195 lines
8.4 KiB
Swift
195 lines
8.4 KiB
Swift
//
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// MTMathUILabelLineWrappingTests.swift
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// SwiftMathTests
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//
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// Tests for line wrapping functionality in MTMathUILabel
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//
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import XCTest
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@testable import SwiftMath
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class MTMathUILabelLineWrappingTests: XCTestCase {
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func testBasicIntrinsicContentSize() {
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let label = MTMathUILabel()
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label.latex = "\\(x + y\\)"
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label.font = MTFontManager.fontManager.defaultFont
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// Debug: check if parsing worked
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XCTAssertNotNil(label.mathList, "Math list should not be nil")
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XCTAssertNil(label.error, "Should have no parsing error, got: \(String(describing: label.error))")
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XCTAssertNotNil(label.font, "Font should not be nil")
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let size = label.intrinsicContentSize
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XCTAssertGreaterThan(size.width, 0, "Width should be greater than 0, got \(size.width)")
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XCTAssertGreaterThan(size.height, 0, "Height should be greater than 0, got \(size.height)")
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}
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func testTextModeIntrinsicContentSize() {
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let label = MTMathUILabel()
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label.latex = "\\(\\text{Hello World}\\)"
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label.font = MTFontManager.fontManager.defaultFont
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label.labelMode = .text
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let size = label.intrinsicContentSize
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XCTAssertGreaterThan(size.width, 0, "Width should be greater than 0, got \(size.width)")
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XCTAssertGreaterThan(size.height, 0, "Height should be greater than 0, got \(size.height)")
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}
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func testLongTextIntrinsicContentSize() {
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let label = MTMathUILabel()
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label.latex = "\\(\\text{Rappelons la conversion : 1 km équivaut à 1000 m.}\\)"
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label.font = MTFontManager.fontManager.defaultFont
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label.labelMode = .text
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let size = label.intrinsicContentSize
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XCTAssertGreaterThan(size.width, 0, "Width should be greater than 0, got \(size.width)")
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XCTAssertGreaterThan(size.height, 0, "Height should be greater than 0, got \(size.height)")
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}
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func testSizeThatFitsWithoutConstraint() {
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let label = MTMathUILabel()
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label.latex = "\\(\\text{Hello World}\\)"
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label.font = MTFontManager.fontManager.defaultFont
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let size = label.sizeThatFits(CGSize.zero)
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XCTAssertGreaterThan(size.width, 0, "Width should be greater than 0, got \(size.width)")
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XCTAssertGreaterThan(size.height, 0, "Height should be greater than 0, got \(size.height)")
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}
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func testSizeThatFitsWithWidthConstraint() {
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let label = MTMathUILabel()
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label.latex = "\\(\\text{Rappelons la conversion : 1 km équivaut à 1000 m.}\\)"
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label.font = MTFontManager.fontManager.defaultFont
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label.labelMode = .text
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// Get unconstrained size first
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let unconstrainedSize = label.sizeThatFits(CGSize.zero)
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XCTAssertGreaterThan(unconstrainedSize.width, 0, "Unconstrained width should be > 0")
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// Test with width constraint (use 300 since longest word might be ~237pt)
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let constrainedSize = label.sizeThatFits(CGSize(width: 300, height: CGFloat.greatestFiniteMagnitude))
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XCTAssertGreaterThan(constrainedSize.width, 0, "Constrained width should be greater than 0, got \(constrainedSize.width)")
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XCTAssertLessThan(constrainedSize.width, unconstrainedSize.width, "Constrained width (\(constrainedSize.width)) should be less than unconstrained (\(unconstrainedSize.width))")
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XCTAssertGreaterThan(constrainedSize.height, 0, "Constrained height should be greater than 0, got \(constrainedSize.height)")
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// When constrained, height should increase when text wraps
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XCTAssertGreaterThan(constrainedSize.height, unconstrainedSize.height,
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"Constrained height (\(constrainedSize.height)) should be > unconstrained (\(unconstrainedSize.height)) when text wraps")
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}
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func testPreferredMaxLayoutWidth() {
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let label = MTMathUILabel()
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label.latex = "\\(\\text{Rappelons la conversion : 1 km équivaut à 1000 m.}\\)"
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label.font = MTFontManager.fontManager.defaultFont
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label.labelMode = .text
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// Get unconstrained size
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let unconstrainedSize = label.intrinsicContentSize
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// Now set preferred max width (use 300 since longest word might be ~237pt)
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label.preferredMaxLayoutWidth = 300
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let constrainedSize = label.intrinsicContentSize
