Support advanced search syntax

lib/elasticsearch/git/repository.rb

@@ -417,10 +417,10 @@ module Elasticsearch
             query: {
               bool: {
                 must: [{
-                  multi_match: {
+                  simple_query_string: {
                     fields: fields,
                     query: query,
-                    operator: :or
+                    default_operator: :or
                   }
                 }]
               }
@@ -478,9 +478,9 @@ module Elasticsearch
             query: {
               bool: {
                 must: {
-                  multi_match: {
+                  simple_query_string: {
                     query: query,
-                    operator: :and,
+                    default_operator: :and,
                     fields: [ 'blob.content', 'blob.file_name' ]
                   }
                 }

spec/main_spec.rb

@@ -63,6 +63,13 @@ describe TestRepository do
     expect(found_version_file).to be_truthy
   end
+  it "supports advanced search syntax" do
+    repo.index_blobs
+    TestRepository.__elasticsearch__.refresh_index!
+
+    expect(repo.search('def +(popen | username_regex)')[:blobs][:total_count]).to eq(2)
+  end
+
   it "indexes specified commits" do
     repo.index_commits(
       from_rev: '40f4a7a617393735a95a0bb67b08385bc1e7c66d',