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68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package diff
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import (
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"bytes"
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"fmt"
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"testing"
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"github.com/neilotoole/sq/cli/output"
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"github.com/neilotoole/sq/cli/diff/internal/go-udiff"
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"github.com/neilotoole/sq/cli/diff/internal/go-udiff/myers"
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"github.com/stretchr/testify/require"
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)
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//nolint:lll,unused
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const (
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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"
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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"
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alphaShortBefore = "a: 1\nb: 2\nc: 3\nd: 4\ne: 5\nf: 6\ng: 7\nh: 8\ni: 9\nj: 10\n"
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alphaShortAfter = "a: 1\nb: 2\nc: 3\nd: 4\ne: 5\nf: X\ng: 7\nh: 8\ni: 9\nj: 10\n"
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numLines = 3
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)
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func TestMyers(t *testing.T) {
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const left, right = alphaShortBefore, alphaShortAfter
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edits := myers.ComputeEdits(left, right)
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result, err := udiff.ToUnified(
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"before",
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"after",
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left,
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edits,
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numLines,
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)
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require.NoError(t, err)
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buf := &bytes.Buffer{}
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err = Print(buf, output.NewPrinting(), "diff before after", result)
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require.NoError(t, err)
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t.Logf("\n" + buf.String())
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}
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func TestMyersDiff(t *testing.T) {
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const left, right = alphaShortBefore, alphaShortAfter
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edits := myers.ComputeEdits(left, right)
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dff, err := udiff.ToUnifiedDiff(
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"before",
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"after",
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left,
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edits,
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numLines,
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)
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require.NoError(t, err)
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buf := &bytes.Buffer{}
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for _, h := range dff.Hunks {
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fmt.Fprintf(buf, "hunk: -%d, +%d\n", h.FromLine, h.ToLine)
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for _, l := range h.Lines {
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fmt.Fprintf(buf, "%s %q\n", l.Kind, l.Content)
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}
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}
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t.Log("\n" + buf.String())
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}
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