/tracetest"
+)
+
+// TestNewExporter runs tests with different combinations of configuration for NewExporter function
+func TestNewExporter(t *testing.T) {
+
+	for _, testcase := range []struct {
+		name   string
+		input  OTLPConfig
+		output error
+	}{
+		{
+			name: "Test http/protobuf protocol, expect no error",
+			input: OTLPConfig{Endpoint: "http://localhost:4318",
+				Protocol: "http/protobuf",
+				Insecure: false},
+			output: nil,
+		},
+		{
+			name: "Test invalid endpoint, expect ErrInvalidArgument error",
+			input: OTLPConfig{Endpoint: "http://localhost\n:4318",
+				Protocol: "http/protobuf",
+				Insecure: false},
+			output: errdefs.ErrInvalidArgument,
+		},
+		{
+			name: "Test default protocol, expect no error",
+			input: OTLPConfig{Endpoint: "http://localhost:4318",
+				Protocol: "",
+				Insecure: false},
+			output: nil,
+		},
+		{
+			name: "Test grpc protocol, expect no error",
+			input: OTLPConfig{Endpoint: "http://localhost:4317",
+				Protocol: "grpc",
+				Insecure: false},
+			output: nil,
+		},
+		{
+			name: "Test http/json protocol which is not supported, expect not implemented error",
+			input: OTLPConfig{Endpoint: "http://localhost:4318",
+				Protocol: "http/json",
+				Insecure: false},
+			output: errdefs.ErrNotImplemented,
+		},
+	} {
+		testcase := testcase
+		t.Run(testcase.name, func(t *testing.T) {
+			t.Logf("input: %v", testcase.input)
+
+			ctx := context.TODO()
+			exp, err := newExporter(ctx, &testcase.input)
+			t.Logf("output: %v", err)
+
+			if err == nil {
+				if err != testcase.output {
+					t.Fatalf("Expect to get error: %v, however no error got\n", testcase.output)
+				} else if exp == nil {
+					t.Fatalf("Something went wrong, Exporter not created as expected\n")
+				}
+			} else {
+				if !errors.Is(err, testcase.output) {
+					t.Fatalf("Expect to get error: %v, however error %v returned\n", testcase.output, err)
+				}
+			}
+
+		})
+	}
+}
+
+// TestNewTracer runs test for NewTracer function
+func TestNewTracer(t *testing.T) {
+
+	config := &TraceConfig{ServiceName: "containerd", TraceSamplingRatio: 1.0}
+	t.Logf("config: %v", config)
+
+	procs := make([]trace.SpanProcessor, 0, 1)
+
+	//Create a dummy in memory exporter for test
+	exp := tracetest.NewInMemoryExporter()
+	proc := trace.NewBatchSpanProcessor(exp)
+
+	procs = append(procs, proc)
+
+	ctx := context.TODO()
+	tracerCloser, err := newTracer(ctx, config, procs)
+	if err != nil {
+		t.Fatalf("Something went wrong, Tracer not created as expected\n")
+	}
+
+	defer tracerCloser.Close()
+}