Backend half

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/config-loader.test.ts

@@ -0,0 +1,101 @@
+import {
+  configLoader,
+  loadConfig,
+  ConfigLoaderFailResult,
+  ConfigLoaderSuccessResult,
+} from "../config-loader";
+import { join } from "path";
+
+describe("config-loader", (): void => {
+  it("should use explicitParams when set", () => {
+    const result = configLoader({
+      explicitParams: {
+        baseUrl: "/foo/bar",
+        paths: {
+          asd: ["asd"],
+        },
+      },
+      cwd: "/baz",
+    });
+
+    const successResult = result as ConfigLoaderSuccessResult;
+    expect(successResult.resultType).toBe("success");
+    expect(successResult.absoluteBaseUrl).toBe("/foo/bar");
+    expect(successResult.paths["asd"][0]).toBe("asd");
+  });
+
+  it("should use explicitParams when set and add cwd when path is relative", () => {
+    const result = configLoader({
+      explicitParams: {
+        baseUrl: "bar/",
+        paths: {
+          asd: ["asd"],
+        },
+      },
+      cwd: "/baz",
+    });
+
+    const successResult = result as ConfigLoaderSuccessResult;
+    expect(successResult.resultType).toBe("success");
+    expect(successResult.absoluteBaseUrl).toBe(join("/baz", "bar/"));
+  });
+
+  it("should fallback to tsConfigLoader when explicitParams is not set", () => {
+    const result = configLoader({
+      explicitParams: undefined,
+      cwd: "/baz",
+      tsConfigLoader: () => ({
+        tsConfigPath: "/baz/tsconfig.json",
+        baseUrl: "./src",
+        paths: {},
+      }),
+    });
+
+    const successResult = result as ConfigLoaderSuccessResult;
+    expect(successResult.resultType).toBe("success");
+    expect(successResult.absoluteBaseUrl).toBe(join("/baz", "src"));
+  });
+
+  it("should tolerate a missing baseUrl", () => {
+    const result = configLoader({
+      explicitParams: undefined,
+      cwd: "/baz",
+      tsConfigLoader: () => ({
+        tsConfigPath: "/baz/tsconfig.json",
+        baseUrl: undefined,
+        paths: {},
+      }),
+    });
+
+    const failResult = result as ConfigLoaderFailResult;
+    expect(failResult.resultType).toBe("success");
+  });
+
+  it("should presume cwd to be a tsconfig file when loadConfig is called with absolute path to tsconfig.json", () => {
+    // using tsconfig-named.json to ensure that future changes to fix
+    // https://github.com/dividab/tsconfig-paths/issues/31
+    // do not pass this test case just because of a directory walk looking
+    // for tsconfig.json
+    const configFile = join(__dirname, "tsconfig-named.json");
+    const result = loadConfig(configFile);
+
+    const successResult = result as ConfigLoaderSuccessResult;
+    expect(successResult.resultType).toBe("success");
+    expect(successResult.configFileAbsolutePath).toBe(configFile);
+  });
+
+  it("should allow an absolute baseUrl in tsconfig.json", () => {
+    const result = configLoader({
+      explicitParams: undefined,
+      cwd: "/baz",
+      tsConfigLoader: () => ({
+        tsConfigPath: "/baz/tsconfig.json",
+        baseUrl: "/baz",
+        paths: {},
+      }),
+    });
+
+    const successResult = result as ConfigLoaderSuccessResult;
+    expect(successResult.absoluteBaseUrl).toEqual("/baz");
+  });
+});

