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import Paginator from '../paginator.js' |
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const TestCases = [ |
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{ |
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description: 'It should return the first page with 2 items', |
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items: [1, 2, 3, 4, 5], |
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page: 0, |
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size: 2, |
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url: '/', |
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expectedResult: { |
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_links: { |
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self: '/?size=2&page=0', |
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prev: null, |
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next: '/?size=2&page=1' |
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}, |
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count: 5, |
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size: 2, |
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page: 0, |
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pages: 3, |
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result: [1, 2] |
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} |
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}, |
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{ |
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description: 'It should return the second page with 2 items', |
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items: [1, 2, 3, 4, 5], |
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page: 1, |
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size: 2, |
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url: '/', |
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expectedResult: { |
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_links: { |
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self: '/?size=2&page=1', |
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prev: '/?size=2&page=0', |
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next: '/?size=2&page=2' |
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}, |
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count: 5, |
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size: 2, |
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page: 1, |
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pages: 3, |
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result: [3, 4] |
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} |
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}, |
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{ |
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description: 'It should return the last page with 1 item', |
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items: [1, 2, 3, 4, 5], |
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page: 2, |
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size: 2, |
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url: '/', |
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expectedResult: { |
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_links: { |
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self: '/?size=2&page=2', |
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prev: '/?size=2&page=1', |
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next: null |
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}, |
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count: 5, |
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size: 2, |
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page: 2, |
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pages: 3, |
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result: [5] |
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} |
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}, |
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{ |
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description: |
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'It should return the second page with 2 items and no next', |
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items: [1, 2, 3, 4], |
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page: 1, |
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size: 2, |
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url: '/', |
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expectedResult: { |
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_links: { |
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self: '/?size=2&page=1', |
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71
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prev: '/?size=2&page=0', |
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next: null |
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}, |
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count: 4, |
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size: 2, |
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page: 1, |
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pages: 2, |
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result: [3, 4] |
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} |
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80
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}, |
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{ |
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description: 'It should return null for prev and next', |
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83
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items: [1], |
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84
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page: 0, |
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85
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size: 2, |
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url: '/', |
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expectedResult: { |
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_links: { |
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self: '/?size=2&page=0', |
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prev: null, |
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next: null |
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92
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}, |
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93
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count: 1, |
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94
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size: 2, |
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95
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page: 0, |
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96
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pages: 1, |
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97
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result: [1] |
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98
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} |
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99
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}, |
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100
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{ |
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101
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description: 'It should return null for prev and next and self', |
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102
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items: [1], |
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103
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page: 0, |
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104
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size: 2, |
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105
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url: null, |
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expectedResult: { |
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107
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_links: { |
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108
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self: null, |
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109
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prev: null, |
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110
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next: null |
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111
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}, |
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112
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count: 1, |
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113
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size: 2, |
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114
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page: 0, |
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115
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pages: 1, |
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116
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result: [1] |
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117
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} |
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118
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}, |
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119
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{ |
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120
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description: 'It should use page 0 and size 10 by default', |
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121
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items: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11], |
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122
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page: null, |
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123
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size: null, |
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url: '/?test=true', |
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expectedResult: { |
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_links: { |
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self: '/?test=true&size=10&page=0', |
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128
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prev: null, |
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129
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next: '/?test=true&size=10&page=1' |
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130
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}, |
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131
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count: 11, |
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132
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size: 10, |
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133
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page: 0, |
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134
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pages: 2, |
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135
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result: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] |
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136
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} |
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137
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} |
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138
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] |
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139
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140
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describe.each(TestCases)( |
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141
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'Paginator helper', |
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142
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({ description, items, page, size, url, expectedResult }) => { |
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143
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it(description, () => { |
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144
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const results = Paginator({ |
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145
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items, |
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146
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page, |
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147
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size, |
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148
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url |
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149
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}) |
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150
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151
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expect(results.data).toEqual(expectedResult) |
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152
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}) |
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153
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} |
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154
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) |
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155
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156
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const ErrorTestCases = [ |
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157
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{ |
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158
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description: 'It should throw an error if the items arent an array', |
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159
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props: { |
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160
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items: null |
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161
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}, |
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162
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expectedResult: 'items is not an array' |
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163
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}, |
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164
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{ |
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165
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description: 'It should throw an error if the items arent an array', |
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166
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props: { |
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167
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items: 1 |
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168
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}, |
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169
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expectedResult: 'items is not an array' |
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170
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}, |
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171
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{ |
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172
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description: 'It should throw an error if the page is not a number', |
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173
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props: { |
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174
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items: [], |
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175
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page: 'a' |
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176
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}, |
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177
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expectedResult: 'page is not a valid number' |
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178
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}, |
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179
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{ |
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180
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description: |
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181
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'It should throw an error if the page number is to high or low', |
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182
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props: { |
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183
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items: [], |
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184
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page: 2 |
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185
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}, |
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186
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expectedResult: 'page is not a valid number' |
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187
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}, |
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188
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{ |
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189
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description: 'It should throw an error if the size is not a number', |
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190
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props: { |
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191
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items: [], |
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192
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size: 'a' |
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193
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}, |
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194
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expectedResult: 'size is not a valid positive number' |
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195
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}, |
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196
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{ |
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197
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description: 'It should throw an error if the url is not a string', |
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198
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props: { |
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199
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items: [], |
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200
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url: 1 |
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201
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}, |
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202
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expectedResult: 'url is not a valid string' |
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203
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} |
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204
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] |
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205
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206
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describe.each(ErrorTestCases)( |
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207
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'test paginator validation', |
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208
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({ description, props, expectedResult }) => { |
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209
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it(description, () => { |
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210
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expect(() => Paginator(props)).toThrowError(expectedResult) |
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211
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}) |
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212
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} |
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213
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) |
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214
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hckrnews /
paginator
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