build: fix compile errors

.vscode/tasks.json

@@ -0,0 +1,16 @@
+{
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "type": "npm",
+      "script": "watch",
+      "group": "build",
+      "problemMatcher": ["$tsc-watch"],
+      "label": "npm: watch",
+      "detail": "tsc -p . -w",
+      "runOptions": {
+        "runOn": "folderOpen",
+      },
+    },
+  ],
+}

src/codeEditor.ts

@@ -1,13 +1,13 @@
 import { BehaviorSubject } from 'rxjs'
 import * as sinon from 'sinon'
 import * as sourcegraph from 'sourcegraph'
-import { assertTypeIsCompatible } from './util'
+import { subTypeOf } from './util'
 
 export const createStubCodeEditor = ({
     document,
     selections = [],
 }: Pick<sourcegraph.CodeEditor, 'document'> & Partial<Pick<sourcegraph.CodeEditor, 'selections'>>) => {
-    const codeEditor = {
+    const codeEditor = subTypeOf<sourcegraph.CodeEditor>()({
         type: 'CodeEditor' as const,
         document,
         get selections(): sourcegraph.Selection[] {
@@ -23,7 +23,6 @@ export const createStubCodeEditor = ({
                 decorations: sourcegraph.TextDocumentDecoration[]
             ): void => undefined
         ),
-    }
-    assertTypeIsCompatible<sourcegraph.CodeEditor>(codeEditor)
+    })
     return codeEditor
 }

src/textDocument.ts

@@ -1,13 +1,13 @@
 import * as sinon from 'sinon'
 import * as sourcegraph from 'sourcegraph'
-import { assertTypeIsCompatible, notImplemented } from './util'
+import { notImplemented, subTypeOf } from './util'
 
 /**
  * Creates a stub TextDocument.
  *
  */
 export const createStubTextDocument = (init: Pick<sourcegraph.TextDocument, 'languageId' | 'text' | 'uri'>) => {
-    const textDocument = {
+    const textDocument = subTypeOf<sourcegraph.TextDocument>()({
         ...init,
         // TODO share the implementation of these methods with the real implementations
         getWordRangeAtPosition: sinon.spy<(position: sourcegraph.Position) => sourcegraph.Range | undefined>(
@@ -17,7 +17,6 @@ export const createStubTextDocument = (init: Pick<sourcegraph.TextDocument, 'lan
         offsetAt: sinon.spy<(position: sourcegraph.Position) => number>(notImplemented),
         positionAt: sinon.spy<(offset: number) => sourcegraph.Position>(notImplemented),
         validateRange: sinon.spy<(range: sourcegraph.Range) => sourcegraph.Range>(notImplemented),
-    }
-    assertTypeIsCompatible<sourcegraph.TextDocument>(textDocument)
+    })
     return textDocument
 }