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54 lines
1.3 KiB
Swift
54 lines
1.3 KiB
Swift
final class LocationTests: XCTestCase {
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func testExplorationOfATermBeginsAtTheExploredTerm() {
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assert(term.explore().it, ==, term)
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}
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func testCannotMoveUpwardsAtTheStartOfAnExploration() {
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assert(term.explore().up?.it, ==, nil)
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}
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func testCannotMoveSidewaysAtTheStartOfAnExploration() {
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assert(term.explore().left?.it, ==, nil)
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assert(term.explore().right?.it, ==, nil)
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}
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func testCannotMoveDownwardsFromLeaves() {
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assert(leafA.explore().down?.it, ==, nil)
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}
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func testCanMoveDownwardsIntoBranches() {
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assert(term.explore().down?.it, ==, leafA)
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}
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func testCanMoveBackUpwards() {
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assert(term.explore().down?.up?.it, ==, term)
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}
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func testCannotMoveLeftwardsFromFirstChildOfBranch() {
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assert(term.explore().down?.left?.it, ==, nil)
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}
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func testCanMoveRightwardsFromLeftmostChildOfLongBranch() {
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assert(term.explore().down?.right?.it, ==, leafB)
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}
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}
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private let leafA = Cofree(1, .Leaf("a string"))
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private let leafB = Cofree(2, .Leaf("b string"))
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private let innerLeafA = Cofree(4, .Leaf("a nested string"))
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private let keyed = Cofree(3, .Keyed([
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"a": innerLeafA,
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"b": Cofree(5, .Leaf("b nested string")),
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]))
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private let term: Cofree<String, Int> = Cofree(0, .Indexed([
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leafA,
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leafB,
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keyed,
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]))
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import Assertions
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@testable import Doubt
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import XCTest
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