test(files): Make scrolling tests independent from magic values

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

4 files changed, 185 insertions, 80 deletions

diff --git a/cypress/e2e/core-utils.ts b/cypress/e2e/core-utils.ts
index 24053941968..4756836387a 100644
--- a/cypress/e2e/core-utils.ts
+++ b/cypress/e2e/core-utils.ts
@@ -48,3 +48,43 @@ export enum UnifiedSearchFilter {
 export function getUnifiedSearchFilter(filter: UnifiedSearchFilter) {
 	return getUnifiedSearchModal().find(`[data-cy-unified-search-filters] [data-cy-unified-search-filter="${CSS.escape(filter)}"]`)
 }
+
+/**
+ * Assertion that an element is fully within the current viewport.
+ * @param $el The element
+ * @param expected If the element is expected to be fully in viewport or not fully
+ * @example
+ * ```js
+ * cy.get('#my-element')
+ *   .should(beFullyInViewport)
+ * ```
+ */
+export function beFullyInViewport($el: JQuery<HTMLElement>, expected = true) {
+	const { top, left, bottom, right } = $el.get(0)!.getBoundingClientRect()
+	const innerHeight = Cypress.$('body').innerHeight()!
+	const innerWidth = Cypress.$('body').innerWidth()!
+	const fullyVisible = top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth
+
+	console.debug(`fullyVisible: ${fullyVisible}, top: ${top >= 0}, left: ${left >= 0}, bottom: ${bottom <= innerHeight}, right: ${right <= innerWidth}`)
+
+	if (expected) {
+		// eslint-disable-next-line no-unused-expressions
+		expect(fullyVisible, 'Fully within viewport').to.be.true
+	} else {
+		// eslint-disable-next-line no-unused-expressions
+		expect(fullyVisible, 'Not fully within viewport').to.be.false
+	}
+}
+
+/**
+ * Opposite of `beFullyInViewport` - resolves when element is not or only partially in viewport.
+ * @param $el The element
+ * @example
+ * ```js
+ * cy.get('#my-element')
+ *   .should(notBeFullyInViewport)
+ * ```
+ */
+export function notBeFullyInViewport($el: JQuery<HTMLElement>) {
+	return beFullyInViewport($el, false)
+}
diff --git a/cypress/e2e/files/FilesUtils.ts b/cypress/e2e/files/FilesUtils.ts
index 37c2b1eff7e..2c7e2666d0c 100644
--- a/cypress/e2e/files/FilesUtils.ts
+++ b/cypress/e2e/files/FilesUtils.ts
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
-import type { User } from "@nextcloud/cypress"
+import type { User } from '@nextcloud/cypress'
 
 export const getRowForFileId = (fileid: number) => cy.get(`[data-cy-files-list-row-fileid="${fileid}"]`)
 export const getRowForFile = (filename: string) => cy.get(`[data-cy-files-list-row-name="${CSS.escape(filename)}"]`)
@@ -214,3 +214,45 @@ export const reloadCurrentFolder = () => {
 	cy.get('[data-cy-files-content-breadcrumbs]').findByRole('button', { description: 'Reload current directory' }).click()
 	cy.wait('@propfind')
 }
+
+/**
+ * Enable the grid mode for the files list.
+ * Will fail if already enabled!
+ */
+export function enableGridMode() {
+	cy.intercept('**/apps/files/api/v1/config/grid_view').as('setGridMode')
+	cy.findByRole('button', { name: 'Switch to grid view' })
+		.should('be.visible')
+		.click()
+	cy.wait('@setGridMode')
+}
+
+/**
+ * Calculate the needed viewport height to limit the visible rows of the file list.
+ * Requires a logged in user.
+ *
+ * @param rows The number of rows that should be displayed at the same time
+ */
+export function calculateViewportHeight(rows: number): Cypress.Chainable<number> {
+	cy.visit('/apps/files')
+
+	return cy.get('[data-cy-files-list]')
+		.should('be.visible')
+		.then((filesList) => {
+			const windowHeight = Cypress.$('body').outerHeight()!
+			// Size of other page elements
+			const outerHeight = Math.ceil(windowHeight - filesList.outerHeight()!)
+			// Size of before and filters
+			const beforeHeight = Math.ceil(Cypress.$('.files-list__before').outerHeight()!)
+			const filterHeight = Math.ceil(Cypress.$('.files-list__filters').outerHeight()!)
+			// Size of the table header
+			const tableHeaderHeight = Math.ceil(Cypress.$('[data-cy-files-list-thead]').outerHeight()!)
+			// table row height
+			const rowHeight = Math.ceil(Cypress.$('[data-cy-files-list-tbody] tr').outerHeight()!)
+
+			// sum it up
+			const viewportHeight = outerHeight + beforeHeight + filterHeight + tableHeaderHeight + rows * rowHeight
+			cy.log(`Calculated viewport height: ${viewportHeight} (${outerHeight} + ${beforeHeight} + ${filterHeight} + ${tableHeaderHeight} + ${rows} * ${rowHeight})`)
+			return cy.wrap(viewportHeight)
+		})
+}
diff --git a/cypress/e2e/files/files-renaming.cy.ts b/cypress/e2e/files/files-renaming.cy.ts
index 752e8264ceb..061f987a24e 100644
--- a/cypress/e2e/files/files-renaming.cy.ts
+++ b/cypress/e2e/files/files-renaming.cy.ts
@@ -4,7 +4,7 @@
  */
 
