Struct TestData 

pub struct TestData { /* private fields */ }

A mechanism for providing dynamically updatable feature flag state in a simplified form to an SDK client.

TestData can be passed to crate::ConfigBuilder::data_source to drive the FDv1 data source, or to crate::DataSystemBuilder::synchronizer to drive the FDv2 data system. When the SDK client is started, it receives the current flag state from TestData and is notified of subsequent changes.

With the FDv2 data system, updates are delivered asynchronously. A change made with TestData::update may take a moment to be reflected in flag evaluations.

Flag data can be provided using FlagBuilder (via TestData::update) or by passing fully constructed Flag objects (via TestData::use_preconfigured_flag).

Cloning a TestData creates a new handle that shares the same underlying state.

Implementations

impl TestData

pub fn new() -> Self

Creates a new TestData instance with no initial flag data.

pub fn flag(&self, key: &str) -> FlagBuilder

Returns a copy of the current FlagBuilder for the specified flag key, or a new default builder if the flag has not been configured yet.

If the flag was previously set via TestData::use_preconfigured_flag, this returns a new default builder since FlagBuilder cannot represent all flag fields (e.g. prerequisites, migration settings, client visibility) and hydrating from a Flag would silently lose that data.

pub fn update(&self, builder: FlagBuilder)

Updates the test data with the given flag builder.

If there are any connected SDK clients, they will be notified of the flag change. The flag version is automatically incremented.

pub fn use_preconfigured_flag(&self, flag: Flag)

Sets a preconfigured Flag directly.

Use this when you need to set a flag with a configuration that cannot be expressed through FlagBuilder. The flag version is automatically managed.

Note: calling TestData::flag after this will return a new default builder, not a builder derived from the preconfigured flag.

pub fn use_preconfigured_segment(&self, segment: Segment)

Sets a preconfigured Segment directly.

The segment version is automatically managed.

Trait Implementations

impl Clone for TestData

fn clone(&self) -> TestData

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for TestData

fn default() -> Self

Returns the “default value” for a type.

impl FDv2SynchronizerConfig for TestData

fn build_synchronizer( &self, _context: &DataSourceBuildContext<'_>, ) -> Result<Box<dyn SynchronizerFactory>, DataSystemBuildError>

Builds a synchronizer factory from this configuration.

fn to_owned(&self) -> Box<dyn FDv2SynchronizerConfig>

Clones this configuration into a new box.