Handles time on vfs and write non empty shadowed files in baseline even if they were not read (#48703)

* Use fixed time for vfs so baselining is consistent

* Baseline buildinfos

* Write new file text in baseline even if the file wasnt read on the shadow

* Remove unnecessary debugger statement

Author: sheetalkamat

src/harness/vfsUtil.ts

@@ -55,12 +55,12 @@ namespace vfs {
         } = {};
 
         private _cwd: string; // current working directory
-        private _time: number | Date | (() => number | Date);
+        private _time: number;
         private _shadowRoot: FileSystem | undefined;
         private _dirStack: string[] | undefined;
 
         constructor(ignoreCase: boolean, options: FileSystemOptions = {}) {
-            const { time = -1, files, meta } = options;
+            const { time = ts.TestFSWithWatch.timeIncrements, files, meta } = options;
             this.ignoreCase = ignoreCase;
             this.stringComparer = this.ignoreCase ? vpath.compareCaseInsensitive : vpath.compareCaseSensitive;
             this._time = time;
@@ -167,16 +167,15 @@ namespace vfs {
          *
          * @link http://pubs.opengroup.org/onlinepubs/9699919799/functions/time.html
          */
-        public time(value?: number | Date | (() => number | Date)): number {
-            if (value !== undefined && this.isReadonly) throw createIOError("EPERM");
-            let result = this._time;
-            if (typeof result === "function") result = result();
-            if (typeof result === "object") result = result.getTime();
-            if (result === -1) result = Date.now();
+        public time(value?: number): number {
             if (value !== undefined) {
+                if (this.isReadonly) throw createIOError("EPERM");
                 this._time = value;
             }
-            return result;
+            else if (!this.isReadonly) {
+                this._time += ts.TestFSWithWatch.timeIncrements;
+            }
+            return this._time;
         }
 
         /**
@@ -843,7 +842,7 @@ namespace vfs {
                 container[basename] = new Symlink(node.symlink);
             }
             else {
-                container[basename] = new File(node.buffer || "");
+                container[basename] = new File(changed._getBuffer(node));
             }
             return true;
         }
@@ -1172,9 +1171,8 @@ namespace vfs {
     }
 
     export interface FileSystemOptions {
-        // Sets the initial timestamp for new files and directories, or the function used
-        // to calculate timestamps.
-        time?: number | Date | (() => number | Date);
+        // Sets the initial timestamp for new files and directories
+        time?: number;
 
         // A set of file system entries to initially add to the file system.
         files?: FileSet;

src/harness/virtualFileSystemWithWatch.ts

@@ -360,7 +360,7 @@ interface Array<T> { length: number; [n: number]: T; }`
         DynamicPolling = "RecursiveDirectoryUsingDynamicPriorityPolling"
     }
 
-    const timeIncrements = 1000;
+    export const timeIncrements = 1000;
     export interface TestServerHostOptions {
         useCaseSensitiveFileNames: boolean;
         executingFilePath: string;

src/testRunner/unittests/tsbuild/helpers.ts

@@ -78,26 +78,6 @@ namespace ts {
         };
     }
 
-    export function getTime() {
-        let currentTime = 100;
-        return { tick, time, touch };
-
-        function tick() {
-            currentTime += 60_000;
-        }
-
-        function time() {
-            return currentTime;
-        }
-
-        function touch(fs: vfs.FileSystem, path: string) {
-            if (!fs.statSync(path).isFile()) {
-                throw new Error(`File ${path} does not exist`);
-            }
-            fs.utimesSync(path, new Date(time()), new Date(time()));
-        }
-    }
-
     export const libContent = `${TestFSWithWatch.libFile.content}
 interface ReadonlyArray<T> {}
 declare const console: { log(msg: any): void; };`;
@@ -154,26 +134,6 @@ interface Symbol {
         fs.makeReadonly();
     }
 
