iOS client for Grain
grain.social
ios
photography
atproto
test: add FeedCache round-trip tests
Cover save/load round-trip, missing-key empty return, empty-save
preserving prior data, and keys with slashes/colons/spaces.
authored by
Hima Aramona
and committed by
Chad Miller
360677e8
b0f6fd24
+59
+59
GrainTests/FeedCacheTests.swift
+59
GrainTests/FeedCacheTests.swift
···
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@testable import Grain
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import XCTest
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@MainActor
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final class FeedCacheTests: XCTestCase {
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private func makeGallery(uri: String, cid: String = "bafytest") -> GrainGallery {
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GrainGallery(
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uri: uri,
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cid: cid,
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creator: GrainProfile(cid: "bafyprofile", did: "did:plc:test", handle: "tester.test"),
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indexedAt: "2026-04-11T00:00:00Z"
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)
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}
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override func tearDown() {
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let dir = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask)[0]
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.appendingPathComponent("grain_feed_cache", isDirectory: true)
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if let files = try? FileManager.default.contentsOfDirectory(at: dir, includingPropertiesForKeys: nil) {
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for file in files {
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try? FileManager.default.removeItem(at: file)
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}
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}
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super.tearDown()
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}
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func testRoundTripPersistsAndLoadsGalleries() {
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let key = "test_round_trip"
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let input = [
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makeGallery(uri: "at://a", cid: "cid-a"),
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makeGallery(uri: "at://b", cid: "cid-b"),
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]
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FeedCache.shared.save(input, key: key)
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let loaded = FeedCache.shared.load(key: key)
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XCTAssertEqual(loaded.map(\.uri), ["at://a", "at://b"])
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XCTAssertEqual(loaded.map(\.cid), ["cid-a", "cid-b"])
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}
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func testLoadReturnsEmptyForMissingKey() {
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XCTAssertEqual(FeedCache.shared.load(key: "test_missing_key").count, 0)
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}
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func testSaveIgnoresEmptyArrayAndPreservesPriorData() {
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let key = "test_empty_save"
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let seed = [makeGallery(uri: "at://seed")]
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FeedCache.shared.save(seed, key: key)
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FeedCache.shared.save([], key: key)
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let loaded = FeedCache.shared.load(key: key)
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XCTAssertEqual(loaded.map(\.uri), ["at://seed"])
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}
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func testKeyWithSlashesColonsAndSpacesRoundTrips() {
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let key = "feed/home:pinned 1"
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let input = [makeGallery(uri: "at://tricky")]
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FeedCache.shared.save(input, key: key)
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XCTAssertEqual(FeedCache.shared.load(key: key).map(\.uri), ["at://tricky"])
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}
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}