fix58438: do not delete comments/code following unterminated string completion (#58742)

Co-authored-by: Daniel Rosenwasser <DanielRosenwasser@users.noreply.github.com>

src/services/completions.ts

@@ -1661,7 +1661,7 @@ function createCompletionEntry(
 ): CompletionEntry | undefined {
     let insertText: string | undefined;
     let filterText: string | undefined;
-    let replacementSpan = getReplacementSpanForContextToken(replacementToken);
+    let replacementSpan = getReplacementSpanForContextToken(replacementToken, position);
     let data: CompletionEntryData | undefined;
     let isSnippet: true | undefined;
     let source = getSourceFromOrigin(origin);

src/services/stringCompletions.ts

@@ -223,7 +223,7 @@ function convertStringLiteralCompletions(
         return undefined;
     }
 
-    const optionalReplacementSpan = createTextSpanFromStringLiteralLikeContent(contextToken);
+    const optionalReplacementSpan = createTextSpanFromStringLiteralLikeContent(contextToken, position);
     switch (completion.kind) {
         case StringLiteralCompletionKind.Paths:
             return convertPathCompletions(completion.paths);
@@ -270,7 +270,7 @@ function convertStringLiteralCompletions(
                 kindModifiers: ScriptElementKindModifier.none,
                 kind: ScriptElementKind.string,
                 sortText: SortText.LocationPriority,
-                replacementSpan: getReplacementSpanForContextToken(contextToken),
+                replacementSpan: getReplacementSpanForContextToken(contextToken, position),
             }));
             return { isGlobalCompletion: false, isMemberCompletion: false, isNewIdentifierLocation: completion.isNewIdentifier, optionalReplacementSpan, entries };
         }

src/services/utilities.ts

@@ -2317,13 +2317,13 @@ function isInReferenceCommentWorker(sourceFile: SourceFile, position: number, sh
 }
 
 /** @internal */
-export function getReplacementSpanForContextToken(contextToken: Node | undefined) {
+export function getReplacementSpanForContextToken(contextToken: Node | undefined, position: number) {
     if (!contextToken) return undefined;
 
     switch (contextToken.kind) {
         case SyntaxKind.StringLiteral:
         case SyntaxKind.NoSubstitutionTemplateLiteral:
-            return createTextSpanFromStringLiteralLikeContent(contextToken as StringLiteralLike);
+            return createTextSpanFromStringLiteralLikeContent(contextToken as StringLiteralLike, position);
         default:
             return createTextSpanFromNode(contextToken);
     }
@@ -2335,12 +2335,12 @@ export function createTextSpanFromNode(node: Node, sourceFile?: SourceFile, endN
 }
 
 /** @internal */
-export function createTextSpanFromStringLiteralLikeContent(node: StringLiteralLike) {
+export function createTextSpanFromStringLiteralLikeContent(node: StringLiteralLike, position: number) {
     let replacementEnd = node.getEnd() - 1;
     if (node.isUnterminated) {
         // we return no replacement range only if unterminated string is empty
         if (node.getStart() === replacementEnd) return undefined;
-        replacementEnd = node.getEnd();
+        replacementEnd = Math.min(position, node.getEnd());
     }
     return createTextSpanFromBounds(node.getStart() + 1, replacementEnd);
 }

tests/cases/fourslash/stringCompletionsUnterminated.ts

@@ -18,15 +18,15 @@
 
 // @Filename: file4.ts
 //// const a = { "foo.bar": 1 }
-//// a["[|foo./*4*/b|]
+//// a["[|foo./*4*/|]b
 
 // @Filename: file5.ts
 //// const a = { "foo.bar": 1 }
-//// a['[|foo./*5*/b|]
+//// a['[|foo./*5*/|]b
 
 // @Filename: file6.ts
 //// const a = { "foo.bar": 1 }
-//// a[`[|foo./*6*/b|]
+//// a[`[|foo./*6*/|]b
 
 // @Filename: file7.ts
 //// const a = { "foo.bar": 1 }
@@ -44,19 +44,39 @@
 //// const a = { "foo.bar": 1 }
 //// a["[|foo/*10*/|]"
 
+// @Filename: file11.ts
+//// const a = { "foo.bar": 1 }
+//// a["[|f/*11*/|]oo.b
+
+// @Filename: file12.ts
+//// const a = { "foo.bar": 1 }
+//// a["[|f/*12*/oo.b|]"
+
+// @Filename: file13.ts
+//// const a = { "foo.bar": 1 }
+//// a["[|f/*13*/oo.b|]" // some comment!!
+
+// @Filename: file14.ts
+//// const a = { "foo.bar": 1 }
+//// a["[|f/*14*/|]oo.b // some comment!!
+
+// @Filename: file15.ts
+//// const a = { "foo.bar": 1 }
+//// a[`[|foo.b/*15*/|]
+
 // @Filename: empty1.ts
 //// const a = { "foo.bar": 1 }
-//// a[`/*11*/
+//// a[`/*a*/
 
 // @Filename: empty2.ts
 //// const a = { "foo.bar": 1 }
-//// a["/*12*/
+//// a["/*b*/
 
 // @Filename: empty3.ts
 //// const a = { "foo.bar": 1 }
-//// a['/*13*/
+//// a['/*c*/
 
-// tests 11-13 should return no replacementSpan
+// tests a,b,c should return no replacementSpan
 const markers = test.markers();
 const ranges = test.ranges();
 

tests/cases/fourslash/stringCompletionsUnterminated2.ts

@@ -0,0 +1,52 @@
+///<reference path="fourslash.ts" />
+
+// @Filename: test0.ts
+//// type Test = 'test';
+//// const test0: Test = `[|t/*0*/|]; // this comment should not be deleted
+
+// @Filename: test1.ts
+//// type Test = 'test';
+//// const test1: Test = '[|t/*1*/|]; // this comment should not be deleted
+
+// @Filename: test2.ts
+//// type Test = 'test';
+//// const test2: Test = "[|t/*2*/|] other stuff; // this comment should not be deleted
+
+// @Filename: test3.ts
+//// type Test = 'test';
+//// const test3: Test = "[|t/*3*/|]es // this comment should not be deleted
+
+// @Filename: test4.ts
+//// type Test = 'test';
+//// const test4: Test = "[|tes/*4*/|] // this comment should not be deleted
+
+// @Filename: file5.ts
+//// type Test = 'test';
+//// const test5: {prop0: Test, prop1: number, prop2: number,  } = { prop0: '[|t/*5*/|] ,prop1: 5, prop2: 2 };
+
+// @Filename: file6.ts
+//// type Test = 'test';
+//// const test6: {prop0: Test, prop1: number, prop2: number,  } = { prop0: '[|t/*6*/|]es ,prop1: 5, prop2: 2 };
+
+// @Filename: test7.ts
+//// type Test = 'test asdf';
+//// const test7: Test = `[|test as/*7*/|]; // this comment should not be deleted
+
+// @Filename: test8.ts
+//// type Test = 'test asdf';
+//// const test8: Test = `[|test/*8*/|] as; // this comment should not be deleted
+
+const markers = test.markers();
+const ranges = test.ranges();
+
+for (let i = 0; i < markers.length; i++) {
+    verify.completions({
+        marker: markers[i],
+        includes: [{
+            "name": "test",
+            "kind": "string",
+            "kindModifiers": "",
+            "replacementSpan": ranges[i],
+        }],
+    });    
+}