Fix SemanticTextFieldMapperTests

Author: kderusso

x-pack/plugin/inference/src/main/java/org/elasticsearch/xpack/inference/mapper/SemanticTextFieldMapper.java

@@ -387,7 +387,7 @@ public InferenceFieldMetadata getMetadata(Set<String> sourcePaths) {
  String[] copyFields = sourcePaths.toArray(String[]::new);
  // ensure consistent order
  Arrays.sort(copyFields);
- return new InferenceFieldMetadata(fullPath(), fieldType().inferenceId, fieldType().searchInferenceId, copyFields);
+ return new InferenceFieldMetadata(fullPath(), fieldType().getInferenceId(), fieldType().getSearchInferenceId(), copyFields);
  }
 
  @Override
@@ -441,7 +441,7 @@ public SemanticTextFieldType(
  ) {
  super(name, true, false, false, TextSearchInfo.NONE, meta);
  this.inferenceId = inferenceId;
- this.searchInferenceId = searchInferenceId == null ? inferenceId : searchInferenceId;
+ this.searchInferenceId = searchInferenceId;
  ;
  this.modelSettings = modelSettings;
  this.inferenceField = inferenceField;
@@ -458,7 +458,7 @@ public String getInferenceId() {
  }
 
  public String getSearchInferenceId() {
- return searchInferenceId;
+ return searchInferenceId == null ? inferenceId : searchInferenceId;
  }
 
  public SemanticTextField.ModelSettings getModelSettings() {