 import type { User } from '@nextcloud/cypress'
-import { getRowForFile, haveValidity, renameFile, triggerActionForFile } from './FilesUtils'
+import { calculateViewportHeight, getRowForFile, haveValidity, renameFile, triggerActionForFile } from './FilesUtils'
 
 describe('files: Rename nodes', { testIsolation: true }, () => {
 	let user: User
@@ -12,7 +12,12 @@ describe('files: Rename nodes', { testIsolation: true }, () => {
 	beforeEach(() => cy.createRandomUser().then(($user) => {
 		user = $user
 
+		// remove welcome file
+		cy.rm(user, '/welcome.txt')
+		// create a file called "file.txt"
 		cy.uploadContent(user, new Blob([]), 'text/plain', '/file.txt')
+
+		// login and visit files app
 		cy.login(user)
 		cy.visit('/apps/files')
 	}))
@@ -116,34 +121,6 @@ describe('files: Rename nodes', { testIsolation: true }, () => {
 			.should('not.exist')
 	})
 
-	/**
-	 * This is a regression test of: https://github.com/nextcloud/server/issues/47438
-	 * The issue was that the renaming state was not reset when the new name moved the file out of the view of the current files list
-	 * due to virtual scrolling the renaming state was not changed then by the UI events (as the component was taken out of DOM before any event handling).
-	 */
-	it('correctly resets renaming state', () => {
-		for (let i = 1; i <= 20; i++) {
-			cy.uploadContent(user, new Blob([]), 'text/plain', `/file${i}.txt`)
-		}
-		cy.viewport(1200, 500) // 500px is smaller then 20 * 50 which is the place that the files take up
-		cy.login(user)
-		cy.visit('/apps/files')
-
-		getRowForFile('file.txt').should('be.visible')
-		// Z so it is shown last
-		renameFile('file.txt', 'zzz.txt')
-		// not visible any longer
-		getRowForFile('zzz.txt').should('not.be.visible')
-		// scroll file list to bottom
-		cy.get('[data-cy-files-list]').scrollTo('bottom')
-		cy.screenshot()
-		// The file is no longer in rename state
-		getRowForFile('zzz.txt')
-			.should('be.visible')
-			.findByRole('textbox', { name: 'Filename' })
-			.should('not.exist')
-	})
-
 	it('cancel renaming on esc press', () => {
 		// All are visible by default
 		getRowForFile('file.txt').should('be.visible')
@@ -182,4 +159,38 @@ describe('files: Rename nodes', { testIsolation: true }, () => {
 			.find('input[type="text"]')
 			.should('not.exist')
 	})
+
+	/**
+	 * This is a regression test of: https://github.com/nextcloud/server/issues/47438
+	 * The issue was that the renaming state was not reset when the new name moved the file out of the view of the current files list
+	 * due to virtual scrolling the renaming state was not changed then by the UI events (as the component was taken out of DOM before any event handling).
+	 */
+	it('correctly resets renaming state', () => {
+		// Create 19 additional files
+		for (let i = 1; i <= 19; i++) {
+			cy.uploadContent(user, new Blob([]), 'text/plain', `/file${i}.txt`)
+		}
+
+		// Calculate and setup a viewport where only the first 4 files are visible, causing 6 rows to be rendered
+		cy.viewport(768, 500)
+		cy.login(user)
+		calculateViewportHeight(4)
+			.then((height) => cy.viewport(768, height))
+
+		cy.visit('/apps/files')
+
+		getRowForFile('file.txt').should('be.visible')
+		// Z so it is shown last
+		renameFile('file.txt', 'zzz.txt')
+		// not visible any longer
+		getRowForFile('zzz.txt').should('not.exist')
+		// scroll file list to bottom
+		cy.get('[data-cy-files-list]').scrollTo('bottom')
+		cy.screenshot()
+		// The file is no longer in rename state
+		getRowForFile('zzz.txt')
+			.should('be.visible')
+			.findByRole('textbox', { name: 'Filename' })
+			.should('not.exist')
+	})
 })
diff --git a/cypress/e2e/files/scrolling.cy.ts b/cypress/e2e/files/scrolling.cy.ts
index c4ca4943a40..13f37f71454 100644
--- a/cypress/e2e/files/scrolling.cy.ts
+++ b/cypress/e2e/files/scrolling.cy.ts
@@ -4,11 +4,13 @@
  */
 
