4. Testing

Page 1 <img data-url='document/4-testing.html?page=1' data-page='1' class='cut-thumb lazyload' alt='Page 1: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/1.jpg' width='140' height='200' /> Test your assumptions!

Page 2 <img data-url='document/4-testing.html?page=2' data-page='2' class='cut-thumb lazyload' alt='Page 2: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/2.jpg' width='140' height='200' /> What could go wrong?

Page 3 <img data-url='document/4-testing.html?page=3' data-page='3' class='cut-thumb lazyload' alt='Page 3: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/3.jpg' width='140' height='200' /> = what should you test!

Page 4 <img data-url='document/4-testing.html?page=4' data-page='4' class='cut-thumb lazyload' alt='Page 4: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/4.jpg' width='140' height='200' /> Bounds for numbers can be tested

Page 5 <img data-url='document/4-testing.html?page=5' data-page='5' class='cut-thumb lazyload' alt='Page 5: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/5.jpg' width='140' height='200' /> Page 6 <img data-url='document/4-testing.html?page=6' data-page='6' class='cut-thumb lazyload' alt='Page 6: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/6.jpg' width='140' height='200' /> Can we sell more than there is in stock?

Page 7 <img data-url='document/4-testing.html?page=7' data-page='7' class='cut-thumb lazyload' alt='Page 7: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/7.jpg' width='140' height='200' /> How to test?There are two different ways

Page 8 <img data-url='document/4-testing.html?page=8' data-page='8' class='cut-thumb lazyload' alt='Page 8: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/8.jpg' width='140' height='200' /> Conditional formatting

Page 9 <img data-url='document/4-testing.html?page=9' data-page='9' class='cut-thumb lazyload' alt='Page 9: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/9.jpg' width='140' height='200' /> Checks

Page 10 <img data-url='document/4-testing.html?page=10' data-page='10' class='cut-thumb lazyload' alt='Page 10: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/10.jpg' width='140' height='200' /> In software these are called ‘guards’

Page 11 <img data-url='document/4-testing.html?page=11' data-page='11' class='cut-thumb lazyload' alt='Page 11: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/11.jpg' width='140' height='200' /> Guards

Page 12 <img data-url='document/4-testing.html?page=12' data-page='12' class='cut-thumb lazyload' alt='Page 12: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/12.jpg' width='140' height='200' /> But, not all guards are useful ones

Page 13 <img data-url='document/4-testing.html?page=13' data-page='13' class='cut-thumb lazyload' alt='Page 13: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/13.jpg' width='140' height='200' /> Page 14 <img data-url='document/4-testing.html?page=14' data-page='14' class='cut-thumb lazyload' alt='Page 14: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/14.jpg' width='140' height='200' /> Other things to test

Page 15 <img data-url='document/4-testing.html?page=15' data-page='15' class='cut-thumb lazyload' alt='Page 15: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/15.jpg' width='140' height='200' /> Assumptions

Page 16 <img data-url='document/4-testing.html?page=16' data-page='16' class='cut-thumb lazyload' alt='Page 16: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/16.jpg' width='140' height='200' /> Page 17 <img data-url='document/4-testing.html?page=17' data-page='17' class='cut-thumb lazyload' alt='Page 17: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/17.jpg' width='140' height='200' /> Input

Page 18 <img data-url='document/4-testing.html?page=18' data-page='18' class='cut-thumb lazyload' alt='Page 18: 4. Testing' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader036.cupdf.com/reader036/viewer/2022081602/546e123baf7959274d8b485e/html5/thumbnails/18.jpg' width='140' height='200' />

4. Testing

Education

useful ones

different ways

conditional formatting