-    /**
-     * Gets the FS mountuing existing fs's /src and /lib folder
-     */
-    export function getFsWithTime(baseFs: vfs.FileSystem) {
-        const { time, tick } = getTime();
-        const host = new fakes.System(baseFs) as any as vfs.FileSystemResolverHost;
-        host.getWorkspaceRoot = notImplemented;
-        const resolver = vfs.createResolver(host);
-        const fs = new vfs.FileSystem(/*ignoreCase*/ true, {
-            files: {
-                ["/src"]: new vfs.Mount("/src", resolver),
-                ["/lib"]: new vfs.Mount("/lib", resolver)
-            },
-            cwd: "/",
-            meta: { defaultLibLocation: "/lib" },
-            time
-        });
-        return { fs, time, tick };
-    }
-
     export function verifyOutputsPresent(fs: vfs.FileSystem, outputs: readonly string[]) {
         for (const output of outputs) {
             assert(fs.existsSync(output), `Expect file ${output} to exist`);
@@ -336,7 +296,6 @@ interface Symbol {
         commandLineArgs: TestTscCompile["commandLineArgs"];
         modifyFs: TestTscCompile["modifyFs"];
         editFs: TestTscEdit["modifyFs"];
-        tick: () => void;
         baseFs: vfs.FileSystem;
         newSys: TscCompileSystem;
         cleanBuildDiscrepancies: TestTscEdit["cleanBuildDiscrepancies"];
@@ -347,15 +306,14 @@ interface Symbol {
             const {
                 scenario, commandLineArgs, cleanBuildDiscrepancies,
                 modifyFs, editFs,
-                tick, baseFs, newSys
+                baseFs, newSys
             } = input();
             const sys = testTscCompile({
                 scenario,
                 subScenario,
                 fs: () => baseFs.makeReadonly(),
                 commandLineArgs,
                 modifyFs: fs => {
-                    tick();
                     if (modifyFs) modifyFs(fs);
                     editFs(fs);
                 },
@@ -532,22 +490,18 @@ interface Symbol {
         edits
     }: VerifyTscWithEditsWorkerInput) {
         describe(`tsc ${commandLineArgs.join(" ")} ${scenario}:: ${subScenario} serializedEdits`, () => {
-            let tick: () => void;
             let sys: TscCompileSystem;
             let baseFs: vfs.FileSystem;
             let editsSys: TscCompileSystem[];
             before(() => {
                 Debug.assert(!!edits.length, `${scenario}/${subScenario}:: No incremental scenarios, you probably want to use verifyTsc instead.`);
-                ({ fs: baseFs, tick } = getFsWithTime(fs()));
+                baseFs = fs().makeReadonly();
                 sys = testTscCompile({
                     scenario,
                     subScenario,
-                    fs: () => baseFs.makeReadonly(),
+                    fs: () => baseFs,
                     commandLineArgs,
-                    modifyFs: fs => {
-                        if (modifyFs) modifyFs(fs);
-                        tick();
-                    },
+                    modifyFs,
                     baselineSourceMap,
                     baselineReadFileCalls,
                     baselinePrograms
@@ -556,18 +510,13 @@ interface Symbol {
                     { modifyFs, subScenario: editScenario, commandLineArgs: editCommandLineArgs },
                     index
                 ) => {
-                    tick();
                     (editsSys || (editsSys = [])).push(testTscCompile({
                         scenario,
                         subScenario: editScenario || subScenario,
                         diffWithInitial: true,
                         fs: () => index === 0 ? sys.vfs : editsSys[index - 1].vfs,
                         commandLineArgs: editCommandLineArgs || commandLineArgs,
-                        modifyFs: fs => {
-                            tick();
-                            modifyFs(fs);
-                            tick();
-                        },
+                        modifyFs,
                         baselineSourceMap,
                         baselineReadFileCalls,
                         baselinePrograms
@@ -577,7 +526,6 @@ interface Symbol {
             after(() => {
                 baseFs = undefined!;
                 sys = undefined!;
-                tick = undefined!;
                 editsSys = undefined!;
             });
             describe("tsc invocation after edit", () => {
@@ -608,7 +556,6 @@ interface Symbol {
                         }
                     },
                     modifyFs,
-                    tick
                 }), index, subScenario));
             });
         });

src/testRunner/unittests/tsbuild/outFile.ts

@@ -10,10 +10,6 @@ namespace ts {
             outFileWithBuildFs = undefined!;
         });
 
