ci(filter): create initial chainsync tests

Signed-off-by: Chris Gianelloni <wolf31o2@blinklabs.io>

filter/chainsync/chainsync_test.go

@@ -0,0 +1,87 @@
+// Copyright 2025 Blink Labs Software
+//
+// 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 chainsync
+
+import "testing"
+
+// MockLogger is a mock implementation of the plugin.Logger interface
+type MockLogger struct{}
+
+func (l *MockLogger) Info(msg string, args ...interface{})    {}
+func (l *MockLogger) Error(msg string, args ...interface{})   {}
+func (l *MockLogger) Debug(msg string, args ...interface{})   {}
+func (l *MockLogger) Warn(msg string, args ...interface{})    {}
+func (l *MockLogger) Trace(msg string, args ...interface{})   {}
+
+func TestNewChainSync(t *testing.T) {
+    c := New()
+    if c == nil {
+        t.Fatalf("expected non-nil ChainSync instance")
+    }
+}
+
+func TestChainSync_Start(t *testing.T) {
+    c := New()
+    err := c.Start()
+    if err != nil {
+        t.Fatalf("expected no error, got %v", err)
+    }
+    // Additional checks can be added here
+}
+
+func TestChainSync_Stop(t *testing.T) {
+    c := New()
+    err := c.Stop()
+    if err != nil {
+        t.Fatalf("expected no error, got %v", err)
+    }
+    // Check if channels are closed
+    select {
+    case <-c.inputChan:
+    default:
+        t.Fatalf("expected inputChan to be closed")
+    }
+    select {
+    case <-c.outputChan:
+    default:
+        t.Fatalf("expected outputChan to be closed")
+    }
+    select {
+    case <-c.errorChan:
+    default:
+        t.Fatalf("expected errorChan to be closed")
+    }
+}
+
+func TestChainSync_ErrorChan(t *testing.T) {
+    c := New()
+    if c.ErrorChan() == nil {
+        t.Fatalf("expected non-nil errorChan")
+    }
+}
+
+func TestChainSync_InputChan(t *testing.T) {
+    c := New()
+    if c.InputChan() == nil {
+        t.Fatalf("expected non-nil inputChan")
+    }
+}
+
+func TestChainSync_OutputChan(t *testing.T) {
+    c := New()
+    if c.OutputChan() == nil {
+        t.Fatalf("expected non-nil outputChan")
+    }
+}