77 lines
2.9 KiB
Swift
77 lines
2.9 KiB
Swift
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import XCTest
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@testable import SaplingEditor
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final class EditorScrollStabilityTests: XCTestCase {
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func testRenderMetricsCountScrollRestorationDuringDirtyEdit() {
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var instrumentation = EditorInstrumentationSnapshot()
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instrumentation.recordRenderPass(EditorRenderPassMetric(
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reason: .sourceChange,
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durationMilliseconds: 0.4,
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characterCount: 1_200,
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lineCount: 80,
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dirtyLineCount: 3,
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activeLineIndex: 40,
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isFullRender: false,
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restoredScrollPosition: true
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))
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XCTAssertEqual(instrumentation.renderPassCount, 1)
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XCTAssertEqual(instrumentation.fullRenderCount, 0)
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XCTAssertEqual(instrumentation.totalDirtyLineCount, 3)
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XCTAssertEqual(instrumentation.lastDirtyLineCount, 3)
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XCTAssertEqual(instrumentation.scrollRestorationCount, 1)
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}
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func testRapidNavigationSchedulesOnlyOldAndNewActiveLines() {
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let source = (1...500).map { "Line \($0)" }.joined(separator: "\n")
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let firstJump = EditorDirtyLineInvalidator.plan(
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previousText: source,
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currentText: source,
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previousActiveLineIndex: 10,
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currentActiveLineIndex: 250
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)
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let secondJump = EditorDirtyLineInvalidator.plan(
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previousText: source,
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currentText: source,
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previousActiveLineIndex: 250,
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currentActiveLineIndex: 490
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)
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XCTAssertEqual(firstJump.dirtyLineIndexes, [10, 250])
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XCTAssertEqual(secondJump.dirtyLineIndexes, [250, 490])
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XCTAssertFalse(firstJump.isFullRender)
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XCTAssertFalse(secondJump.isFullRender)
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}
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func testEditingWhileScrolledDoesNotRequireFullRender() {
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let previous = (1...200).map { "Line \($0)" }.joined(separator: "\n")
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var lines = previous.components(separatedBy: "\n")
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lines[120] = "Line 121 edited while viewport is away from the top"
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let current = lines.joined(separator: "\n")
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let plan = EditorDirtyLineInvalidator.plan(
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previousText: previous,
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currentText: current,
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previousActiveLineIndex: 120,
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currentActiveLineIndex: 120
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)
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var instrumentation = EditorInstrumentationSnapshot()
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instrumentation.recordRenderPass(EditorRenderPassMetric(
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reason: plan.reason,
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durationMilliseconds: 0.5,
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characterCount: current.utf16.count,
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lineCount: 200,
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dirtyLineCount: plan.dirtyLineCount,
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activeLineIndex: 120,
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isFullRender: plan.isFullRender,
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restoredScrollPosition: true
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))
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XCTAssertEqual(plan.reason, .sourceChange)
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XCTAssertFalse(plan.isFullRender)
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XCTAssertEqual(plan.dirtyLineIndexes, [119, 120, 121])
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XCTAssertEqual(instrumentation.scrollRestorationCount, 1)
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}
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}
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