+++ /dev/null
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package span_test
-
-import (
- "strings"
- "testing"
-
- "golang.org/x/tools/internal/span"
-)
-
-// The funny character below is 4 bytes long in UTF-8; two UTF-16 code points
-var funnyString = []byte("š23\nš45")
-
-var toUTF16Tests = []struct {
- scenario string
- input []byte
- line int // 1-indexed count
- col int // 1-indexed byte position in line
- offset int // 0-indexed byte offset into input
- resUTF16col int // 1-indexed UTF-16 col number
- pre string // everything before the cursor on the line
- post string // everything from the cursor onwards
- err string // expected error string in call to ToUTF16Column
- issue *bool
-}{
- {
- scenario: "cursor missing content",
- input: nil,
- err: "ToUTF16Column: point is missing position",
- },
- {
- scenario: "cursor missing position",
- input: funnyString,
- line: -1,
- col: -1,
- err: "ToUTF16Column: point is missing position",
- },
- {
- scenario: "cursor missing offset",
- input: funnyString,
- line: 1,
- col: 1,
- offset: -1,
- err: "ToUTF16Column: point is missing offset",
- },
- {
- scenario: "zero length input; cursor at first col, first line",
- input: []byte(""),
- line: 1,
- col: 1,
- offset: 0,
- resUTF16col: 1,
- },
- {
- scenario: "cursor before funny character; first line",
- input: funnyString,
- line: 1,
- col: 1,
- offset: 0,
- resUTF16col: 1,
- pre: "",
- post: "š23",
- },
- {
- scenario: "cursor after funny character; first line",
- input: funnyString,
- line: 1,
- col: 5, // 4 + 1 (1-indexed)
- offset: 4,
- resUTF16col: 3, // 2 + 1 (1-indexed)
- pre: "š",
- post: "23",
- },
- {
- scenario: "cursor after last character on first line",
- input: funnyString,
- line: 1,
- col: 7, // 4 + 1 + 1 + 1 (1-indexed)
- offset: 6, // 4 + 1 + 1
- resUTF16col: 5, // 2 + 1 + 1 + 1 (1-indexed)
- pre: "š23",
- post: "",
- },
- {
- scenario: "cursor before funny character; second line",
- input: funnyString,
- line: 2,
- col: 1,
- offset: 7, // length of first line
- resUTF16col: 1,
- pre: "",
- post: "š45",
- },
- {
- scenario: "cursor after funny character; second line",
- input: funnyString,
- line: 1,
- col: 5, // 4 + 1 (1-indexed)
- offset: 11, // 7 (length of first line) + 4
- resUTF16col: 3, // 2 + 1 (1-indexed)
- pre: "š",
- post: "45",
- },
- {
- scenario: "cursor after last character on second line",
- input: funnyString,
- line: 2,
- col: 7, // 4 + 1 + 1 + 1 (1-indexed)
- offset: 13, // 7 (length of first line) + 4 + 1 + 1
- resUTF16col: 5, // 2 + 1 + 1 + 1 (1-indexed)
- pre: "š45",
- post: "",
- },
- {
- scenario: "cursor beyond end of file",
- input: funnyString,
- line: 2,
- col: 8, // 4 + 1 + 1 + 1 + 1 (1-indexed)
- offset: 14, // 4 + 1 + 1 + 1
- err: "ToUTF16Column: offsets 7-14 outside file contents (13)",
- },
-}
-
-var fromUTF16Tests = []struct {
- scenario string
- input []byte
- line int // 1-indexed line number (isn't actually used)
- offset int // 0-indexed byte offset to beginning of line
- utf16col int // 1-indexed UTF-16 col number
- resCol int // 1-indexed byte position in line
- resOffset int // 0-indexed byte offset into input
- pre string // everything before the cursor on the line
- post string // everything from the cursor onwards
- err string // expected error string in call to ToUTF16Column
-}{
- {
- scenario: "zero length input; cursor at first col, first line",
- input: []byte(""),
- line: 1,
- offset: 0,
- utf16col: 1,
- resCol: 1,
- resOffset: 0,
- pre: "",
- post: "",
- },
- {
- scenario: "missing offset",
- input: funnyString,
- line: 1,
- offset: -1,
- err: "FromUTF16Column: point is missing offset",
- },
- {
- scenario: "cursor before funny character",
- input: funnyString,
- line: 1,
- utf16col: 1,
- resCol: 1,
- resOffset: 0,
- pre: "",
- post: "š23",
- },
- {
