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+Before:
+ runtime autoload/ale/code_action.vim
+ runtime autoload/ale/util.vim
+
+ let g:file1 = tempname()
+ let g:file2 = tempname()
+ let g:test = {}
+
+ let g:test.create_change = {line, offset, end_line, end_offset, value ->
+ \{
+ \ 'changes': [{
+ \ 'fileName': g:file1,
+ \ 'textChanges': [{
+ \ 'start': {
+ \ 'line': line,
+ \ 'offset': offset,
+ \ },
+ \ 'end': {
+ \ 'line': end_line,
+ \ 'offset': end_offset,
+ \ },
+ \ 'newText': value,
+ \ }],
+ \ }]
+ \}}
+
+ function! WriteFileAndEdit() abort
+ let g:test.text = [
+ \ 'class Name {',
+ \ ' value: string',
+ \ '}',
+ \]
+ call writefile(g:test.text, g:file1, 'S')
+ execute 'edit ' . g:file1
+ endfunction!
+
+After:
+ " Close the extra buffers if we opened it.
+ if bufnr(g:file1) != -1
+ execute ':bp | :bd ' . bufnr(g:file1)
+ endif
+ if bufnr(g:file2) != -1
+ execute ':bp | :bd ' . bufnr(g:file2)
+ endif
+
+ if filereadable(g:file1)
+ call delete(g:file1)
+ endif
+ if filereadable(g:file2)
+ call delete(g:file2)
+ endif
+
+ unlet g:file1
+ unlet g:file2
+ unlet g:test
+ delfunction WriteFileAndEdit
+
+ runtime autoload/ale/code_action.vim
+ runtime autoload/ale/util.vim
+
+
+Execute(It should modify and save multiple files):
+ call writefile([
+ \ 'class Name {',
+ \ ' value: string',
+ \ '}',
+ \ '',
+ \ 'class B {',
+ \ ' constructor(readonly a: Name) {}',
+ \ '}'
+ \], g:file1, 'S')
+ call writefile([
+ \ 'import A from "A"',
+ \ 'import {',
+ \ ' B,',
+ \ ' C,',
+ \ '} from "module"',
+ \ 'import D from "D"',
+ \], g:file2, 'S')
+
+ call ale#code_action#HandleCodeAction({
+ \ 'changes': [{
+ \ 'fileName': g:file1,
+ \ 'textChanges': [{
+ \ 'start': {
+ \ 'line': 1,
+ \ 'offset': 7,
+ \ },
+ \ 'end': {
+ \ 'line': 1,
+ \ 'offset': 11,
+ \ },
+ \ 'newText': 'Value',
+ \ }, {
+ \ 'start': {
+ \ 'line': 6,
+ \ 'offset': 27,
+ \ },
+ \ 'end': {
+ \ 'line': 6,
+ \ 'offset': 31,
+ \ },
+ \ 'newText': 'Value',
+ \ }],
+ \ }, {
+ \ 'fileName': g:file2,
+ \ 'textChanges': [{
+ \ 'start': {
+ \ 'line': 2,
+ \ 'offset': 1,
+ \ },
+ \ 'end': {
+ \ 'line': 6,
+ \ 'offset': 1,
+ \ },
+ \ 'newText': "import {A, B} from 'module'\n\n",
+ \ }]
+ \ }],
+ \})
+
+ AssertEqual [
+ \ 'class Value {',
+ \ ' value: string',
+ \ '}',
+ \ '',
+ \ 'class B {',
+ \ ' constructor(readonly a: Value) {}',
+ \ '}',
+ \ '',
+ \], readfile(g:file1, 'b')
+
+ AssertEqual [
+ \ 'import A from "A"',
+ \ 'import {A, B} from ''module''',
+ \ '',
+ \ 'import D from "D"',
+ \ '',
+ \], readfile(g:file2, 'b')
+
+
+Execute(Beginning of file can be modified):
+ let g:test.text = [
+ \ 'class Name {',
+ \ ' value: string',
+ \ '}',
+ \]
+ call writefile(g:test.text, g:file1, 'S')
+
+ call ale#code_action#HandleCodeAction({
+ \ 'changes': [{
+ \ 'fileName': g:file1,
+ \ 'textChanges': [{
+ \ 'start': {
+ \ 'line': 1,
+ \ 'offset': 1,
+ \ },
+ \ 'end': {
+ \ 'line': 1,
+ \ 'offset': 1,
+ \ },
+ \ 'newText': "type A: string\ntype B: number\n",
+ \ }],
+ \ }]
+ \})
+
+ AssertEqual [
+ \ 'type A: string',
+ \ 'type B: number',
+ \] + g:test.text + [''], readfile(g:file1, 'b')
+
+
+Execute(End of file can be modified):
+ let g:test.text = [
+ \ 'class Name {',
+ \ ' value: string',
+ \ '}',
+ \]
+ call writefile(g:test.text, g:file1, 'S')
+
+ call ale#code_action#HandleCodeAction({
+ \ 'changes': [{
+ \ 'fileName': g:file1,
+ \ 'textChanges': [{
+ \ 'start': {
+ \ 'line': 4,
+ \ 'offset': 1,
+ \ },
+ \ 'end': {
+ \ 'line': 4,
+ \ 'offset': 1,
+ \ },
+ \ 'newText': "type A: string\ntype B: number\n",
+ \ }],
+ \ }]
+ \})
+
+ AssertEqual g:test.text + [
+ \ 'type A: string',
+ \ 'type B: number',
+ \ '',
+ \], readfile(g:file1, 'b')
+
+
+Execute(Current buffer contents will be reloaded):
+ let g:test.text = [
+ \ 'class Name {',
+ \ ' value: string',
+ \ '}',
+ \]
