|
| 1 | +import Testing |
| 2 | +import Foundation |
| 3 | +@testable import PointOfSale |
| 4 | +@testable import Yosemite |
| 5 | + |
| 6 | +final class PointOfSaleObservableItemsControllerTests { |
| 7 | + |
| 8 | + // MARK: - Test Helpers |
| 9 | + |
| 10 | + private func makeSimpleProduct(id: UUID = UUID(), name: String = "Test Product", productID: Int64 = 1) -> POSItem { |
| 11 | + .simpleProduct(POSSimpleProduct( |
| 12 | + id: id, |
| 13 | + name: name, |
| 14 | + formattedPrice: "$2.00", |
| 15 | + productID: productID, |
| 16 | + price: "2.00", |
| 17 | + manageStock: false, |
| 18 | + stockQuantity: nil, |
| 19 | + stockStatusKey: "" |
| 20 | + )) |
| 21 | + } |
| 22 | + |
| 23 | + private func makeVariation(id: UUID = UUID(), name: String = "Test Variation", variationID: Int64 = 1) -> POSItem { |
| 24 | + .variation(POSVariation( |
| 25 | + id: id, |
| 26 | + name: name, |
| 27 | + formattedPrice: "$2.00", |
| 28 | + price: "2.00", |
| 29 | + productID: 100, |
| 30 | + variationID: variationID, |
| 31 | + parentProductName: "Parent Product" |
| 32 | + )) |
| 33 | + } |
| 34 | + |
| 35 | + // MARK: - Tests |
| 36 | + |
| 37 | + @Test func test_initial_state_is_loading_container_with_initial_root() { |
| 38 | + // Given |
| 39 | + let dataSource = MockPOSObservableDataSource() |
| 40 | + dataSource.isLoadingProducts = true |
| 41 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 42 | + |
| 43 | + // Then |
| 44 | + #expect(sut.itemsViewState.containerState == .loading) |
| 45 | + #expect(sut.itemsViewState.itemsStack.root == .initial) |
| 46 | + #expect(sut.itemsViewState.itemsStack.itemStates.isEmpty) |
| 47 | + } |
| 48 | + |
| 49 | + @Test func test_load_products_transitions_to_loaded_state() async { |
| 50 | + // Given |
| 51 | + let dataSource = MockPOSObservableDataSource() |
| 52 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 53 | + |
| 54 | + let mockItems = [makeSimpleProduct()] |
| 55 | + dataSource.productItems = mockItems |
| 56 | + dataSource.isLoadingProducts = false |
| 57 | + dataSource.hasMoreProducts = false |
| 58 | + |
| 59 | + // When |
| 60 | + await sut.loadItems(base: .root) |
| 61 | + |
| 62 | + // Then |
| 63 | + #expect(sut.itemsViewState.containerState == .content) |
| 64 | + #expect(sut.itemsViewState.itemsStack.root == .loaded(mockItems, hasMoreItems: false)) |
| 65 | + } |
| 66 | + |
| 67 | + @Test func test_load_products_with_more_pages_sets_hasMoreItems() async { |
| 68 | + // Given |
| 69 | + let dataSource = MockPOSObservableDataSource() |
| 70 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 71 | + |
| 72 | + let mockItems = [makeSimpleProduct(productID: 1), makeSimpleProduct(productID: 2)] |
| 73 | + dataSource.productItems = mockItems |
| 74 | + dataSource.isLoadingProducts = false |
| 75 | + dataSource.hasMoreProducts = true |
| 76 | + |
| 77 | + // When |
| 78 | + await sut.loadItems(base: .root) |
| 79 | + |
| 80 | + // Then |
| 81 | + #expect(sut.itemsViewState.itemsStack.root == .loaded(mockItems, hasMoreItems: true)) |
| 82 | + } |
| 83 | + |
| 84 | + @Test func test_load_products_when_empty_results_in_empty_state() async { |
| 85 | + // Given |
| 86 | + let dataSource = MockPOSObservableDataSource() |
| 87 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 88 | + |
| 89 | + dataSource.productItems = [] |
| 90 | + dataSource.isLoadingProducts = false |
| 91 | + |
| 92 | + // When |
| 93 | + await sut.loadItems(base: .root) |
| 94 | + |
| 95 | + // Then |
| 96 | + #expect(sut.itemsViewState.containerState == .content) |
| 97 | + #expect(sut.itemsViewState.itemsStack.root == .empty) |
| 98 | + } |
| 99 | + |
| 100 | + @Test func test_load_variations_for_parent() async { |
| 101 | + // Given |
| 102 | + let dataSource = MockPOSObservableDataSource() |
| 103 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 104 | + |
