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https://github.com/golang/go
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2f43c6d1a2
Change span to hide its fields and have validating accessors This catches the cases where either the offset or the position is being used when it was not set. It also normalizes the forms as the API now controls them, and allows us to simplify some of the logic. The converters are now allowed to return an error, which lets us cleanly propagate bad cases. The lsp was then converted to the new format, and also had some error checking of its own added on the top. All this allowed me to find and fix a few issues, most notably a case where the wrong column mapper was being used during the conversion of definition results. Change-Id: Iebdf8901e8269b28aaef60caf76574baa25c46d4 Reviewed-on: https://go-review.googlesource.com/c/tools/+/167858 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package span_test
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import (
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"testing"
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"golang.org/x/tools/internal/span"
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)
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// TestUTF16 tests the conversion of column information between the native
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// byte offset and the utf16 form.
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func TestUTF16(t *testing.T) {
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var input = []byte(`
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𐐀23456789
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1𐐀3456789
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12𐐀456789
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123𐐀56789
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1234𐐀6789
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12345𐐀789
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123456𐐀89
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1234567𐐀9
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12345678𐐀
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`[1:])
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c := span.NewContentConverter("test", input)
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for line := 1; line <= 9; line++ {
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runeColumn, runeChr := 0, 0
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for chr := 1; chr <= 9; chr++ {
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switch {
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case chr <= line:
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runeChr = chr
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runeColumn = chr
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case chr == line+1:
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runeChr = chr - 1
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runeColumn = chr - 1
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default:
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runeChr = chr
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runeColumn = chr + 2
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}
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p := span.NewPoint(line, runeColumn, (line-1)*13+(runeColumn-1))
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// check conversion to utf16 format
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gotChr, err := span.ToUTF16Column(p, input)
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if err != nil {
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t.Error(err)
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}
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if runeChr != gotChr {
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t.Errorf("ToUTF16Column(%v): expected %v, got %v", p, runeChr, gotChr)
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}
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offset, err := c.ToOffset(p.Line(), p.Column())
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if err != nil {
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t.Error(err)
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}
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if p.Offset() != offset {
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t.Errorf("ToOffset(%v,%v): expected %v, got %v", p.Line(), p.Column(), p.Offset(), offset)
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}
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// and check the conversion back
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lineStart := span.NewPoint(p.Line(), 1, p.Offset()-(p.Column()-1))
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gotPoint, err := span.FromUTF16Column(lineStart, chr, input)
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if err != nil {
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t.Error(err)
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}
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if p != gotPoint {
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t.Errorf("FromUTF16Column(%v,%v): expected %v, got %v", p.Line(), chr, p, gotPoint)
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}
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}
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}
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}
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