std/src/text/diff_test.nv - main - nv-lang/nova

// SPDX-License-Identifier: MIT OR Apache-2.0
// std/text/diff_test.nv — публичный контракт Diff.compute/format (Myers diff).

module text.diff_test

import std.text.diff.{Diff, DiffOp}

test "diff: identical arrays" {
    ro ops = Diff.compute(["a", "b", "c"], ["a", "b", "c"])
    for op in ops {
        match op {
            DiffOp.Equal(_) => ()
            _               => assert(false)
        }
    }
}

test "diff: complete change" {
    ro ops = Diff.compute(["a"], ["b"])
    // Должна быть Delete("a") + Insert("b")
    mut has_delete = false
    mut has_insert = false
    for op in ops {
        match op {
            DiffOp.Delete("a") => { has_delete = true }
            DiffOp.Insert("b") => { has_insert = true }
            _                  => ()
        }
    }
    assert(has_delete)
    assert(has_insert)
}

test "diff: insertion в середине" {
    ro ops = Diff.compute(["a", "c"], ["a", "b", "c"])
    mut has_insert_b = false
    for op in ops {
        match op {
            DiffOp.Insert("b") => { has_insert_b = true }
            _                  => ()
        }
    }
    assert(has_insert_b)
}

test "diff: deletion в середине" {
    ro ops = Diff.compute(["a", "b", "c"], ["a", "c"])
    mut has_delete_b = false
    for op in ops {
        match op {
            DiffOp.Delete("b") => { has_delete_b = true }
            _                  => ()
        }
    }
    assert(has_delete_b)
}