✨ feat(vscode): 代码阅读入口、文件树与预览编辑器

vscode/src/codeReader/editText.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from 'vitest'
 import { toBlockViews } from './blockView'
-import { commonIndent, reindentBlock, replaceLines } from './editText'
+import { blockReplacement, commonIndent, reindentBlock, replaceLines } from './editText'
 import { createTypeScriptAdapter } from './languages/typescript'
 import { readFixture, WASM_DIR, withBlocks } from './testSupport'
 
@@ -44,3 +44,29 @@ describe('行替换', () => {
       expect(replaceLines(source, view.startLine, view.endLine, view.code), view.id).toBe(source)
   })
 })
+
+describe('块内修改写回的替换范围', () => {
+  const doc = ['class A {', '  run() {', '    go()', '  }', '}']
+  const lineAt = (n: number): string => doc[n]
+
+  it('从起始行行首替换到结束行行尾，新文本补回原来的缩进', () => {
+    expect(blockReplacement(lineAt, doc.length, 1, 2, 'run(): void {\n  go(1)')).toEqual({
+      startLine: 1,
+      endLine: 2,
+      endCharacter: 8,
+      text: '  run(): void {\n    go(1)',
+      unchanged: false,
+    })
+  })
+
+  it('改完和原来一样时标记 unchanged', () => {
+    expect(blockReplacement(lineAt, doc.length, 1, 2, 'run() {\n  go()')?.unchanged).toBe(true)
+  })
+
+  it('行号已不在文档里时不替换', () => {
+    expect(blockReplacement(lineAt, doc.length, 3, 5, 'x')).toBeUndefined()
+    expect(blockReplacement(lineAt, doc.length, -1, 0, 'x')).toBeUndefined()
+    expect(blockReplacement(lineAt, doc.length, 2, 1, 'x')).toBeUndefined()
+    expect(blockReplacement(lineAt, doc.length, 0.5, 1, 'x')).toBeUndefined()
+  })
+})