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/*
This source file is part of the Swift.org open source project
Copyright (c) 2021 Apple Inc. and the Swift project authors
Licensed under Apache License v2.0 with Runtime Library Exception
See https://swift.org/LICENSE.txt for license information
See https://swift.org/CONTRIBUTORS.txt for Swift project authors
*/
import XCTest
@testable import Markdown
final class HierarchyTests: XCTestCase {
/// Tests that the actual root element is returned
func testRoot() {
let document = Document(parsing: "*OK*")
let leaf = document
.child(at: 0)!
.child(at: 0)!
.child(at: 0) as! Text
XCTAssertTrue(leaf.root.isIdentical(to: document))
}
/// Tests that `root` returns `self` if an element is itself a root.
func testRootSelf() {
let paragraph = Paragraph()
XCTAssert(paragraph.root.isIdentical(to: paragraph))
}
/// Tests that the spine of the tree is updated when changing a leaf.
func testTreeAfterLeafChange() {
let paragraph = Paragraph(Strong(Text("OK")))
let leaf = paragraph.child(at: 0)!.child(at: 0) as! Text
var newLeaf = leaf
newLeaf.string = "Turned over!"
XCTAssertFalse(newLeaf.parent!.isIdentical(to: leaf.parent!))
XCTAssertFalse(newLeaf.parent!.parent!.isIdentical(to: leaf.parent!.parent!))
let expectedDump = """
Paragraph
└─ Strong
└─ Text "Turned over!"
"""
XCTAssertEqual(expectedDump, newLeaf.root.debugDescription())
}
func testTreeAfterMiddleChange() {
let paragraph = Paragraph(Strong(Text("Turned over!")))
let middle = paragraph.child(at: 0) as! Strong
let leaf = paragraph.child(at: 0)!.child(at: 0) as! Text
var newParagraph = paragraph
newParagraph.replaceChildrenInRange(middle.indexInParent..<middle.indexInParent + 1, with: CollectionOfOne(Emphasis(leaf)))
XCTAssertFalse(newParagraph.isIdentical(to: paragraph))
XCTAssertFalse(leaf.isIdentical(to: newParagraph.child(at: 0)!.child(at: 0)!))
let expectedDump = """
Paragraph
└─ Emphasis
└─ Text "Turned over!"
"""
XCTAssertEqual(expectedDump, newParagraph.root.debugDescription())
}
}
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