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| 1 | +// |
| 2 | +// ItemsLoadableStateTests.swift |
| 3 | +// StefanTests |
| 4 | +// |
| 5 | +// Created by Szymon Mrozek on 04.02.2018. |
| 6 | +// Copyright © 2018 AppUnite. All rights reserved. |
| 7 | +// |
| 8 | + |
| 9 | +import XCTest |
| 10 | + |
| 11 | +@testable import Stefan_iOS |
| 12 | + |
| 13 | +class ItemsLoadableStateTests: XCTestCase { |
| 14 | + |
| 15 | + enum TestError: Error { |
| 16 | + case someError |
| 17 | + } |
| 18 | + |
| 19 | + override func setUp() { |
| 20 | + super.setUp() |
| 21 | + } |
| 22 | + |
| 23 | + public func testItemsCount() { |
| 24 | + |
| 25 | + let items = FruitStorage.smallFruits |
| 26 | + |
| 27 | + var state = ItemsLoadableState<Fruit>.loaded(items: items) |
| 28 | + |
| 29 | + let notEmptyItemsCount = items.count |
| 30 | + |
| 31 | + XCTAssertEqual(state.itemsCount, notEmptyItemsCount) |
| 32 | + |
| 33 | + state = .noContent |
| 34 | + |
| 35 | + XCTAssertEqual(state.itemsCount, 0) |
| 36 | + } |
| 37 | + |
| 38 | + public func testGrabbingItemsInLoadedStateCorrectly() { |
| 39 | + |
| 40 | + let state = ItemsLoadableState<Fruit>.loaded(items: FruitStorage.bigFruits) |
| 41 | + |
| 42 | + do { |
| 43 | + _ = try state.items() |
| 44 | + } catch { |
| 45 | + XCTFail("Should not throw error") |
| 46 | + } |
| 47 | + } |
| 48 | + |
| 49 | + public func testGrabbingItemsInLoadedStateWith0Items() { |
| 50 | + |
| 51 | + let state = ItemsLoadableState<Fruit>.loaded(items: []) |
| 52 | + |
| 53 | + do { |
| 54 | + _ = try state.items() |
| 55 | + XCTFail("Should not return items without error") |
| 56 | + } catch let error { |
| 57 | + guard let stateError = error as? ItemsLoadableState<Fruit>.ItemsLoadableStateError, stateError == ItemsLoadableState<Fruit>.ItemsLoadableStateError.zeroItemsInLoadedState else { |
| 58 | + XCTFail("Wrong error thrown") |
| 59 | + return |
| 60 | + } |
| 61 | + } |
| 62 | + } |
| 63 | + |
| 64 | + public func testGrabbingItemsInRefreshingStateCorrectly() { |
| 65 | + |
| 66 | + let state = ItemsLoadableState<Fruit>.refreshing(silent: true, items: FruitStorage.mediumFruits) |
| 67 | + |
| 68 | + do { |
| 69 | + _ = try state.items() |
| 70 | + } catch { |
| 71 | + XCTFail("Should not throw error") |
| 72 | + } |
| 73 | + } |
| 74 | + |
| 75 | + public func testGrabbingItemsInSilentRefreshState() { |
| 76 | + |
| 77 | + let state = ItemsLoadableState<Fruit>.refreshing(silent: false, items: FruitStorage.bigFruits) |
| 78 | + |
| 79 | + do { |
| 80 | + _ = try state.items() |
| 81 | + XCTFail("Should not return items without error") |
| 82 | + } catch let error { |
| 83 | + guard let stateError = error as? ItemsLoadableState<Fruit>.ItemsLoadableStateError, stateError == ItemsLoadableState<Fruit>.ItemsLoadableStateError.wrongStateForReadingItems else { |
| 84 | + XCTFail("Wrong error thrown") |
| 85 | + return |
| 86 | + } |
| 87 | + } |
| 88 | + } |
| 89 | + |
| 90 | + public func testGrabbingItemsInWrongStates() { |
| 91 | + |
| 92 | + let idleState = ItemsLoadableState<Fruit>.idle |
| 93 | + let noContentState = ItemsLoadableState<Fruit>.noContent |
| 94 | + let loadingState = ItemsLoadableState<Fruit>.loading |
| 95 | + |
| 96 | + do { |
| 97 | + _ = try idleState.items() |
| 98 | + _ = try noContentState.items() |
| 99 | + _ = try loadingState.items() |
| 100 | + XCTFail("Should not return items without error") |
| 101 | + } catch let error { |
| 102 | + guard let stateError = error as? ItemsLoadableState<Fruit>.ItemsLoadableStateError, stateError == ItemsLoadableState<Fruit>.ItemsLoadableStateError.wrongStateForReadingItems else { |