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XCTAssertGreaterThan(constrainedSize.width, 0, "Width should be greater than 0, got \(constrainedSize.width)")
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XCTAssertLessThan(constrainedSize.width, unconstrainedSize.width, "Constrained width (\(constrainedSize.width)) should be < unconstrained (\(unconstrainedSize.width))")
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XCTAssertGreaterThan(constrainedSize.height, unconstrainedSize.height, "Constrained height (\(constrainedSize.height)) should be > unconstrained (\(unconstrainedSize.height)) due to wrapping")
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}
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func testWordBoundaryBreaking() {
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let label = MTMathUILabel()
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label.latex = "\\(\\text{Word1 Word2 Word3 Word4 Word5}\\)"
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label.font = MTFontManager.fontManager.defaultFont
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label.labelMode = .text
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label.preferredMaxLayoutWidth = 150
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let size = label.intrinsicContentSize
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XCTAssertGreaterThan(size.width, 0, "Width should be greater than 0, got \(size.width)")
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XCTAssertGreaterThan(size.height, 0, "Height should be greater than 0, got \(size.height)")
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// Verify it actually uses the layout
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label.frame = CGRect(origin: .zero, size: size)
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#if os(macOS)
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label.layout()
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#else
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label.layoutSubviews()
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#endif
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XCTAssertNotNil(label.displayList, "Display list should be created")
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}
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func testEmptyLatex() {
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let label = MTMathUILabel()
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label.latex = ""
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label.font = MTFontManager.fontManager.defaultFont
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let size = label.intrinsicContentSize
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// Empty latex should still return a valid size (might be zero or minimal)
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XCTAssertGreaterThanOrEqual(size.width, 0, "Width should be >= 0 for empty latex, got \(size.width)")
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XCTAssertGreaterThanOrEqual(size.height, 0, "Height should be >= 0 for empty latex, got \(size.height)")
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}
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func testMathAndTextMixed() {
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let label = MTMathUILabel()
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label.latex = "\\(\\text{Result: } x^2 + y^2 = z^2\\)"
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label.font = MTFontManager.fontManager.defaultFont
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label.labelMode = .text
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let size = label.intrinsicContentSize
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XCTAssertGreaterThan(size.width, 0, "Width should be greater than 0, got \(size.width)")
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XCTAssertGreaterThan(size.height, 0, "Height should be greater than 0, got \(size.height)")
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}
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func testDebugSizeThatFitsWithConstraint() {
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let label = MTMathUILabel()
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label.latex = "\\(\\text{Word1 Word2 Word3 Word4 Word5}\\)"
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label.font = MTFontManager.fontManager.defaultFont
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label.labelMode = .text
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let unconstr = label.sizeThatFits(CGSize.zero)
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let constr = label.sizeThatFits(CGSize(width: 150, height: 999))
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XCTAssertLessThan(constr.width, unconstr.width, "Constrained (\(constr.width)) should be < unconstrained (\(unconstr.width))")
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XCTAssertGreaterThan(constr.height, unconstr.height, "Constrained height (\(constr.height)) should be > unconstrained (\(unconstr.height))")
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}
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func testAccentedCharactersWithLineWrapping() {
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let label = MTMathUILabel()
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// French text with accented characters: è, é, à
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label.latex = "\\(\\text{Rappelons la relation entre kilomètres et mètres.}\\)"
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label.font = MTFontManager.fontManager.defaultFont
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label.labelMode = .text
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// Get unconstrained size
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let unconstrainedSize = label.intrinsicContentSize
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// Set a width constraint that should cause wrapping
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label.preferredMaxLayoutWidth = 250
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let constrainedSize = label.intrinsicContentSize
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// Verify wrapping occurred
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XCTAssertGreaterThan(constrainedSize.width, 0, "Width should be > 0")
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XCTAssertLessThan(constrainedSize.width, unconstrainedSize.width, "Constrained width should be < unconstrained")
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XCTAssertGreaterThan(constrainedSize.height, unconstrainedSize.height, "Height should increase when wrapped")
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// Verify the label can render without errors
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label.frame = CGRect(origin: .zero, size: constrainedSize)
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#if os(macOS)
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label.layout()
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#else
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label.layoutSubviews()
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#endif
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XCTAssertNotNil(label.displayList, "Display list should be created")
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XCTAssertNil(label.error, "Should have no rendering error")
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}
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}
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