-        function createSolutionBuilder(host: fakes.SolutionBuilderHost, baseOptions?: BuildOptions) {
-            return ts.createSolutionBuilder(host, ["/src/third"], { dry: false, force: false, verbose: true, ...(baseOptions || {}) });
-        }
-
         interface VerifyOutFileScenarioInput {
             subScenario: string;
             modifyFs?: (fs: vfs.FileSystem) => void;
@@ -108,8 +104,9 @@ namespace ts {
         function getOutFileFsAfterBuild() {
             if (outFileWithBuildFs) return outFileWithBuildFs;
             const fs = outFileFs.shadow();
-            const host = fakes.SolutionBuilderHost.create(fs);
-            const builder = createSolutionBuilder(host);
+            const sys = new fakes.System(fs, { executingFilePath: "/lib/tsc" });
+            const host = createSolutionBuilderHostForBaseline(sys as TscCompileSystem);
+            const builder = createSolutionBuilder(host, ["/src/third"], { dry: false, force: false, verbose: true });
             builder.build();
             fs.makeReadonly();
             return outFileWithBuildFs = fs;
@@ -147,7 +144,7 @@ namespace ts {
             compile: sys => {
                 // Buildinfo will have version which does not match with current ts version
                 const buildHost = createSolutionBuilderHostForBaseline(sys, "FakeTSCurrentVersion");
-                const builder = ts.createSolutionBuilder(buildHost, ["/src/third"], { verbose: true });
+                const builder = createSolutionBuilder(buildHost, ["/src/third"], { verbose: true });
                 sys.exit(builder.build());
             }
         });
@@ -181,7 +178,7 @@ namespace ts {
             commandLineArgs: ["--build", "/src/second/tsconfig.json"],
             compile: sys => {
                 const buildHost = createSolutionBuilderHostForBaseline(sys);
-                const builder = ts.createSolutionBuilder(buildHost, ["/src/third/tsconfig.json"], {});
+                const builder = createSolutionBuilder(buildHost, ["/src/third/tsconfig.json"], {});
                 sys.exit(builder.build("/src/second/tsconfig.json"));
             }
         });
@@ -193,7 +190,7 @@ namespace ts {
             commandLineArgs: ["--build", "--clean", "/src/second/tsconfig.json"],
             compile: sys => {
                 const buildHost = createSolutionBuilderHostForBaseline(sys);
-                const builder = ts.createSolutionBuilder(buildHost, ["/src/third/tsconfig.json"], { verbose: true });
+                const builder = createSolutionBuilder(buildHost, ["/src/third/tsconfig.json"], { verbose: true });
                 sys.exit(builder.clean("/src/second/tsconfig.json"));
             }
         });

src/testRunner/unittests/tsbuild/publicApi.ts

@@ -2,7 +2,7 @@ namespace ts {
     describe("unittests:: tsbuild:: Public API with custom transformers when passed to build", () => {
         let sys: TscCompileSystem;
         before(() => {
-            const initialFs = getFsWithTime(loadProjectFromFiles({
+            const inputFs = loadProjectFromFiles({
                 "/src/tsconfig.json": JSON.stringify({
                     references: [
                         { path: "./shared/tsconfig.json" },
@@ -29,9 +29,7 @@ export class c2 { }
 export enum e2 { }
 // leading
 export function f22() { } // trailing`,
-            })).fs.makeReadonly();
-            const inputFs = initialFs.shadow();
-            inputFs.makeReadonly();
+            }).makeReadonly();
             const fs = inputFs.shadow();
 
