alexandrev-tibco
f85c746af0
"Cotejo" means nothing outside Spanish and is hard to pronounce elsewhere, so the project is now Kotej: same root, but it reads and sounds the same in English and Spanish. Renamed throughout — engine, targets, bundle ids and the URL scheme, which is now kotej://compare. Icon generated with Codex: two facing panels split by a seam, content lines on each side and one amber line marking a difference — the tool's job at a glance, still legible at 16pt. 34 tests still green; kotej:// verified end to end against the demo JARs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UfhDYRLTpGJSKGP1m3LVJN
82 lines
3.3 KiB
Swift
82 lines
3.3 KiB
Swift
import XCTest
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@testable import KotejEngine
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final class TextDiffTests: XCTestCase {
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func testIdenticalTextIsAllEqual() {
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let rows = TextDiff.rows(left: "uno\ndos\ntres", right: "uno\ndos\ntres")
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XCTAssertEqual(rows.count, 3)
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XCTAssertTrue(rows.allSatisfy { $0.kind == .equal })
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XCTAssertEqual(rows[1].leftNumber, 2)
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XCTAssertEqual(rows[1].rightNumber, 2)
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}
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func testChangedLinePairsUpInsteadOfDeletePlusInsert() {
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let rows = TextDiff.rows(left: "uno\ndos\ntres", right: "uno\nDOS\ntres")
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XCTAssertEqual(rows.count, 3)
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XCTAssertEqual(rows[1].kind, .changed)
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XCTAssertEqual(rows[1].left, "dos")
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XCTAssertEqual(rows[1].right, "DOS")
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// The unchanged lines keep their numbering on both sides.
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XCTAssertEqual(rows[2].leftNumber, 3)
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XCTAssertEqual(rows[2].rightNumber, 3)
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}
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func testInsertionShiftsRightNumbering() {
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let rows = TextDiff.rows(left: "a\nc", right: "a\nb\nc")
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XCTAssertEqual(rows.map(\.kind), [.equal, .added, .equal])
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let added = rows[1]
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XCTAssertNil(added.leftNumber)
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XCTAssertEqual(added.rightNumber, 2)
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XCTAssertEqual(added.right, "b")
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XCTAssertEqual(rows[2].leftNumber, 2)
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XCTAssertEqual(rows[2].rightNumber, 3)
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}
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func testDeletionIsReported() {
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let rows = TextDiff.rows(left: "a\nb\nc", right: "a\nc")
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XCTAssertEqual(rows.map(\.kind), [.equal, .removed, .equal])
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XCTAssertEqual(rows[1].left, "b")
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XCTAssertNil(rows[1].rightNumber)
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}
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func testUnrelatedTextsAreFullyChanged() {
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let rows = TextDiff.rows(left: "uno\ndos", right: "tres\ncuatro")
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XCTAssertTrue(rows.allSatisfy { $0.kind == .changed })
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XCTAssertEqual(rows.count, 2)
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}
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func testHugeFileWithOneChangeStaysCheap() {
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// The common prefix/suffix trim means only the changed middle is aligned,
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// so this must not fall back to the block path despite the size.
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let common = (0..<20_000).map { "line \($0)" }
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var modified = common
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modified[10_000] = "line 10000 CHANGED"
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let rows = TextDiff.rows(left: common.joined(separator: "\n"),
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right: modified.joined(separator: "\n"))
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XCTAssertEqual(rows.count, 20_000)
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let changed = rows.filter { $0.kind != .equal }
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XCTAssertEqual(changed.count, 1)
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XCTAssertEqual(changed.first?.leftNumber, 10_001)
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}
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func testVeryLargeDifferingSectionFallsBackWithoutHanging() {
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let left = (0..<5_000).map { "izquierda \($0)" }.joined(separator: "\n")
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let right = (0..<5_000).map { "derecha \($0)" }.joined(separator: "\n")
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let rows = TextDiff.rows(left: left, right: right, limit: 1_000)
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XCTAssertEqual(rows.count, 5_000)
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XCTAssertTrue(rows.allSatisfy { $0.kind == .changed })
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}
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func testHandlesEmptySides() {
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XCTAssertTrue(TextDiff.rows(left: "", right: "").allSatisfy { $0.kind == .equal })
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let added = TextDiff.rows(left: "", right: "a\nb")
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XCTAssertTrue(added.contains { $0.kind == .added && $0.right == "b" })
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}
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func testNormalisesWindowsLineEndings() {
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let rows = TextDiff.rows(left: "a\r\nb", right: "a\nb")
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XCTAssertTrue(rows.allSatisfy { $0.kind == .equal }, "CRLF alone isn't a change")
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}
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}
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