DependencyContext.swift

/// A context for a collection of ``DependencyValues``.
///
/// There are three distinct contexts that dependencies can be loaded from and registered to:
///
///   * ``live``: The default context.
///   * ``preview``: A context for Xcode previews.
///   * ``test``: A context for tests.
public enum DependencyContext: Sendable {
    /// The default, "live" context for dependencies.
    ///
    /// This context is the default when a ``preview`` or ``test`` context is not detected.
    ///
    /// Dependencies accessed from a live context will use ``DependencyKey/liveValue`` to request a
    /// default value.
    case live
    
    /// A "preview" context for dependencies.
    ///
    /// This context is automatically inferred when running code from an Xcode preview.
    ///
    /// Dependencies accessed from a preview context will use ``TestDependencyKey/previewValue-8u2sy``
    /// to request a default value.
    case preview
    
    /// A "test" context for dependencies.
    ///
    /// This context is automatically inferred when running code from an XCTestCase.
    ///
    /// Dependencies accessed from a test context will use ``TestDependencyKey/testValue`` to request
    /// a default value.
    case test
}