* Helper function to create a fresh BookUI instance for testing * @param {number} currentPage - Current page number * @param {number} totalPages - Total number of pages * @returns {object} - BookUI-like object for testing
(currentPage, totalPages)
| 23 | * @returns {object} - BookUI-like object for testing |
| 24 | */ |
| 25 | function createBookState(currentPage, totalPages) { |
| 26 | return { |
| 27 | currentPage: currentPage, |
| 28 | totalPages: totalPages, |
| 29 | isAnimating: false, |
| 30 | viewMode: 'double', |
| 31 | |
| 32 | /** |
| 33 | * Check if previous page navigation should be disabled |
| 34 | * @returns {boolean} - True if prev navigation should be disabled |
| 35 | */ |
| 36 | isPrevDisabled: function() { |
| 37 | return this.currentPage <= 1; |
| 38 | }, |
| 39 | |
| 40 | /** |
| 41 | * Check if next page navigation should be disabled |
| 42 | * @returns {boolean} - True if next navigation should be disabled |
| 43 | */ |
| 44 | isNextDisabled: function() { |
| 45 | return this.currentPage >= this.totalPages; |
| 46 | }, |
| 47 | |
| 48 | /** |
| 49 | * Attempt to flip to previous page |
| 50 | * @returns {boolean} - True if flip was successful |
| 51 | */ |
| 52 | flipPrev: function() { |
| 53 | if (this.isPrevDisabled()) { |
| 54 | return false; |
| 55 | } |
| 56 | this.currentPage--; |
| 57 | return true; |
| 58 | }, |
| 59 | |
| 60 | /** |
| 61 | * Attempt to flip to next page |
| 62 | * @returns {boolean} - True if flip was successful |
| 63 | */ |
| 64 | flipNext: function() { |
| 65 | if (this.isNextDisabled()) { |
| 66 | return false; |
| 67 | } |
| 68 | this.currentPage++; |
| 69 | return true; |
| 70 | }, |
| 71 | |
| 72 | /** |
| 73 | * Check if current page is within valid range |
| 74 | * @returns {boolean} - True if page is valid |
| 75 | */ |
| 76 | isPageValid: function() { |
| 77 | return this.currentPage >= 1 && this.currentPage <= this.totalPages; |
| 78 | } |
| 79 | }; |
| 80 | } |
| 81 | |
| 82 | /** |