From ecc5cf850cddc2c2a89b796090e577ea7acb4f98 Mon Sep 17 00:00:00 2001
From: Matthieu Riegler <kyro38@gmail.com>
Date: Mon, 20 May 2024 16:02:22 +0200
Subject: [PATCH] fix(58584): formatJSDocLink shouldn't introduce a trailing
 space when non link text.

fixes #58584
---
 src/compiler/utilitiesPublic.ts           |   2 +-
 src/testRunner/unittests/jsDocParsing.ts  |  18 ++++
 tests/baselines/reference/linkTagEmit1.js | 112 +++++++++++-----------
 3 files changed, 75 insertions(+), 57 deletions(-)

diff --git a/src/compiler/utilitiesPublic.ts b/src/compiler/utilitiesPublic.ts
index 45ec4057f6b79..2ff6e7adaa867 100644
--- a/src/compiler/utilitiesPublic.ts
+++ b/src/compiler/utilitiesPublic.ts
@@ -1253,7 +1253,7 @@ function formatJSDocLink(link: JSDocLink | JSDocLinkCode | JSDocLinkPlain) {
         : link.kind === SyntaxKind.JSDocLinkCode ? "linkcode"
         : "linkplain";
     const name = link.name ? entityNameToString(link.name) : "";
-    const space = link.name && link.text.startsWith("://") ? "" : " ";
+    const space = link.name && (link.text === "" || link.text.startsWith("://")) ? "" : " ";
     return `{@${kind} ${name}${space}${link.text}}`;
 }
 
diff --git a/src/testRunner/unittests/jsDocParsing.ts b/src/testRunner/unittests/jsDocParsing.ts
index bc0781229783e..546bffaa777e1 100644
--- a/src/testRunner/unittests/jsDocParsing.ts
+++ b/src/testRunner/unittests/jsDocParsing.ts
@@ -560,4 +560,22 @@ class Foo  {};
             assert.equal(ts.getTextOfJSDocComment(seeTag.comment), "{@link foo#bar label}");
         });
     });
+
+    describe("getTextOfJSDocComment", () => {
+        it("should preserve link without introducing space", () => {
+            const sourceText = `
+/**
+ *
+ * @see {@link foo}
+ */
+class Foo  {};
+`;
+
+            const root = ts.createSourceFile("foo.ts", sourceText, ts.ScriptTarget.ES5, /*setParentNodes*/ true);
+            const [classDecl] = root.statements;
+            const [seeTag] = ts.getJSDocTags(classDecl);
+
+            assert.equal(ts.getTextOfJSDocComment(seeTag.comment), "{@link foo}");
+        });
+    });
 });
diff --git a/tests/baselines/reference/linkTagEmit1.js b/tests/baselines/reference/linkTagEmit1.js
index 0fe024f665afa..6bbee1d6b0b22 100644
--- a/tests/baselines/reference/linkTagEmit1.js
+++ b/tests/baselines/reference/linkTagEmit1.js
@@ -1,10 +1,10 @@
-//// [tests/cases/conformance/jsdoc/linkTagEmit1.ts] ////
-
-//// [declarations.d.ts]
+//// [tests/cases/conformance/jsdoc/linkTagEmit1.ts] ////
+
+//// [declarations.d.ts]
 declare namespace NS {
     type R = number
-}
-//// [linkTagEmit1.js]
+}
+//// [linkTagEmit1.js]
 /** @typedef {number} N */
 /**
  * @typedef {Object} D1
@@ -25,54 +25,54 @@ function computeCommonSourceDirectoryOfFilenames(integer) {
 var see3 = true
 
 /** @typedef {number} Attempt {@link https://wat} {@linkcode I think lingcod is better} {@linkplain or lutefisk}*/
-
-
-//// [linkTagEmit1.js]
-/** @typedef {number} N */
-/**
- * @typedef {Object} D1
- * @property {1} e Just link to {@link NS.R} this time
- * @property {1} m Wyatt Earp loved {@link N integers} I bet.
- */
-/** @typedef {number} Z @see N {@link N} */
-/**
- * @param {number} integer {@link Z}
- */
-function computeCommonSourceDirectoryOfFilenames(integer) {
-    return integer + 1; // pls pls pls
-}
-/** {@link https://hvad} */
-var see3 = true;
-/** @typedef {number} Attempt {@link https://wat} {@linkcode I think lingcod is better} {@linkplain or lutefisk}*/
-
-
-//// [linkTagEmit1.d.ts]
-/** @typedef {number} N */
-/**
- * @typedef {Object} D1
- * @property {1} e Just link to {@link NS.R} this time
- * @property {1} m Wyatt Earp loved {@link N integers} I bet.
- */
-/** @typedef {number} Z @see N {@link N} */
-/**
- * @param {number} integer {@link Z}
- */
-declare function computeCommonSourceDirectoryOfFilenames(integer: number): number;
-/** {@link https://hvad} */
-declare var see3: boolean;
-type N = number;
-type D1 = {
-    /**
-     * Just link to {@link NS.R } this time
-     */
-    e: 1;
-    /**
-     * Wyatt Earp loved {@link N integers} I bet.
-     */
-    m: 1;
-};
-type Z = number;
-/**
- * {@link https://wat} {@linkcode I think lingcod is better} {@linkplain or lutefisk}
- */
-type Attempt = number;
+
+
+//// [linkTagEmit1.js]
+/** @typedef {number} N */
+/**
+ * @typedef {Object} D1
+ * @property {1} e Just link to {@link NS.R} this time
+ * @property {1} m Wyatt Earp loved {@link N integers} I bet.
+ */
+/** @typedef {number} Z @see N {@link N} */
+/**
+ * @param {number} integer {@link Z}
+ */
+function computeCommonSourceDirectoryOfFilenames(integer) {
+    return integer + 1; // pls pls pls
+}
+/** {@link https://hvad} */
+var see3 = true;
+/** @typedef {number} Attempt {@link https://wat} {@linkcode I think lingcod is better} {@linkplain or lutefisk}*/
+
+
+//// [linkTagEmit1.d.ts]
+/** @typedef {number} N */
+/**
+ * @typedef {Object} D1
+ * @property {1} e Just link to {@link NS.R} this time
+ * @property {1} m Wyatt Earp loved {@link N integers} I bet.
+ */
+/** @typedef {number} Z @see N {@link N} */
+/**
+ * @param {number} integer {@link Z}
+ */
+declare function computeCommonSourceDirectoryOfFilenames(integer: number): number;
+/** {@link https://hvad} */
+declare var see3: boolean;
+type N = number;
+type D1 = {
+    /**
+     * Just link to {@link NS.R} this time
+     */
+    e: 1;
+    /**
+     * Wyatt Earp loved {@link N integers} I bet.
+     */
+    m: 1;
+};
+type Z = number;
+/**
+ * {@link https://wat} {@linkcode I think lingcod is better} {@linkplain or lutefisk}
+ */
+type Attempt = number;