Reposted by Brandon Williams
A brand new library from Point-Free!
DebugSnaphots can instantly make your classes and @Observable models debuggable and testable. Simply apply the macro and get insight into how data changes over time, and write exhaustive tests on your feature's logic.
www.pointfree.co/blog/posts/2...
pointfree.co
DebugSnapshots: Public beta
DebugSnapshots is now in public beta! After incubating in Point-Free Beta Previews, it is the first library to graduate to the public, bringing exhaustive testing and focused debugging tools to…
![Screenshot of code showing how to group multiple SQL statements in a single transaction and power a SwiftUI view with that state.
The code reads as follows:
struct FactsView: View {
@SharedReader(.fetch(Facts(ordering: .savedAt))) var facts = Facts.Value()
var body: some View {
List {
Section {
Text("Unarchived facts: \(facts.unarchivedFactsCount)")
Text("Archived facts: \(facts.archivedFactsCount)")
}
ForEach(facts.favoriteFacts) { fact in
Text(fact.value)
}
}
}
}
struct Facts: FetchKeyRequest {
struct State {
var archivedFactsCount = 0
var favoriteFacts: [Fact] = []
var unarchivedFactsCount = 0
}
let ordering: Ordering
func fetch(_ db: Database) throws -> State {
let archived = Fact.filter(Column("isArchived"))
let unarchived = Fact.filter(!Column("isArchived"))
return try State(
archivedFactsCount: archived.fetchCount(db),
favoriteFacts: unarchived.order(ordering.orderingTerm).fetchAll(db),
unarchivedFactsCount: unarchived.fetchCount(db)
)
}
}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:jij7pkovdqzb3vqdgm2w4ibh/bafkreifjalualnri54xrvbimpvmgpnmqriymgrwlridn7pf7pctbpmmety)
![A screenshot of code showing how to use the tools of Swift Sharing library to power a feature's state from a SQLite query. The code reads as follows:
@Observable
@MainActor
class FactFeatureModel {
//@Shared(.fileStorage(.factsURL)))
//var favoriteFacts: [Fact] = []
@SharedReader(.fetchAll("SELECT * FROM facts"))
var favoriteFacts: [Fact] = []
// ...
}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:jij7pkovdqzb3vqdgm2w4ibh/bafkreihoyxac2onzcdrmefbh6ov2h4nyxy6y5ce3b3qgskv6a54y53kdre)
![Screenshot of code showing how to use the file storage persistence strategy with the @Shared property wrapper:
@Observable
class FactFeatureModel {
// Persist count to UserDefaults:
@ObservationIgnored
@Shared(.appStorage("count")) var count = 0
// Persist favorite facts to the file system:
@ObservationIgnored
@Shared(.fileStorage(url)) var facts: [String] = []
}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:jij7pkovdqzb3vqdgm2w4ibh/bafkreibmeko6h2dbjh2xz6bmmgrg3ddwxewyizurwrn664p4i3h7bbhs4u)
