Add a test to validate presence of all semconv files (#5106)

This tests validates that all files needed for the new model/semconv release are created .

model/semconv/semconv_test.go

@@ -0,0 +1,39 @@
+// Copyright The OpenTelemetry 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 semconv
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAllSemConvFilesAreCrated(t *testing.T) {
+	// Files that have to be present in each semconv package
+	var expectedFiles = []string{"nonstandard.go", "resource.go", "schema.go", "trace.go"}
+
+	files, err := os.ReadDir(".")
+	assert.NoError(t, err)
+	for _, f := range files {
+		if !f.IsDir() {
+			continue
+		}
+		for _, ef := range expectedFiles {
+			assert.FileExists(t, filepath.Join(".", f.Name(), ef))
+		}
+	}
+}