zeus
115 lines
4.1 KiB
Swift
115 lines
4.1 KiB
Swift
import XCTest
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import GRDB
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// Tests about how minimal can class go regarding their initializers
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// What happens for a class without property, without any initializer?
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class EmptyRecordWithoutInitializer : Record {
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// nothing is required
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}
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// What happens if we add a mutable property, still without any initializer?
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// A compiler error: class 'RecordWithoutInitializer' has no initializers
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//
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// class RecordWithoutInitializer : Record {
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// let name: String?
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// }
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// What happens with a mutable property, and init(row: Row)?
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class RecordWithMutablePropertyAndRowInitializer : Record {
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var name: String?
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required init(row: Row) throws {
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try super.init(row: row) // super.init(row: row) is required
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self.name = "toto" // property can be set before or after super.init
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}
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}
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// What happens with a mutable property, and init()?
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class RecordWithMutablePropertyAndEmptyInitializer : Record {
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var name: String?
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override init() {
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super.init() // super.init() is required
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self.name = "toto" // property can be set before or after super.init
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}
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required init(row: Row) throws { // init(row) is required
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try super.init(row: row) // super.init(row: row) is required
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}
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}
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// What happens with a mutable property, and a custom initializer()?
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class RecordWithMutablePropertyAndCustomInitializer : Record {
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var name: String?
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init(name: String? = nil) {
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self.name = name
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super.init() // super.init() is required
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}
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required init(row: Row) throws { // init(row) is required
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try super.init(row: row) // super.init(row: row) is required
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}
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}
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// What happens with an immutable property?
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class RecordWithImmutableProperty : Record {
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let initializedFromRow: Bool
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required init(row: Row) throws { // An initializer is required, and the minimum is init(row)
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initializedFromRow = true // property must be set before super.init(row: row)
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try super.init(row: row) // super.init(row: row) is required
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}
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}
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// What happens with an immutable property and init()?
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class RecordWithPedigree : Record {
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let initializedFromRow: Bool
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override init() {
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initializedFromRow = false // property must be set before super.init(row: row)
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super.init() // super.init() is required
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}
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required init(row: Row) throws { // An initializer is required, and the minimum is init(row)
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initializedFromRow = true // property must be set before super.init(row: row)
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try super.init(row: row) // super.init(row: row) is required
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}
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}
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// What happens with an immutable property and a custom initializer()?
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class RecordWithImmutablePropertyAndCustomInitializer : Record {
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let initializedFromRow: Bool
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init(name: String? = nil) {
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initializedFromRow = false // property must be set before super.init(row: row)
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super.init() // super.init() is required
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}
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required init(row: Row) throws { // An initializer is required, and the minimum is init(row)
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initializedFromRow = true // property must be set before super.init(row: row)
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try super.init(row: row) // super.init(row: row) is required
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}
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}
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class RecordInitializersTests : GRDBTestCase {
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func testFetchedRecordAreInitializedFromRow() throws {
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// Here we test that Record.init(row: Row) can be overridden independently from Record.init().
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// People must be able to perform some initialization work when fetching records from the database.
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XCTAssertFalse(RecordWithPedigree().initializedFromRow)
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let dbQueue = try makeDatabaseQueue()
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try dbQueue.inDatabase { db in
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try db.execute(sql: "CREATE TABLE pedigrees (foo INTEGER)")
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try db.execute(sql: "INSERT INTO pedigrees (foo) VALUES (NULL)")
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let pedigree = try RecordWithPedigree.fetchOne(db, sql: "SELECT * FROM pedigrees")!
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XCTAssertTrue(pedigree.initializedFromRow) // very important
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}
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}
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}
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