+ call writefile(g:test.text, g:file1, 'S')
+
+ execute 'edit ' . g:file1
+ let g:test.buffer = bufnr(g:file1)
+
+ call ale#code_action#HandleCodeAction({
+ \ 'changes': [{
+ \ 'fileName': g:file1,
+ \ 'textChanges': [{
+ \ 'start': {
+ \ 'line': 1,
+ \ 'offset': 1,
+ \ },
+ \ 'end': {
+ \ 'line': 1,
+ \ 'offset': 1,
+ \ },
+ \ 'newText': "type A: string\ntype B: number\n",
+ \ }],
+ \ }]
+ \})
+
+ AssertEqual [
+ \ 'type A: string',
+ \ 'type B: number',
+ \] + g:test.text + [''], readfile(g:file1, 'b')
+
+ AssertEqual [
+ \ 'type A: string',
+ \ 'type B: number',
+ \] + g:test.text, getbufline(g:test.buffer, 1, '$')
+
+
+# Tests for cursor repositioning. In comments `=` designates change range, and
+# `C` cursor position
+
+# C ===
+Execute(Cursor will not move when it is before text change):
+ call WriteFileAndEdit()
+ let g:test.changes = g:test.create_change(2, 3, 2, 8, 'value2')
+
+ call setpos('.', [0, 1, 1, 0])
+ call ale#code_action#HandleCodeAction(g:test.changes)
+ AssertEqual [1, 1], getpos('.')[1:2]
+
+ call setpos('.', [0, 2, 2, 0])
+ call ale#code_action#HandleCodeAction(g:test.changes)
+ AssertEqual [2, 2], getpos('.')[1:2]
+
+# ====C====
+Execute(Cursor column will move to the change end when cursor between start/end):
+ let g:test.changes = g:test.create_change(2, 3, 2, 8, 'value2')
+
+ for r in range(3, 8)
+ call WriteFileAndEdit()
+ call setpos('.', [0, 2, r, 0])
+ AssertEqual ' value: string', getline('.')
+ call ale#code_action#HandleCodeAction(g:test.changes)
+ AssertEqual ' value2: string', getline('.')
+ AssertEqual [2, 9], getpos('.')[1:2]
+ endfor
+
+
+# ====C
+Execute(Cursor column will move back when new text is shorter):
+ call WriteFileAndEdit()
+ call setpos('.', [0, 2, 8, 0])
+ AssertEqual ' value: string', getline('.')
+ call ale#code_action#HandleCodeAction(g:test.create_change(2, 3, 2, 8, 'val'))
+ AssertEqual ' val: string', getline('.')
+ AssertEqual [2, 6], getpos('.')[1:2]
+
+
+# ==== C
+Execute(Cursor column will move forward when new text is longer):
+ call WriteFileAndEdit()
+
+ call setpos('.', [0, 2, 8, 0])
+ AssertEqual ' value: string', getline('.')
+ call ale#code_action#HandleCodeAction(g:test.create_change(2, 3, 2, 8, 'longValue'))
+ AssertEqual ' longValue: string', getline('.')
+ AssertEqual [2, 12], getpos('.')[1:2]
+
+# =========
+# =
+# C
+Execute(Cursor line will move when updates are happening on lines above):
+ call WriteFileAndEdit()
+ call setpos('.', [0, 3, 1, 0])
+ AssertEqual '}', getline('.')
+ call ale#code_action#HandleCodeAction(g:test.create_change(1, 1, 2, 1, "test\ntest\n"))
+ AssertEqual '}', getline('.')
+ AssertEqual [4, 1], getpos('.')[1:2]
+
+
+# =========
+# =C
+Execute(Cursor line and column will move when change on lines above and just before cursor column):
+ call WriteFileAndEdit()
+ call setpos('.', [0, 2, 2, 0])
+ AssertEqual ' value: string', getline('.')
+ call ale#code_action#HandleCodeAction(g:test.create_change(1, 1, 2, 1, "test\ntest\n123"))
+ AssertEqual '123 value: string', getline('.')
+ AssertEqual [3, 5], getpos('.')[1:2]
+
+# =========
+# ======C==
+# =
+Execute(Cursor line and column will move at the end of changes):
+ call WriteFileAndEdit()
+ call setpos('.', [0, 2, 10, 0])
+ AssertEqual ' value: string', getline('.')
+ call ale#code_action#HandleCodeAction(g:test.create_change(1, 1, 3, 1, "test\n"))
+ AssertEqual '}', getline('.')
+ AssertEqual [2, 1], getpos('.')[1:2]
+
+# C ==
+# ===
+Execute(Cursor will not move when changes happening on lines >= cursor, but after cursor):
+ call WriteFileAndEdit()
+ call setpos('.', [0, 2, 3, 0])
+ AssertEqual ' value: string', getline('.')
+ call ale#code_action#HandleCodeAction(g:test.create_change(2, 10, 3, 1, "number\n"))
+ AssertEqual ' value: number', getline('.')
+ AssertEqual [2, 3], getpos('.')[1:2]