| 105 | + let parentProduct = POSVariableParentProduct( |
| 106 | + id: UUID(), |
| 107 | + name: "Parent", |
| 108 | + productImageSource: nil, |
| 109 | + productID: 100, |
| 110 | + allAttributes: [] |
| 111 | + ) |
| 112 | + let parentItem = POSItem.variableParentProduct(parentProduct) |
| 113 | + |
| 114 | + let mockVariations = [makeVariation(variationID: 1), makeVariation(variationID: 2)] |
| 115 | + dataSource.variationItems = mockVariations |
| 116 | + dataSource.isLoadingVariations = false |
| 117 | + dataSource.hasMoreVariations = false |
| 118 | + |
| 119 | + // When |
| 120 | + await sut.loadItems(base: .parent(parentItem)) |
| 121 | + |
| 122 | + // Then |
| 123 | + #expect(sut.itemsViewState.itemsStack.itemStates[parentItem] == .loaded(mockVariations, hasMoreItems: false)) |
| 124 | + } |
| 125 | + |
| 126 | + @Test func test_load_variations_when_empty_results_in_empty_state() async { |
| 127 | + // Given |
| 128 | + let dataSource = MockPOSObservableDataSource() |
| 129 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 130 | + |
| 131 | + let parentProduct = POSVariableParentProduct( |
| 132 | + id: UUID(), |
| 133 | + name: "Parent", |
| 134 | + productImageSource: nil, |
| 135 | + productID: 100, |
| 136 | + allAttributes: [] |
| 137 | + ) |
| 138 | + let parentItem = POSItem.variableParentProduct(parentProduct) |
| 139 | + |
| 140 | + dataSource.variationItems = [] |
| 141 | + dataSource.isLoadingVariations = false |
| 142 | + |
| 143 | + // When |
| 144 | + await sut.loadItems(base: .parent(parentItem)) |
| 145 | + |
| 146 | + // Then |
| 147 | + #expect(sut.itemsViewState.itemsStack.itemStates[parentItem] == .empty) |
| 148 | + } |
| 149 | + |
| 150 | + @Test func test_products_and_variations_are_independent() async { |
| 151 | + // Given |
| 152 | + let dataSource = MockPOSObservableDataSource() |
| 153 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 154 | + |
| 155 | + let mockProducts = [makeSimpleProduct(productID: 1), makeSimpleProduct(productID: 2)] |
| 156 | + let mockVariations = [makeVariation()] |
| 157 | + |
| 158 | + let parentProduct = POSVariableParentProduct( |
| 159 | + id: UUID(), |
| 160 | + name: "Parent", |
| 161 | + productImageSource: nil, |
| 162 | + productID: 100, |
| 163 | + allAttributes: [] |
| 164 | + ) |
| 165 | + let parentItem = POSItem.variableParentProduct(parentProduct) |
| 166 | + |
| 167 | + // When: Load products |
| 168 | + dataSource.productItems = mockProducts |
| 169 | + dataSource.isLoadingProducts = false |
| 170 | + await sut.loadItems(base: .root) |
| 171 | + |
| 172 | + // Then: Products loaded, no variations |
| 173 | + #expect(sut.itemsViewState.itemsStack.root.items.count == 2) |
| 174 | + #expect(sut.itemsViewState.itemsStack.itemStates.isEmpty) |
| 175 | + |
| 176 | + // When: Load variations |
| 177 | + dataSource.variationItems = mockVariations |
| 178 | + dataSource.isLoadingVariations = false |
| 179 | + await sut.loadItems(base: .parent(parentItem)) |
| 180 | + |
| 181 | + // Then: Both products and variations present |
| 182 | + #expect(sut.itemsViewState.itemsStack.root.items.count == 2) |
| 183 | + #expect(sut.itemsViewState.itemsStack.itemStates[parentItem]?.items.count == 1) |
| 184 | + } |
| 185 | + |
| 186 | + @Test func test_load_next_items_delegates_to_data_source() async { |
| 187 | + // Given |
| 188 | + let dataSource = MockPOSObservableDataSource() |
| 189 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 190 | + |
| 191 | + // Simulate initial load |
| 192 | + dataSource.productItems = [makeSimpleProduct()] |
| 193 | + dataSource.isLoadingProducts = false |
| 194 | + dataSource.hasMoreProducts = true |
| 195 | + await sut.loadItems(base: .root) |
| 196 | + |
| 197 | + // When |
| 198 | + await sut.loadNextItems(base: .root) |
| 199 | + |
| 200 | + // Then: loadMoreProducts should be called (verified by state change in mock) |