 import type { User } from '@nextcloud/cypress'
-import { getRowForFile } from './FilesUtils'
+import { calculateViewportHeight, enableGridMode, getRowForFile } from './FilesUtils.ts'
+import { beFullyInViewport, notBeFullyInViewport } from '../core-utils.ts'
 
 describe('files: Scrolling to selected file in file list', { testIsolation: true }, () => {
 	const fileIds = new Map<number, string>()
 	let user: User
+	let viewportHeight: number
 
 	before(() => {
 		cy.createRandomUser().then(($user) => {
@@ -19,12 +21,17 @@ describe('files: Scrolling to selected file in file list', { testIsolation: true
 				cy.uploadContent(user, new Blob([]), 'text/plain', `/${i}.txt`)
 					.then((response) => fileIds.set(i, Number.parseInt(response.headers['oc-fileid']).toString()))
 			}
+
+			cy.login(user)
+			cy.viewport(1200, 800)
+			// Calculate height to ensure that those 10 elements can not be rendered in one list (only 6 will fit the screen)
+			calculateViewportHeight(6)
+				.then((height) => { viewportHeight = height })
 		})
 	})
 
 	beforeEach(() => {
-		// Adjust height to ensure that those 10 elements can not be rendered in one list
-		cy.viewport(1200, 6 * 55 /* rows */ + 55 /* table header */ + 50 /* navigation header */ + 50 /* breadcrumbs */ + 46 /* file filters */)
+		cy.viewport(1200, viewportHeight)
 		cy.login(user)
 	})
 
@@ -64,34 +71,36 @@ describe('files: Scrolling to selected file in file list', { testIsolation: true
 				.and(beOverlappedByTableHeader)
 			getRowForFile(`${i + 5}.txt`)
 				.should('exist')
-				.and('be.visible')
 				.and(notBeFullyInViewport)
 		})
 	}
 
-	// this will have half of the footer visible
-	it(`correctly scrolls to row 6`, () => {
+	// this will have half of the footer visible and half of the previous element
+	it('correctly scrolls to row 6', () => {
 		cy.visit(`/apps/files/files/${fileIds.get(6)}`)
 
 		// See file is visible
-		getRowForFile(`6.txt`)
+		getRowForFile('6.txt')
 			.should('be.visible')
 			.and(notBeOverlappedByTableHeader)
 
 		// we expect also element 7,8,9,10 visible
-		getRowForFile(`10.txt`)
+		getRowForFile('10.txt')
 			.should('be.visible')
 		// but not row 5
-		getRowForFile(`5.txt`)
+		getRowForFile('5.txt')
 			.should('exist')
 			.and(beOverlappedByTableHeader)
 		// see footer is only shown partly
 		cy.get('tfoot')
 			.should('exist')
 			.and(notBeFullyInViewport)
+			.contains('10 files')
+			.should('be.visible')
 	})
 
-	// Same kind of tests for partially visible top and bottom
+	// For the last "page" of entries we can not scroll further
+	// so we show all of the last 4 entries
 	for (let i = 7; i <= 10; i++) {
 		it(`correctly scrolls to row ${i}`, () => {
 			cy.visit(`/apps/files/files/${fileIds.get(i)}`)
@@ -101,15 +110,15 @@ describe('files: Scrolling to selected file in file list', { testIsolation: true
 				.should('be.visible')
 				.and(notBeOverlappedByTableHeader)
 
-			// there are only max. 3 rows left so also row 6+ should be visible
-			getRowForFile(`6.txt`)
+			// there are only max. 4 rows left so also row 6+ should be visible
+			getRowForFile('6.txt')
 				.should('be.visible')
-			getRowForFile(`10.txt`)
+			getRowForFile('10.txt')
 				.should('be.visible')
 			// Also the footer is visible
 			cy.get('tfoot')
 				.contains('10 files')
-				.should('be.visible')
+				.should(beFullyInViewport)
 		})
 	}
 })
@@ -117,8 +126,13 @@ describe('files: Scrolling to selected file in file list', { testIsolation: true
 describe('files: Scrolling to selected file in file list (GRID MODE)', { testIsolation: true }, () => {
 	const fileIds = new Map<number, string>()
 	let user: User
+	let viewportHeight: number
 
 	before(() => {
+		cy.wrap(Cypress.automation('remote:debugger:protocol', {
+			command: 'Network.clearBrowserCache',
+		  }))
+
 		cy.createRandomUser().then(($user) => {
 			user = $user
 
