test: run integration tests on random ports and speed up slow tests (#39842)

Integration test processes now get their own work directory, config file
and random ports, so several runs can execute in parallel on one
machine. The slowest tests also lose fixed sleeps and needlessly
expensive setup, with their assertions kept.

- Batch PostgreSQL sequence resets, the main per-test fixture cost there
- Cheap hashing params in hash and OAuth2 fixture tests, full-cost
vectors stay
- Single fetch for negative Actions runner assertions instead of 1s
polls
- Queue flushes and backdated timestamps instead of sleeps
- In-memory SQLite test journal, tmpfs for PostgreSQL in CI
- E2E instance writes SSH keys into its work directory instead of
`~/.ssh/authorized_keys`

routers/web/admin/users_test.go

@@ -18,7 +18,7 @@ import (
 )
 
 func TestNewUserPost_MustChangePassword(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "admin/users/new")
 
 	u := unittest.AssertExistsAndLoadBean(t, &user_model.User{
@@ -55,7 +55,7 @@ func TestNewUserPost_MustChangePassword(t *testing.T) {
 }
 
 func TestNewUserPost_MustChangePasswordFalse(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "admin/users/new")
 
 	u := unittest.AssertExistsAndLoadBean(t, &user_model.User{
@@ -92,7 +92,7 @@ func TestNewUserPost_MustChangePasswordFalse(t *testing.T) {
 }
 
 func TestNewUserPost_InvalidEmail(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "admin/users/new")
 
 	u := unittest.AssertExistsAndLoadBean(t, &user_model.User{
@@ -122,7 +122,7 @@ func TestNewUserPost_InvalidEmail(t *testing.T) {
 }
 
 func TestNewUserPost_VisibilityDefaultPublic(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "admin/users/new")
 
 	u := unittest.AssertExistsAndLoadBean(t, &user_model.User{
@@ -160,7 +160,7 @@ func TestNewUserPost_VisibilityDefaultPublic(t *testing.T) {
 }
 
 func TestNewUserPost_VisibilityPrivate(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "admin/users/new")
 
 	u := unittest.AssertExistsAndLoadBean(t, &user_model.User{

routers/web/repo/issue_label_test.go

@@ -23,7 +23,7 @@ import (
 )
 
 func TestIssueLabel(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	t.Run("RetrieveLabels", testRetrieveLabels)
 	t.Run("NewLabel", testNewLabel)
 	t.Run("NewLabelInvalidColor", testNewLabelInvalidColor)
@@ -199,7 +199,7 @@ func testUpdateIssueLabelToggle(t *testing.T) {
 		{"toggle", []int64{1, 3}, 1, false},
 		{"toggle", []int64{1, 2}, 2, true},
 	} {
-		unittest.PrepareTestEnv(t)
+		assert.NoError(t, unittest.PrepareTestDatabase())
 		ctx, _ := contexttest.MockContext(t, "user2/repo1/issues/labels")
 		contexttest.LoadUser(t, ctx, 2)
 		contexttest.LoadRepo(t, ctx, 1)

routers/web/repo/issue_page_meta_test.go

@@ -23,7 +23,7 @@ import (
 )
 
 func TestRetrieveRepoIssueMetaDataWithPrefill(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	require.NoError(t, unittest.PrepareTestDatabase())
 	require.NoError(t, db.Insert(t.Context(),
 		[]*issues_model.Label{
 			{ID: 100, RepoID: 1, Name: "Bug"},

routers/web/repo/middlewares_test.go

@@ -14,7 +14,7 @@ import (
 )
 
 func TestDiffViewStyle(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 
 	t.Run("AnonymousUser", func(t *testing.T) {
 		ctx, _ := contexttest.MockContext(t, "/any")

routers/web/repo/setting/settings_test.go

@@ -30,7 +30,7 @@ import (
 )
 
 func TestAddDeployKey(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	t.Run("ReadOnly", func(t *testing.T) {
 		const testKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICV0MGX/W9IvLA4FXpIuUcdDcbj5KX4syHgsTy7soVgf\n"
 		ctx, _ := contexttest.MockContext(t, "POST /user2/repo1/settings/keys")
@@ -52,7 +52,7 @@ func TestAddDeployKey(t *testing.T) {
 }
 
 func TestCollaborationPost(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "user2/repo1/issues/labels")
 	contexttest.LoadUser(t, ctx, 2)
 	contexttest.LoadUser(t, ctx, 4)
@@ -87,7 +87,7 @@ func TestCollaborationPost(t *testing.T) {
 }
 
 func TestCollaborationPost_InactiveUser(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "user2/repo1/issues/labels")
 	contexttest.LoadUser(t, ctx, 2)
 	contexttest.LoadUser(t, ctx, 9)
@@ -110,7 +110,7 @@ func TestCollaborationPost_InactiveUser(t *testing.T) {
 }
 
 func TestCollaborationPost_AddCollaboratorTwice(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "user2/repo1/issues/labels")
 	contexttest.LoadUser(t, ctx, 2)
 	contexttest.LoadUser(t, ctx, 4)
@@ -151,7 +151,7 @@ func TestCollaborationPost_AddCollaboratorTwice(t *testing.T) {
 }
 
 func TestCollaborationPost_NonExistentUser(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "user2/repo1/issues/labels")
 	contexttest.LoadUser(t, ctx, 2)
 	contexttest.LoadRepo(t, ctx, 1)
@@ -173,7 +173,7 @@ func TestCollaborationPost_NonExistentUser(t *testing.T) {
 }
 
 func TestAddTeamPost(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	org := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 26})
 	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 43})
 	team := unittest.AssertExistsAndLoadBean(t, &organization.Team{ID: 11})
@@ -219,7 +219,7 @@ func TestAddTeamPost(t *testing.T) {
 }
 
 func TestDeleteTeam(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 	ctx, _ := contexttest.MockContext(t, "org3/team1/repo3")
 
 	ctx.Req.Form.Set("id", "2")

routers/web/repo/view_home_test.go

@@ -15,7 +15,7 @@ import (
 )
 
 func TestViewHomeSubmoduleRedirect(t *testing.T) {
-	unittest.PrepareTestEnv(t)
+	assert.NoError(t, unittest.PrepareTestDatabase())
 
 	ctx, _ := contexttest.MockContext(t, "/user2/repo1/src/branch/master/test-submodule")
 	submodule := git_module.NewCommitSubmoduleFile("/user2/repo1", "test-submodule", "../repo-other", "any-ref-id")