             // Create system

src/testRunner/unittests/tsbuild/sample.ts

@@ -21,7 +21,8 @@ namespace ts {
         function getSampleFsAfterBuild() {
             if (projFsWithBuild) return projFsWithBuild;
             const fs = projFs.shadow();
-            const host = fakes.SolutionBuilderHost.create(fs);
+            const sys = new fakes.System(fs, { executingFilePath: "/lib/tsc" });
+            const host = createSolutionBuilderHostForBaseline(sys as TscCompileSystem);
             const builder = createSolutionBuilder(host, ["/src/tests"], {});
             builder.build();
             fs.makeReadonly();

src/testRunner/unittests/tsc/helpers.ts

@@ -214,7 +214,7 @@ ${patch ? vfs.formatPatch(patch) : ""}`
                 describe(input.subScenario, () => {
                     verifyTscBaseline(() => verifier({
                         ...input,
-                        fs: () => getFsWithTime(input.fs()).fs.makeReadonly()
+                        fs: () => input.fs().makeReadonly()
                     }));
                 });
             });

tests/baselines/reference/tsbuild/amdModulesWithOut/modules-and-globals-mixed-in-amd.js

@@ -69,17 +69,17 @@ const globalConst = 10;
 
 Output::
 /lib/tsc --b /src/app --verbose
-[[90m12:01:00 AM[0m] Projects in this build: 
+[[90m12:00:06 AM[0m] Projects in this build: 
     * src/lib/tsconfig.json
     * src/app/tsconfig.json
 
-[[90m12:01:00 AM[0m] Project 'src/lib/tsconfig.json' is out of date because output file 'src/lib/module.js' does not exist
+[[90m12:00:07 AM[0m] Project 'src/lib/tsconfig.json' is out of date because output file 'src/lib/module.js' does not exist
 
-[[90m12:01:00 AM[0m] Building project '/src/lib/tsconfig.json'...
+[[90m12:00:08 AM[0m] Building project '/src/lib/tsconfig.json'...
 
-[[90m12:01:00 AM[0m] Project 'src/app/tsconfig.json' is out of date because output file 'src/app/module.js' does not exist
+[[90m12:00:16 AM[0m] Project 'src/app/tsconfig.json' is out of date because output file 'src/app/module.js' does not exist
 
-[[90m12:01:00 AM[0m] Building project '/src/app/tsconfig.json'...
+[[90m12:00:17 AM[0m] Building project '/src/app/tsconfig.json'...
 
 exitCode:: ExitStatus.Success
 
@@ -936,19 +936,19 @@ export const x = 10;console.log(x);
 
 Output::
 /lib/tsc --b /src/app --verbose
-[[90m12:04:00 AM[0m] Projects in this build: 
+[[90m12:00:30 AM[0m] Projects in this build: 
     * src/lib/tsconfig.json
     * src/app/tsconfig.json
 
-[[90m12:04:00 AM[0m] Project 'src/lib/tsconfig.json' is out of date because oldest output 'src/lib/module.js' is older than newest input 'src/lib/file1.ts'
+[[90m12:00:31 AM[0m] Project 'src/lib/tsconfig.json' is out of date because oldest output 'src/lib/module.js' is older than newest input 'src/lib/file1.ts'
 
-[[90m12:04:00 AM[0m] Building project '/src/lib/tsconfig.json'...
+[[90m12:00:32 AM[0m] Building project '/src/lib/tsconfig.json'...
 
-[[90m12:04:00 AM[0m] Project 'src/app/tsconfig.json' is out of date because output of its dependency 'src/lib' has changed
+[[90m12:00:40 AM[0m] Project 'src/app/tsconfig.json' is out of date because output of its dependency 'src/lib' has changed
 
-[[90m12:04:00 AM[0m] Updating output of project '/src/app/tsconfig.json'...
+[[90m12:00:41 AM[0m] Updating output of project '/src/app/tsconfig.json'...
 
-[[90m12:04:00 AM[0m] Updating unchanged output timestamps of project '/src/app/tsconfig.json'...
+[[90m12:00:46 AM[0m] Updating unchanged output timestamps of project '/src/app/tsconfig.json'...
 
 exitCode:: ExitStatus.Success