Add tests for db indexer in indexer_test.go (#27087)

As described in the title.
Some points: 
1. Why need those tests?
Because `buildIssueOverview` is not well tested, there are several
continuous bugs in the issue overview webpage.
2. Why in indexer_test.go?
It's hard to put those tests in `./modules/indexer/issue/db/db_test.go`
because those tests need 'real' data in db mocked by fixtures instead of
random data in `./modules/indexer/issue/internal/tests`. When using
'real' data(`unittest.PrepareTestDatabase`), `InitIssueIndexer` and the
package `init()` function of `indexer` are required to init indexer.
3. Why only db?
The other three indexer engines are well tested by random data and it's
okay to also test them with 'real' data in db mocked by fixtures. Any
follow-up PR is welcome.
4. Those tests are really basic, any more complicated tests are welcome.
5. I think it's also necessary to add tests in `TestAPISearchIssues`
in`api_test_issue.go` and `TestIssues` in `home_test.go`

modules/indexer/issues/indexer_test.go

@@ -5,14 +5,12 @@ package issues
 
 import (
 	"context"
-	"fmt"
-	"path"
 	"path/filepath"
 	"testing"
-	"time"
 
+	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/unittest"
-	"code.gitea.io/gitea/modules/indexer/issues/bleve"
+	"code.gitea.io/gitea/modules/indexer/issues/internal"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
 
@@ -29,186 +27,381 @@ func TestMain(m *testing.M) {
 	})
 }
 
-func TestBleveSearchIssues(t *testing.T) {
-	assert.NoError(t, unittest.PrepareTestDatabase())
-	setting.CfgProvider, _ = setting.NewConfigProviderFromData("")
-
-	tmpIndexerDir := t.TempDir()
-
-	setting.CfgProvider.Section("queue.issue_indexer").Key("DATADIR").MustString(path.Join(tmpIndexerDir, "issues.queue"))
-
-	oldIssuePath := setting.Indexer.IssuePath
-	setting.Indexer.IssuePath = path.Join(tmpIndexerDir, "issues.queue")
-	defer func() {
-		setting.Indexer.IssuePath = oldIssuePath
-	}()
-
-	setting.Indexer.IssueType = "bleve"
-	setting.LoadQueueSettings()
-	InitIssueIndexer(true)
-	defer func() {
-		if bleveIndexer, ok := (*globalIndexer.Load()).(*bleve.Indexer); ok {
-			bleveIndexer.Close()
-		}
-	}()
-
-	time.Sleep(5 * time.Second)
-
-	t.Run("issue2", func(t *testing.T) {
-		ids, _, err := SearchIssues(context.TODO(), &SearchOptions{
-			Keyword: "issue2",
-			RepoIDs: []int64{1},
-		})
-		assert.NoError(t, err)
-		assert.EqualValues(t, []int64{2}, ids)
-	})
-
-	t.Run("first", func(t *testing.T) {
-		ids, _, err := SearchIssues(context.TODO(), &SearchOptions{
-			Keyword: "first",
-			RepoIDs: []int64{1},
-		})
-		assert.NoError(t, err)
-		assert.EqualValues(t, []int64{1}, ids)
-	})
-
-	t.Run("for", func(t *testing.T) {
-		ids, _, err := SearchIssues(context.TODO(), &SearchOptions{
-			Keyword: "for",
-			RepoIDs: []int64{1},
-		})
-		assert.NoError(t, err)
-		assert.ElementsMatch(t, []int64{1, 2, 3, 5, 11}, ids)
-	})
-
-	t.Run("good", func(t *testing.T) {
-		ids, _, err := SearchIssues(context.TODO(), &SearchOptions{
-			Keyword: "good",
-			RepoIDs: []int64{1},
-		})
-		assert.NoError(t, err)
-		assert.EqualValues(t, []int64{1}, ids)
-	})
-}
-
-func TestDBSearchIssuesWithKeyword(t *testing.T) {
+func TestDBSearchIssues(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())
 
 	setting.Indexer.IssueType = "db"
 	InitIssueIndexer(true)
 
