chore: add tests for parser registration

Signed-off-by: Frederick F. Kautz IV <[email protected]>

pkg/metadatastorage/attestationcollection/parser_registry_test.go

@@ -0,0 +1,40 @@
+// Copyright 2024 The Archivista Contributors
+//
+// 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 attestationcollection
+
+import (
+	"context"
+	"encoding/json"
+	"testing"
+
+	"github.com/in-toto/archivista/ent"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRegister(t *testing.T) {
+	// Define a mock parser function
+	mockParser := func(ctx context.Context, tx *ent.Tx, attestation *ent.Attestation, attestationType string, message json.RawMessage) error {
+		return nil
+	}
+
+	// Register the mock parser
+	Register("mockType", mockParser)
+
+	// Check if the parser is registered
+	registeredParser, exists := registeredParsers["mockType"]
+	var typedParser AttestationParser = mockParser
+	assert.True(t, exists, "Parser should be registered")
+	assert.IsType(t, typedParser, registeredParser, "Registered parser should match the mock parser")
+}