Function TestExtraneous

coderd/prebuilds/preset_snapshot_test.go:543–589

Additional prebuilds exist for a given preset configuration; these must be deleted.

(t *testing.T)

// Additional prebuilds exist for a given preset configuration; these must be deleted.
func TestExtraneous(t *testing.T) {
	t.Parallel()
	current := opts[optionSet0]
	clock := quartz.NewMock(t)

	// GIVEN: a preset with 1 desired prebuild.
	presets := []database.GetTemplatePresetsWithPrebuildsRow{
		preset(true, 1, current),
	}

	var older uuid.UUID
	// GIVEN: 2 running prebuilds for the preset.
	running := []database.GetRunningPrebuiltWorkspacesRow{
		prebuiltWorkspace(current, clock, func(row database.GetRunningPrebuiltWorkspacesRow) database.GetRunningPrebuiltWorkspacesRow {
			// The older of the running prebuilds will be deleted in order to maintain freshness.
			row.CreatedAt = clock.Now().Add(-time.Hour)
			older = row.ID
			return row
		}),
		prebuiltWorkspace(current, clock, func(row database.GetRunningPrebuiltWorkspacesRow) database.GetRunningPrebuiltWorkspacesRow {
			row.CreatedAt = clock.Now()
			return row
		}),
	}

	// GIVEN: NO prebuilds in progress.
	var inProgress []database.CountInProgressPrebuildsRow

	// WHEN: calculating the current preset's state.
	snapshot := prebuilds.NewGlobalSnapshot(presets, nil, running, inProgress, nil, nil, nil, quartz.NewMock(t), testutil.Logger(t))
	ps, err := snapshot.FilterByPreset(current.presetID)
	require.NoError(t, err)

	// THEN: an extraneous prebuild is detected and marked for deletion.
	state := ps.CalculateState()
	actions, err := ps.CalculateActions(backoffInterval)
	require.NoError(t, err)
	validateState(t, prebuilds.ReconciliationState{
		Actual: 2, Desired: 1, Extraneous: 1, Eligible: 2,
	}, *state)
	validateActions(t, []*prebuilds.ReconciliationActions{
		{
			ActionType: prebuilds.ActionTypeDelete,
			DeleteIDs:  []uuid.UUID{older},
		},
	}, actions)
}

// A prebuild is considered Expired when it has exceeded their time-to-live (TTL)
// specified in the preset's cache invalidation invalidate_after_secs parameter.