-	t.Run("issue2", func(t *testing.T) {
-		ids, _, err := SearchIssues(context.TODO(), &SearchOptions{
-			Keyword: "issue2",
-			RepoIDs: []int64{1},
-		})
-		assert.NoError(t, err)
-		assert.EqualValues(t, []int64{2}, ids)
-	})
-
-	t.Run("first", func(t *testing.T) {
-		ids, _, err := SearchIssues(context.TODO(), &SearchOptions{
-			Keyword: "first",
-			RepoIDs: []int64{1},
-		})
-		assert.NoError(t, err)
-		assert.EqualValues(t, []int64{1}, ids)
-	})
+	t.Run("search issues with keyword", searchIssueWithKeyword)
+	t.Run("search issues in repo", searchIssueInRepo)
+	t.Run("search issues by ID", searchIssueByID)
+	t.Run("search issues is pr", searchIssueIsPull)
+	t.Run("search issues is closed", searchIssueIsClosed)
+	t.Run("search issues by milestone", searchIssueByMilestoneID)
+	t.Run("search issues by label", searchIssueByLabelID)
+	t.Run("search issues by time", searchIssueByTime)
+	t.Run("search issues with order", searchIssueWithOrder)
+	t.Run("search issues in project", searchIssueInProject)
+	t.Run("search issues with paginator", searchIssueWithPaginator)
+}
 
-	t.Run("for", func(t *testing.T) {
-		ids, _, err := SearchIssues(context.TODO(), &SearchOptions{
-			Keyword: "for",
-			RepoIDs: []int64{1},
-		})
-		assert.NoError(t, err)
-		assert.ElementsMatch(t, []int64{1, 2, 3, 5, 11}, ids)
-	})
+func searchIssueWithKeyword(t *testing.T) {
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
+		{
+			SearchOptions{
+				Keyword: "issue2",
+				RepoIDs: []int64{1},
+			},
+			[]int64{2},
+		},
+		{
+			SearchOptions{
+				Keyword: "first",
+				RepoIDs: []int64{1},
+			},
+			[]int64{1},
+		},
+		{
+			SearchOptions{
+				Keyword: "for",
+				RepoIDs: []int64{1},
+			},
+			[]int64{11, 5, 3, 2, 1},
+		},
+		{
+			SearchOptions{
+				Keyword: "good",
+				RepoIDs: []int64{1},
+			},
+			[]int64{1},
+		},
+	}
 
-	t.Run("good", func(t *testing.T) {
-		ids, _, err := SearchIssues(context.TODO(), &SearchOptions{
-			Keyword: "good",
-			RepoIDs: []int64{1},
-		})
-		assert.NoError(t, err)
-		assert.EqualValues(t, []int64{1}, ids)
-	})
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
 }
 
-// TODO: add more tests
-func TestDBSearchIssueWithoutKeyword(t *testing.T) {
-	assert.NoError(t, unittest.PrepareTestDatabase())
+func searchIssueInRepo(t *testing.T) {
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
+		{
+			SearchOptions{
+				RepoIDs: []int64{1},
+			},
+			[]int64{11, 5, 3, 2, 1},
+		},
+		{
+			SearchOptions{
+				RepoIDs: []int64{2},
+			},
+			[]int64{7, 4},
+		},
+		{
+			SearchOptions{
+				RepoIDs: []int64{3},
+			},
+			[]int64{12, 6},
+		},
+		{
+			SearchOptions{
+				RepoIDs: []int64{4},
+			},
+			[]int64{},
+		},
+		{
+			SearchOptions{
+				RepoIDs: []int64{5},
+			},
+			[]int64{15},
+		},
+	}
 
-	setting.Indexer.IssueType = "db"
-	InitIssueIndexer(true)
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
 