@@ -127,21 +141,22 @@ describe('files: Scrolling to selected file in file list (GRID MODE)', { testIso
 				cy.uploadContent(user, new Blob([]), 'text/plain', `/${i}.txt`)
 					.then((response) => fileIds.set(i, Number.parseInt(response.headers['oc-fileid']).toString()))
 			}
+
 			// Set grid mode
 			cy.login(user)
-			cy.intercept('**/apps/files/api/v1/config/grid_view').as('setGridMode')
 			cy.visit('/apps/files')
-			cy.findByRole('button', { name: 'Switch to grid view' })
-				.should('be.visible')
-				.click()
-			cy.wait('@setGridMode')
+			enableGridMode()
+
+			// 768px width will limit the columns to 3
+			cy.viewport(768, 800)
+			// Calculate height to ensure that those 12 elements can not be rendered in one list (only 3 will fit the screen)
+			calculateViewportHeight(3)
+				.then((height) => { viewportHeight = height })
 		})
 	})
 
 	beforeEach(() => {
-		// Adjust height to ensure that those 12 files can not be rendered in one list
-		// 768px width will limit the columns to 3
-		cy.viewport(768, 3 * 246 /* rows */ + 55 /* table header */ + 50 /* navigation header */ + 50 /* breadcrumbs */ + 46 /* file filters */)
+		cy.viewport(768, viewportHeight)
 		cy.login(user)
 	})
 
@@ -155,13 +170,13 @@ describe('files: Scrolling to selected file in file list (GRID MODE)', { testIso
 				getRowForFile(`${j}.txt`)
 					.should('be.visible')
 				// we expect also the second row to be visible
-				getRowForFile(`${j+3}.txt`)
+				getRowForFile(`${j + 3}.txt`)
 					.should('be.visible')
 				// Because there is no half row on top we also see the third row
-				getRowForFile(`${j+6}.txt`)
+				getRowForFile(`${j + 6}.txt`)
 					.should('be.visible')
 				// But not the forth row
-				getRowForFile(`${j+9}.txt`)
+				getRowForFile(`${j + 9}.txt`)
 					.should('exist')
 					.and(notBeFullyInViewport)
 			}
@@ -215,8 +230,9 @@ describe('files: Scrolling to selected file in file list (GRID MODE)', { testIso
 
 			// see footer is only shown partly
 			cy.get('tfoot')
-				.should('exist')
-				.and(notBeFullyInViewport)
+				.should(notBeFullyInViewport)
+				.contains('span', '12 files')
+				.should('be.visible')
 		})
 	}
 
@@ -237,44 +253,40 @@ describe('files: Scrolling to selected file in file list (GRID MODE)', { testIso
 
 			// see footer is shown
 			cy.get('tfoot')
-				.should('be.visible')
+				.contains('.files-list__row-name', '12 files')
+				.should(beFullyInViewport)
 		})
 	}
 })
 
 /// Some helpers
 
-function notBeOverlappedByTableHeader($el: JQuery<HTMLElement>) {
-	return beOverlappedByTableHeader($el, false)
-}
-
+/**
+ * Assert that an element is overlapped by the table header
+ * @param $el The element
+ * @param expected if it should be overlapped or NOT
+ */
 function beOverlappedByTableHeader($el: JQuery<HTMLElement>, expected = true) {
 	const headerRect = Cypress.$('thead').get(0)!.getBoundingClientRect()
 	const elementRect = $el.get(0)!.getBoundingClientRect()
-	const overlap = !(headerRect.right < elementRect.left || 
-		headerRect.left > elementRect.right || 
-		headerRect.bottom < elementRect.top || 
-		headerRect.top > elementRect.bottom)
+	const overlap = !(headerRect.right < elementRect.left
+		|| headerRect.left > elementRect.right
+		|| headerRect.bottom < elementRect.top
+		|| headerRect.top > elementRect.bottom)
 
 	if (expected) {
+		// eslint-disable-next-line no-unused-expressions
 		expect(overlap, 'Overlapped by table header').to.be.true
 	} else {
+		// eslint-disable-next-line no-unused-expressions
 		expect(overlap, 'Not overlapped by table header').to.be.false
 	}
 }
 
-function beFullyInViewport($el: JQuery<HTMLElement>, expected = true) {
-	const { top, left, bottom, right } = $el.get(0)!.getBoundingClientRect()
-	const { innerHeight, innerWidth } = window
-	const fullyVisible = top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth
-
-	if (expected) {
-		expect(fullyVisible, 'Fully within viewport').to.be.true
-	} else {
-		expect(fullyVisible, 'Not fully within viewport').to.be.false
-	}
-}
-
-function notBeFullyInViewport($el: JQuery<HTMLElement>) {
-	return beFullyInViewport($el, false)
+/**
+ * Assert that an element is not overlapped by the table header
+ * @param $el The element
+ */
+function notBeOverlappedByTableHeader($el: JQuery<HTMLElement>) {
+	return beOverlappedByTableHeader($el, false)
 }