[v12.0/forgejo] chore: use eventually for mysql collation test (#8518)

**Backport:** https://codeberg.org/forgejo/forgejo/pulls/8301

- Regression of removing `time.Sleep(5 * time.Second)` in forgejo/forgejo#7917.
- Ref: https://codeberg.org/forgejo/forgejo/issues/8221#issuecomment-5532035

Co-authored-by: Gusted <postmaster@gusted.xyz>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8518
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
Co-committed-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>

tests/integration/db_collation_test.go

@@ -7,6 +7,7 @@ package integration
 import (
 	"net/http"
 	"testing"
+	"time"
 
 	"forgejo.org/models/db"
 	"forgejo.org/modules/setting"
@@ -97,9 +98,13 @@ func TestDatabaseCollation(t *testing.T) {
 		defer test.MockVariableValue(&setting.Database.CharsetCollation, "utf8mb4_bin")()
 		require.NoError(t, db.ConvertDatabaseTable())
 
-		r, err := db.CheckCollations(x)
+		var r *db.CheckCollationsResult
-		require.NoError(t, err)
+		assert.Eventually(t, func() bool {
-		assert.Equal(t, "utf8mb4_bin", r.DatabaseCollation)
+			r, err = db.CheckCollations(x)
+			require.NoError(t, err)
+
+			return r.DatabaseCollation == "utf8mb4_bin"
+		}, time.Second*30, time.Second)
 		assert.True(t, r.CollationEquals(r.ExpectedCollation, r.DatabaseCollation))
 		assert.Empty(t, r.InconsistentCollationColumns)
 
@@ -117,9 +122,13 @@ func TestDatabaseCollation(t *testing.T) {
 		defer test.MockVariableValue(&setting.Database.CharsetCollation, "utf8mb4_general_ci")()
 		require.NoError(t, db.ConvertDatabaseTable())
 
-		r, err := db.CheckCollations(x)
+		var r *db.CheckCollationsResult
-		require.NoError(t, err)
+		assert.Eventually(t, func() bool {
-		assert.Equal(t, "utf8mb4_general_ci", r.DatabaseCollation)
+			r, err = db.CheckCollations(x)
+			require.NoError(t, err)
+
+			return r.DatabaseCollation == "utf8mb4_general_ci"
+		}, time.Second*30, time.Second)
 		assert.True(t, r.CollationEquals(r.ExpectedCollation, r.DatabaseCollation))
 		assert.Empty(t, r.InconsistentCollationColumns)
 
@@ -137,9 +146,15 @@ func TestDatabaseCollation(t *testing.T) {
 		defer test.MockVariableValue(&setting.Database.CharsetCollation, "")()
 		require.NoError(t, db.ConvertDatabaseTable())
 
+		var r *db.CheckCollationsResult
 		r, err := db.CheckCollations(x)
 		require.NoError(t, err)
-		assert.True(t, r.IsCollationCaseSensitive(r.DatabaseCollation))
+		assert.Eventually(t, func() bool {
+			r, err = db.CheckCollations(x)
+			require.NoError(t, err)
+
+			return r.IsCollationCaseSensitive(r.DatabaseCollation)
+		}, time.Second*30, time.Second)
 		assert.True(t, r.CollationEquals(r.ExpectedCollation, r.DatabaseCollation))
 		assert.Empty(t, r.InconsistentCollationColumns)
 	})