| 201 | + // Note: Mock doesn't actually track calls, but we can verify the state |
| 202 | + #expect(sut.itemsViewState.containerState == .content) |
| 203 | + } |
| 204 | + |
| 205 | + @Test func test_refresh_delegates_to_data_source() async { |
| 206 | + // Given |
| 207 | + let dataSource = MockPOSObservableDataSource() |
| 208 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 209 | + |
| 210 | + dataSource.productItems = [makeSimpleProduct()] |
| 211 | + dataSource.isLoadingProducts = false |
| 212 | + await sut.loadItems(base: .root) |
| 213 | + |
| 214 | + // When |
| 215 | + await sut.refreshItems(base: .root) |
| 216 | + |
| 217 | + // Then: Should still be in content state |
| 218 | + #expect(sut.itemsViewState.containerState == .content) |
| 219 | + } |
| 220 | + |
| 221 | + @Test func test_switching_parent_resets_variation_state() async { |
| 222 | + // Given |
| 223 | + let dataSource = MockPOSObservableDataSource() |
| 224 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 225 | + |
| 226 | + let parent1 = POSVariableParentProduct(id: UUID(), name: "Parent 1", productImageSource: nil, productID: 100, allAttributes: []) |
| 227 | + let parentItem1 = POSItem.variableParentProduct(parent1) |
| 228 | + |
| 229 | + let parent2 = POSVariableParentProduct(id: UUID(), name: "Parent 2", productImageSource: nil, productID: 200, allAttributes: []) |
| 230 | + let parentItem2 = POSItem.variableParentProduct(parent2) |
| 231 | + |
| 232 | + // When: Load parent 1 variations |
| 233 | + dataSource.variationItems = [makeVariation()] |
| 234 | + dataSource.isLoadingVariations = false |
| 235 | + await sut.loadItems(base: .parent(parentItem1)) |
| 236 | + |
| 237 | + #expect(sut.itemsViewState.itemsStack.itemStates[parentItem1]?.items.count == 1) |
| 238 | + |
| 239 | + // When: Load parent 2 variations |
| 240 | + dataSource.variationItems = [makeVariation(variationID: 1), makeVariation(variationID: 2)] |
| 241 | + await sut.loadItems(base: .parent(parentItem2)) |
| 242 | + |
| 243 | + // Then: Parent 2 variations shown, parent 1 not in states anymore |
| 244 | + #expect(sut.itemsViewState.itemsStack.itemStates[parentItem2]?.items.count == 2) |
| 245 | + #expect(sut.itemsViewState.itemsStack.itemStates[parentItem1] == nil) |
| 246 | + } |
| 247 | + |
| 248 | + @Test func test_error_state_when_data_source_has_error() async { |
| 249 | + // Given |
| 250 | + let dataSource = MockPOSObservableDataSource() |
| 251 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 252 | + |
| 253 | + dataSource.productItems = [] |
| 254 | + dataSource.isLoadingProducts = false |
| 255 | + dataSource.error = NSError(domain: "test", code: 1) |
| 256 | + |
| 257 | + // When |
| 258 | + await sut.loadItems(base: .root) |
| 259 | + |
| 260 | + // Then |
| 261 | + guard case .error = sut.itemsViewState.itemsStack.root else { |
| 262 | + Issue.record("Expected error state, got \(sut.itemsViewState.itemsStack.root)") |
| 263 | + return |
| 264 | + } |
| 265 | + } |
| 266 | + |
| 267 | + @Test func test_loading_state_preserves_existing_items() async { |
| 268 | + // Given |
| 269 | + let dataSource = MockPOSObservableDataSource() |
| 270 | + let sut = PointOfSaleObservableItemsController(dataSource: dataSource) |
| 271 | + |
| 272 | + let mockItems = [makeSimpleProduct(productID: 1), makeSimpleProduct(productID: 2)] |
| 273 | + |
| 274 | + // Load initial items |
| 275 | + dataSource.productItems = mockItems |
| 276 | + dataSource.isLoadingProducts = false |
| 277 | + await sut.loadItems(base: .root) |
| 278 | + |
| 279 | + // When: Start loading more |
| 280 | + dataSource.isLoadingProducts = true |
| 281 | + |
| 282 | + // Then: Loading state should preserve items |
| 283 | + #expect(sut.itemsViewState.itemsStack.root == .loading(mockItems)) |
| 284 | + } |
| 285 | +} |
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