Support search operators for commits search (#6479)

* Support searching commits with prefix syntax

For now, support auther: committer:
When more than one prefix is supplied is presented, the result is the union.
When different prefixes are supplied, the result is the intersection.

For example,
"author:alice author:bob"
=> the result is all commits authored by Alice OR Bob

"hello committer:alice"
=> the result is all commits committed by Alice AND has the keyword
'hello' in the message.

Note that there should NOT have any space after the colon(:) of the prefix.
For example,
"author:bill" => correct
"author: bill" => wrong

* Remove unneeded logging

* Add missing files of test repository

* Add missing repo_unit entries to test fixtures

* Update test cases

* Add tooltip for commits search button

* Update tooltip text

I have no idea about how to format it with line breaks.

* Make the usage example more real

* Add a test case

* Add new options struct for SearchCommits

* Prefer len(s) > 0 over s != ""

* Add NewSearchCommitsOptions

1 files changed, 37 insertions, 0 deletions

diff --git a/integrations/repo_commits_search_test.go b/integrations/repo_commits_search_test.go
new file mode 100644
index 0000000000..f477550c0e
--- /dev/null
+++ b/integrations/repo_commits_search_test.go
@@ -0,0 +1,37 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package integrations
+
+import (
+	"net/http"
+	"net/url"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func testRepoCommitsSearch(t *testing.T, query, commit string) {
+	prepareTestEnv(t)
+
+	session := loginUser(t, "user2")
+
+	// Request repository commits page
+	req := NewRequestf(t, "GET", "/user2/commits_search_test/commits/branch/master/search?q=%s", url.QueryEscape(query))
+	resp := session.MakeRequest(t, req, http.StatusOK)
+
+	doc := NewHTMLParser(t, resp.Body)
+	sel := doc.doc.Find("#commits-table tbody tr td.sha a")
+	assert.EqualValues(t, commit, strings.TrimSpace(sel.Text()))
+}
+
+func TestRepoCommitsSearch(t *testing.T) {
+	testRepoCommitsSearch(t, "author:alice", "6e8eabd9a7")
+	testRepoCommitsSearch(t, "committer:Tom", "58e97d1a24")
+	testRepoCommitsSearch(t, "author:bob commit-4", "58e97d1a24")
+	testRepoCommitsSearch(t, "author:bob commit after:2019-03-03", "58e97d1a24")
+	testRepoCommitsSearch(t, "committer:alice commit before:2019-03-02", "6e8eabd9a7")
+	testRepoCommitsSearch(t, "committer:alice author:tom commit before:2019-03-04 after:2019-03-02", "0a8499a22a")
+}