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Test that recursively-copied diffs do not contain patches.

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This commit is contained in:
Rob Rix 2015-10-23 11:49:03 -04:00
parent 11ed1a855d
commit d5bf556cac
1 changed files with 6 additions and 0 deletions
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6
prototype/DoubtTests/DiffTests.swift
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@ -14,6 +14,12 @@ final class DiffTests: XCTestCase {
}
}
func testRecursivelyCopiedDiffsHaveNoPatches() {
property("recursively copying a term into a diff produces no patches") <- forAll { (term: RangedTerm) in
Free.sum(const(1))(Free<Term.Leaf, Term.Annotation, Patch<Term>>(term.term)) == 0
}
}
func testInequalTermsProduceNonIdentityDiffs() {
property("inequal terms produce non-identity diffs") <- forAll { (diff: RangedDiff) in
(!Term.equals(annotation: const(true), leaf: ==)(diff.a.term, diff.b.term)) ==> Diff.sum(const(1))(diff.diff) > 0