- scenario: "cursor after funny character",
- input: funnyString,
- line: 1,
- utf16col: 3,
- resCol: 5,
- resOffset: 4,
- pre: "š",
- post: "23",
- },
- {
- scenario: "cursor after last character on line",
- input: funnyString,
- line: 1,
- utf16col: 5,
- resCol: 7,
- resOffset: 6,
- pre: "š23",
- post: "",
- },
- {
- scenario: "cursor beyond last character on line",
- input: funnyString,
- line: 1,
- offset: 0,
- utf16col: 6,
- resCol: 7,
- resOffset: 6,
- pre: "š23",
- post: "",
- },
- {
- scenario: "cursor before funny character; second line",
- input: funnyString,
- line: 2,
- offset: 7, // length of first line
- utf16col: 1,
- resCol: 1,
- resOffset: 7,
- pre: "",
- post: "š45",
- },
- {
- scenario: "cursor after funny character; second line",
- input: funnyString,
- line: 2,
- offset: 7, // length of first line
- utf16col: 3, // 2 + 1 (1-indexed)
- resCol: 5, // 4 + 1 (1-indexed)
- resOffset: 11, // 7 (length of first line) + 4
- pre: "š",
- post: "45",
- },
- {
- scenario: "cursor after last character on second line",
- input: funnyString,
- line: 2,
- offset: 7, // length of first line
- utf16col: 5, // 2 + 1 + 1 + 1 (1-indexed)
- resCol: 7, // 4 + 1 + 1 + 1 (1-indexed)
- resOffset: 13, // 7 (length of first line) + 4 + 1 + 1
- pre: "š45",
- post: "",
- },
- {
- scenario: "cursor beyond end of file",
- input: funnyString,
- line: 2,
- offset: 7,
- utf16col: 6, // 2 + 1 + 1 + 1 + 1(1-indexed)
- resCol: 8, // 4 + 1 + 1 + 1 + 1 (1-indexed)
- resOffset: 14, // 7 (length of first line) + 4 + 1 + 1 + 1
- err: "FromUTF16Column: chr goes beyond the content",
- },
- {
- scenario: "offset beyond end of file",
- input: funnyString,
- line: 2,
- offset: 14,
- utf16col: 2,
- err: "FromUTF16Column: offset (14) greater than length of content (13)",
- },
-}
-
-func TestToUTF16(t *testing.T) {
- for _, e := range toUTF16Tests {
- t.Run(e.scenario, func(t *testing.T) {
- if e.issue != nil && !*e.issue {
- t.Skip("expected to fail")
- }
- p := span.NewPoint(e.line, e.col, e.offset)
- got, err := span.ToUTF16Column(p, e.input)
- if err != nil {
- if err.Error() != e.err {
- t.Fatalf("expected error %v; got %v", e.err, err)
- }
- return
- }
- if e.err != "" {
- t.Fatalf("unexpected success; wanted %v", e.err)
- }
- if got != e.resUTF16col {
- t.Fatalf("expected result %v; got %v", e.resUTF16col, got)
- }
- pre, post := getPrePost(e.input, p.Offset())
- if string(pre) != e.pre {
- t.Fatalf("expected #%d pre %q; got %q", p.Offset(), e.pre, pre)
- }
- if string(post) != e.post {
- t.Fatalf("expected #%d, post %q; got %q", p.Offset(), e.post, post)
- }
- })
- }
-}
-
-func TestFromUTF16(t *testing.T) {
- for _, e := range fromUTF16Tests {
- t.Run(e.scenario, func(t *testing.T) {
- p := span.NewPoint(e.line, 1, e.offset)
- p, err := span.FromUTF16Column(p, e.utf16col, []byte(e.input))
- if err != nil {
- if err.Error() != e.err {
- t.Fatalf("expected error %v; got %v", e.err, err)
- }
- return
- }
- if e.err != "" {
- t.Fatalf("unexpected success; wanted %v", e.err)
- }
- if p.Column() != e.resCol {
- t.Fatalf("expected resulting col %v; got %v", e.resCol, p.Column())
- }
- if p.Offset() != e.resOffset {
- t.Fatalf("expected resulting offset %v; got %v", e.resOffset, p.Offset())
- }
- pre, post := getPrePost(e.input, p.Offset())
- if string(pre) != e.pre {
- t.Fatalf("expected #%d pre %q; got %q", p.Offset(), e.pre, pre)
- }
- if string(post) != e.post {
- t.Fatalf("expected #%d post %q; got %q", p.Offset(), e.post, post)
- }
- })
- }
-}
-
-func getPrePost(content []byte, offset int) (string, string) {
- pre, post := string(content)[:offset], string(content)[offset:]
- if i := strings.LastIndex(pre, "\n"); i >= 0 {
- pre = pre[i+1:]
- }
- if i := strings.IndexRune(post, '\n'); i >= 0 {
- post = post[:i]
- }
- return pre, post
-}
projects / dotfiles / .git / blobdiff