@@ -0,0 +1,92 @@
+//  Copyright (c) 2016 Couchbase, Inc.
+//
+// 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 nixattr
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/blevesearch/bleve/v2/analysis"
+)
+
+func TestNixAttrFilter(t *testing.T) {
+
+	tests := []struct {
+		input  analysis.TokenStream
+		output analysis.TokenStream
+	}{
+		{
+			input:  tokenStream(""),
+			output: tokenStream(""),
+		},
+		{
+			input:  tokenStream("a"),
+			output: tokenStream("a"),
+		},
+
+		{
+			input:  tokenStream("linuxKernel.kernels.linux_6_15"),
+			output: tokenStream("linux", "Kernel", ".", "kernels", ".", "linux_6_15"),
+		},
+		{
+			input:  tokenStream("Lang"),
+			output: tokenStream("Lang"),
+		},
+		{
+			input:  tokenStream("GLang"),
+			output: tokenStream("G", "Lang"),
+		},
+		{
+			input:  tokenStream("GOLang"),
+			output: tokenStream("GO", "Lang"),
+		},
+		{
+			input:  tokenStream("GOOLang"),
+			output: tokenStream("GOO", "Lang"),
+		},
+		{
+			input:  tokenStream("1234"),
+			output: tokenStream("1234"),
+		},
+		{
+			input:  tokenStream("slartibartfast"),
+			output: tokenStream("slartibartfast"),
+		},
+	}
+
+	for _, test := range tests {
+		ccFilter := NewFilter()
+		actual := ccFilter.Filter(test.input)
+		if !reflect.DeepEqual(actual, test.output) {
+			t.Errorf("expected %s \n\n got %s", test.output, actual)
+		}
+	}
+}
+
+func tokenStream(termStrs ...string) analysis.TokenStream {
+	tokenStream := make([]*analysis.Token, len(termStrs))
+	index := 0
+	for i, termStr := range termStrs {
+		tokenStream[i] = &analysis.Token{
+			Term:     []byte(termStr),
+			Position: i + 1,
+			Start:    index,
+			End:      index + len(termStr),
+		}
+		index += len(termStr)
+	}
+
+	return analysis.TokenStream(tokenStream)
+}