Do not lowercase typeReference directive name (#58525)

src/testRunner/unittests/tsc/forceConsistentCasingInFileNames.ts

@@ -26,4 +26,19 @@ describe("unittests:: tsc:: forceConsistentCasingInFileNames::", () => {
         commandLineArgs: ["-p", "/home/src/projects/project/tsconfig.json", "--explainFiles"],
         fs: () => loadProjectFromFiles(getFsContentsForMultipleErrorsForceConsistentCasingInFileNames()),
     });
+
+    verifyTsc({
+        scenario: "forceConsistentCasingInFileNames",
+        subScenario: "with type ref from file",
+        commandLineArgs: ["-p", "/src/project/src", "--explainFiles", "--traceResolution"],
+        fs: () =>
+            loadProjectFromFiles({
+                "/src/project/src/fileOne.d.ts": `declare class c { }`,
+                "/src/project/src/file2.d.ts": dedent`
+                    /// <reference types="./fileOne.d.ts"/>
+                    declare const y: c;
+                `,
+                "/src/project/src/tsconfig.json": "{ }",
+            }),
+    });
 });

src/testRunner/unittests/tsserver/typeReferenceDirectives.ts

@@ -10,7 +10,7 @@ import {
     libFile,
 } from "../helpers/virtualFileSystemWithWatch.js";
 
-describe("unittests:: tsserver:: typeReferenceDirectives", () => {
+describe("unittests:: tsserver:: typeReferenceDirectives::", () => {
     it("when typeReferenceDirective contains UpperCasePackage", () => {
         const libProjectLocation = `/user/username/projects/myproject/lib`;
         const typeLib: File = {
@@ -52,6 +52,7 @@ declare class TestLib {
                 compilerOptions: {
                     module: "amd",
                     typeRoots: ["../lib/@types", "../lib/@app"],
+                    traceResolution: true,
                 },
             }),
         };