add license, fix test

internal/coreinternal/processor/filterlog/severity_matcher.go

@@ -1,3 +1,17 @@
+// 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:https://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 filterlog
 
 import (
@@ -20,7 +34,7 @@ func newSeverityNumberMatcher(minSeverity plog.SeverityNumber, matchUndefined bo
 }
 
 func (snm severityNumberMatcher) MatchLogRecord(lr plog.LogRecord, _ pcommon.Resource, _ pcommon.InstrumentationScope) bool {
- // We explicitly do not match UNDEFINED severity.
+ // behavior on SeverityNumberUNDEFINED is explicitly defined by matchUndefined
  if lr.SeverityNumber() == plog.SeverityNumberUNDEFINED {
  return snm.matchUndefined
  }

internal/coreinternal/processor/filterlog/severity_matcher_test.go

@@ -1,3 +1,17 @@
+// 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:https://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 filterlog
 
 import (
@@ -63,7 +77,7 @@ func TestSeverityMatcher_MatchLogRecord(t *testing.T) {
  minSeverity: plog.SeverityNumberUNDEFINED,
  matchUndefined: true,
  inputSeverity: plog.SeverityNumberUNDEFINED,
- matches: false,
+ matches: true,
  },
  }