+func searchIssueByID(t *testing.T) {
 	int64Pointer := func(x int64) *int64 {
 		return &x
 	}
-	for _, test := range []struct {
+	tests := []struct {
 		opts        SearchOptions
 		expectedIDs []int64
 	}{
 		{
 			SearchOptions{
-				RepoIDs: []int64{1},
+				PosterID: int64Pointer(1),
 			},
-			[]int64{11, 5, 3, 2, 1},
+			[]int64{11, 6, 3, 2, 1},
 		},
 		{
 			SearchOptions{
-				RepoIDs:    []int64{1},
 				AssigneeID: int64Pointer(1),
 			},
+			[]int64{6, 1},
+		},
+		{
+			SearchOptions{
+				MentionID: int64Pointer(4),
+			},
 			[]int64{1},
 		},
 		{
 			SearchOptions{
-				RepoIDs:  []int64{1},
-				PosterID: int64Pointer(1),
+				ReviewedID: int64Pointer(1),
+			},
+			[]int64{},
+		},
+		{
+			SearchOptions{
+				ReviewRequestedID: int64Pointer(1),
+			},
+			[]int64{12},
+		},
+		{
+			SearchOptions{
+				SubscriberID: int64Pointer(1),
+			},
+			[]int64{11, 6, 5, 3, 2, 1},
+		},
+	}
+
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
+
+func searchIssueIsPull(t *testing.T) {
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
+		{
+			SearchOptions{
+				IsPull: util.OptionalBoolFalse,
+			},
+			[]int64{17, 16, 15, 14, 13, 6, 5, 18, 10, 7, 4, 1},
+		},
+		{
+			SearchOptions{
+				IsPull: util.OptionalBoolTrue,
 			},
-			[]int64{11, 3, 2, 1},
+			[]int64{12, 11, 19, 9, 8, 3, 2},
 		},
+	}
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
+
+func searchIssueIsClosed(t *testing.T) {
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
 		{
 			SearchOptions{
-				RepoIDs:  []int64{1},
 				IsClosed: util.OptionalBoolFalse,
 			},
-			[]int64{11, 3, 2, 1},
+			[]int64{17, 16, 15, 14, 13, 12, 11, 6, 19, 18, 10, 7, 9, 8, 3, 2, 1},
 		},
 		{
 			SearchOptions{
-				RepoIDs:  []int64{1},
 				IsClosed: util.OptionalBoolTrue,
 			},
-			[]int64{5},
+			[]int64{5, 4},
+		},
+	}
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
+
+func searchIssueByMilestoneID(t *testing.T) {
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
+		{
+			SearchOptions{
+				MilestoneIDs: []int64{1},
+			},
+			[]int64{2},
 		},
 		{
 			SearchOptions{
-				RepoIDs: []int64{1},
+				MilestoneIDs: []int64{3},
 			},
-			[]int64{11, 5, 3, 2, 1},
+			[]int64{3},
+		},
+	}
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
+
+func searchIssueByLabelID(t *testing.T) {
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
+		{
+			SearchOptions{
+				IncludedLabelIDs: []int64{1},
+			},
+			[]int64{2, 1},
 		},
 		{
 			SearchOptions{
-				RepoIDs:    []int64{1},
-				AssigneeID: int64Pointer(1),
+				IncludedLabelIDs: []int64{4},
+			},
+			[]int64{2},
+		},
+		{
+			SearchOptions{
+				ExcludedLabelIDs: []int64{1},
+			},
+			[]int64{17, 16, 15, 14, 13, 12, 11, 6, 5, 19, 18, 10, 7, 4, 9, 8, 3},
+		},
+	}
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
+
+func searchIssueByTime(t *testing.T) {
+	int64Pointer := func(i int64) *int64 {
+		return &i
+	}
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
+		{
+			SearchOptions{
+				UpdatedAfterUnix: int64Pointer(0),
+			},
+			[]int64{17, 16, 15, 14, 13, 12, 11, 6, 5, 19, 18, 10, 7, 4, 9, 8, 3, 2, 1},
+		},
+	}
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
+
+func searchIssueWithOrder(t *testing.T) {
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
+		{
+			SearchOptions{
+				SortBy: internal.SortByCreatedAsc,
+			},
+			[]int64{1, 2, 3, 8, 9, 4, 7, 10, 18, 19, 5, 6, 11, 12, 13, 14, 15, 16, 17},
+		},
+	}
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
+
+func searchIssueInProject(t *testing.T) {
+	int64Pointer := func(i int64) *int64 {
+		return &i
+	}
+	tests := []struct {
+		opts        SearchOptions
+		expectedIDs []int64
+	}{
+		{
+			SearchOptions{
+				ProjectID: int64Pointer(1),
+			},
+			[]int64{5, 3, 2, 1},
+		},
+		{
+			SearchOptions{
+				ProjectBoardID: int64Pointer(1),
 			},
 			[]int64{1},
 		},
+	}
+	for _, test := range tests {
+		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+	}
+}
+
+func searchIssueWithPaginator(t *testing.T) {
+	tests := []struct {
+		opts          SearchOptions
+		expectedIDs   []int64
+		expectedTotal int64
+	}{
 		{
 			SearchOptions{
-				RepoIDs:  []int64{1},
-				PosterID: int64Pointer(1),
+				Paginator: &db.ListOptions{
+					PageSize: 5,
+				},
 			},
-			[]int64{11, 3, 2, 1},
+			[]int64{17, 16, 15, 14, 13},
+			19,
 		},
-	} {
-		t.Run(fmt.Sprintf("%#v", test.opts), func(t *testing.T) {
-			issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)
-			if !assert.NoError(t, err) {
-				return
-			}
-			assert.Equal(t, test.expectedIDs, issueIDs)
-		})
+	}
+	for _, test := range tests {
+		issueIDs, total, err := SearchIssues(context.TODO(), &test.opts)
+		if !assert.NoError(t, err) {
+			return
+		}
+		assert.Equal(t, test.expectedIDs, issueIDs)
+		assert.Equal(t, test.expectedTotal, total)
 	}
 }