1 files changed, 109 insertions, 0 deletions
diff --git a/internal/gitutil/tag_test.go b/internal/gitutil/tag_test.go
new file mode 100644
index 00000000..732eced6
--- /dev/null
+++ b/internal/gitutil/tag_test.go
@@ -0,0 +1,109 @@
+// Copyright 2020 The Gogs 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 gitutil
+
+import (
+	"testing"
+
+	"github.com/gogs/git-module"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestModuler_ListTagsAfter(t *testing.T) {
+	MockModule.RepoTags = func(string, ...git.TagsOptions) ([]string, error) {
+		return []string{
+			"v2.3.0", "v2.2.1", "v2.1.0",
+			"v1.3.0", "v1.2.0", "v1.1.0",
+			"v0.8.0", "v0.5.0", "v0.1.0",
+		}, nil
+	}
+	defer func() {
+		MockModule = MockModuleStore{}
+	}()
+
+	tests := []struct {
+		name        string
+		after       string
+		expTagsPage *TagsPage
+	}{
+		{
+			name: "first page",
+			expTagsPage: &TagsPage{
+				Tags: []string{
+					"v2.3.0", "v2.2.1", "v2.1.0",
+				},
+				HasLatest: true,
+				HasNext:   true,
+			},
+		},
+		{
+			name:  "second page",
+			after: "v2.1.0",
+			expTagsPage: &TagsPage{
+				Tags: []string{
+					"v1.3.0", "v1.2.0", "v1.1.0",
+				},
+				HasLatest: false,
+				HasNext:   true,
+			},
+		},
+		{
+			name:  "last page",
+			after: "v1.1.0",
+			expTagsPage: &TagsPage{
+				Tags: []string{
+					"v0.8.0", "v0.5.0", "v0.1.0",
+				},
+				HasLatest:     false,
+				PreviousAfter: "v2.1.0",
+				HasNext:       false,
+			},
+		},
+
+		{
+			name:  "arbitrary after",
+			after: "v1.2.0",
+			expTagsPage: &TagsPage{
+				Tags: []string{
+					"v1.1.0", "v0.8.0", "v0.5.0",
+				},
+				HasLatest:     false,
+				PreviousAfter: "v2.2.1",
+				HasNext:       true,
+			},
+		},
+		{
+			name:  "after the oldest one",
+			after: "v0.1.0",
+			expTagsPage: &TagsPage{
+				Tags:          []string{},
+				HasLatest:     false,
+				PreviousAfter: "v1.1.0",
+				HasNext:       false,
+			},
+		},
+		{
+			name:  "after does not exist",
+			after: "v2.2.9",
+			expTagsPage: &TagsPage{
+				Tags: []string{
+					"v2.3.0", "v2.2.1", "v2.1.0",
+				},
+				HasLatest: true,
+				HasNext:   true,
+			},
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			tagsPage, err := Module.ListTagsAfter("", test.after, 3)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			assert.Equal(t, test.expTagsPage, tagsPage)
+		})
+	}
+}