package diffdoc import ( "bytes" "fmt" "testing" "github.com/stretchr/testify/require" udiff "github.com/neilotoole/sq/libsq/core/diffdoc/internal/go-udiff" "github.com/neilotoole/sq/libsq/core/diffdoc/internal/go-udiff/myers" ) //nolint:lll,unused const ( alphaBefore = "a: 1\nb: 2\nc: 3\nd: 4\ne: 5\nf: 6\ng: 7\nh: 8\ni: 9\nj: 10\nk: 11\nl: 12\nm: 13\nn: 14\no: 15\np: 16\nq: 17\nr: 18\ns: 19\nt: 20\nu: 21\nv: 22\nw: 23\nx: 24\ny: 25\nz: 26\n" alphaAfter = "a: 1\nb: 2\nc: 3\nd: 4\ne: 5\nf: 6\ng: X\nh: 8\ni: 9\nj: 10\nk: 11\nl: 12\nm: 13\nn: 14\no: 15\np: 16\nq: 17\nr: 18\ns: 19\nt: 20\nhuzzah\nu: 21\nv: 22\nw: 23\nx: 24\ny: 25\nz: 26\n" alphaShortBefore = "a: 1\nb: 2\nc: 3\nd: 4\ne: 5\nf: 6\ng: 7\nh: 8\ni: 9\nj: 10\n" alphaShortAfter = "a: 1\nb: 2\nc: 3\nd: 4\ne: 5\nf: X\ng: 7\nh: 8\ni: 9\nj: 10\n" numLines = 3 ) func TestMyersDiff(t *testing.T) { const left, right = alphaShortBefore, alphaShortAfter edits := myers.ComputeEdits(left, right) dff, err := udiff.ToUnifiedDiff( "before", "after", left, edits, numLines, ) require.NoError(t, err) buf := &bytes.Buffer{} for _, h := range dff.Hunks { fmt.Fprintf(buf, "Hunk: -%d, +%d\n", h.FromLine, h.ToLine) for _, l := range h.Lines { fmt.Fprintf(buf, "%s %q\n", l.Kind, l.Content) } } t.Log("\n" + buf.String()) }