| 103 | + XCTFail("Wrong error thrown") |
| 104 | + return |
| 105 | + } |
| 106 | + } |
| 107 | + } |
| 108 | + |
| 109 | + public func testInitWithItemsExplicity() { |
| 110 | + |
| 111 | + let items = FruitStorage.mediumFruits |
| 112 | + |
| 113 | + let state = ItemsLoadableState<Fruit>(items) |
| 114 | + |
| 115 | + XCTAssertEqual(state, ItemsLoadableState<Fruit>.loaded(items: items)) |
| 116 | + } |
| 117 | + |
| 118 | + public func testInitWithNoItems() { |
| 119 | + |
| 120 | + let state = ItemsLoadableState<Fruit>([]) |
| 121 | + XCTAssertEqual(state, ItemsLoadableState<Fruit>.noContent) |
| 122 | + } |
| 123 | + |
| 124 | + public func testStatesComparingNoItems() { |
| 125 | + |
| 126 | + var lState = ItemsLoadableState<Fruit>.idle |
| 127 | + var rState = ItemsLoadableState<Fruit>.idle |
| 128 | + XCTAssertEqual(lState, rState) |
| 129 | + |
| 130 | + |
| 131 | + lState = ItemsLoadableState<Fruit>.loading |
| 132 | + rState = ItemsLoadableState<Fruit>.loading |
| 133 | + XCTAssertEqual(lState, rState) |
| 134 | + |
| 135 | + |
| 136 | + lState = ItemsLoadableState<Fruit>.noContent |
| 137 | + rState = ItemsLoadableState<Fruit>.noContent |
| 138 | + XCTAssertEqual(lState, rState) |
| 139 | + |
| 140 | + |
| 141 | + lState = ItemsLoadableState<Fruit>.error(TestError.someError) |
| 142 | + rState = ItemsLoadableState<Fruit>.error(TestError.someError) |
| 143 | + XCTAssertEqual(lState, rState) |
| 144 | + |
| 145 | + |
| 146 | + lState = ItemsLoadableState<Fruit>.idle |
| 147 | + rState = ItemsLoadableState<Fruit>.loading |
| 148 | + XCTAssertNotEqual(lState, rState) |
| 149 | + |
| 150 | + } |
| 151 | + |
| 152 | + public func testStatesComparingRefreshing() { |
| 153 | + |
| 154 | + let items = FruitStorage.smallFruits |
| 155 | + |
| 156 | + var lState = ItemsLoadableState<Fruit>.refreshing(silent: true, items: items) |
| 157 | + var rState = ItemsLoadableState<Fruit>.refreshing(silent: true, items: items) |
| 158 | + XCTAssertEqual(lState, rState) |
| 159 | + |
| 160 | + |
| 161 | + lState = ItemsLoadableState<Fruit>.refreshing(silent: false, items: items) |
| 162 | + rState = ItemsLoadableState<Fruit>.refreshing(silent: false, items: items) |
| 163 | + XCTAssertEqual(lState, rState) |
| 164 | + |
| 165 | + |
| 166 | + lState = ItemsLoadableState<Fruit>.refreshing(silent: false, items: items) |
| 167 | + rState = ItemsLoadableState<Fruit>.refreshing(silent: true, items: items) |
| 168 | + XCTAssertNotEqual(lState, rState) |
| 169 | + |
| 170 | + |
| 171 | + lState = ItemsLoadableState<Fruit>.refreshing(silent: true, items: []) |
| 172 | + rState = ItemsLoadableState<Fruit>.refreshing(silent: true, items: items) |
| 173 | + XCTAssertNotEqual(lState, rState) |
| 174 | + |
| 175 | + } |
| 176 | + |
| 177 | + public func testStatesComparingLoaded() { |
| 178 | + |
| 179 | + let items = FruitStorage.smallFruits |
| 180 | + |
| 181 | + var lState = ItemsLoadableState<Fruit>.loaded(items: items) |
| 182 | + var rState = ItemsLoadableState<Fruit>.loaded(items: items) |
| 183 | + XCTAssertEqual(lState, rState) |
| 184 | + |
| 185 | + |
| 186 | + lState = ItemsLoadableState<Fruit>.loaded(items: []) |
| 187 | + rState = ItemsLoadableState<Fruit>.loaded(items: items) |
| 188 | + XCTAssertNotEqual(lState, rState) |
| 189 | + |
| 190 | + |
| 191 | + lState = ItemsLoadableState<Fruit>.loaded(items: items) |
| 192 | + rState = ItemsLoadableState<Fruit>.loaded(items: items + FruitStorage.mediumFruits) |
| 193 | + XCTAssertNotEqual(lState, rState) |
| 194 | + |
| 195 | + } |
| 196 | + |
| 197 | +} |
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