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/data/match-path-data.ts

@@ -0,0 +1,230 @@
+import { join, dirname } from "path";
+import { removeExtension } from "../../filesystem";
+
+export interface OneTest {
+  readonly name: string;
+  readonly only?: boolean;
+  readonly skip?: boolean;
+  readonly absoluteBaseUrl: string;
+  readonly paths: { [key: string]: Array<string> };
+  readonly mainFields?: (string | string[])[];
+  readonly addMatchAll?: boolean;
+  readonly existingFiles: ReadonlyArray<string>;
+  readonly requestedModule: string;
+  readonly extensions: ReadonlyArray<string>;
+  readonly packageJson?: {};
+  readonly expectedPath: string | undefined;
+}
+
+const defaultExtensionsWhenRunningInTsNode = [
+  ".js",
+  ".json",
+  ".node",
+  ".ts",
+  ".tsx",
+];
+
+export const tests: ReadonlyArray<OneTest> = [
+  {
+    name: "should locate path that matches with star and exists",
+    absoluteBaseUrl: "/root/",
+    paths: {
+      "lib/*": ["location/*"],
+    },
+    existingFiles: [join("/root", "location", "mylib", "index.ts")],
+    requestedModule: "lib/mylib",
+    expectedPath: dirname(join("/root", "location", "mylib", "index.ts")),
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should resolve to correct path when many are specified",
+    absoluteBaseUrl: "/root/",
+    paths: {
+      "lib/*": ["foo1/*", "foo2/*", "location/*", "foo3/*"],
+    },
+    existingFiles: [join("/root", "location", "mylib", "index.ts")],
+    requestedModule: "lib/mylib",
+    extensions: [".ts"],
+    expectedPath: dirname(join("/root", "location", "mylib", "index.ts")),
+  },
+  {
+    name:
+      "should locate path that matches with star and prioritize pattern with longest prefix",
+    absoluteBaseUrl: "/root/",
+    paths: {
+      "*": ["location/*"],
+      "lib/*": ["location/*"],
+    },
+    existingFiles: [
+      join("/root", "location", "lib", "mylib", "index.ts"),
+      join("/root", "location", "mylib", "index.ts"),
+    ],
+    requestedModule: "lib/mylib",
+    expectedPath: dirname(join("/root", "location", "mylib", "index.ts")),
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should locate path that matches with star and exists with extension",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    existingFiles: [join("/root", "location", "mylib.myext")],
+    requestedModule: "lib/mylib",
+    extensions: [".js", ".myext"],
+    expectedPath: removeExtension(join("/root", "location", "mylib.myext")),
+  },
+  {
+    name: "should resolve request with extension specified",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    existingFiles: [join("/root", "location", "test.jpg")],
+    requestedModule: "lib/test.jpg",
+    expectedPath: join("/root", "location", "test.jpg"),
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should locate path that matches without star and exists",
+    absoluteBaseUrl: "/root/",
+    paths: {
+      "lib/foo": ["location/foo"],
+    },
+    existingFiles: [join("/root", "location", "foo.ts")],
+    requestedModule: "lib/foo",
+    expectedPath: removeExtension(join("/root", "location", "foo.ts")),
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should resolve to parent folder when filename is in subfolder",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    existingFiles: [join("/root", "location", "mylib", "index.ts")],
+    requestedModule: "lib/mylib",
+    expectedPath: dirname(join("/root", "location", "mylib", "index.ts")),
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should resolve from main field in package.json",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    existingFiles: [join("/root", "location", "mylib", "kalle.ts")],
+    packageJson: { main: "./kalle.ts" },
+    requestedModule: "lib/mylib",
+    expectedPath: join("/root", "location", "mylib", "kalle.ts"),
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should resolve from main field in package.json (js)",
+    absoluteBaseUrl: "/root",
+    paths: { "lib/*": ["location/*"] },
+    existingFiles: [join("/root", "location", "mylib.js", "kalle.js")],
+    packageJson: { main: "./kalle.js" },
+    requestedModule: "lib/mylib.js",
+    extensions: [".ts", ".js"],
+    expectedPath: join("/root", "location", "mylib.js", "kalle.js"),
+  },
+  {
+    name: "should resolve from list of fields by priority in package.json",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    mainFields: ["missing", "browser", "main"],
+    packageJson: { main: "./main.js", browser: "./browser.js" },
+    existingFiles: [
+      join("/root", "location", "mylibjs", "main.js"), // mainFilePath
+      join("/root", "location", "mylibjs", "browser.js"), // browserFilePath
+    ],
+    extensions: [".ts", ".js"],
+    requestedModule: "lib/mylibjs",
+    expectedPath: join("/root", "location", "mylibjs", "browser.js"),
+  },
+  {
+    name: "should ignore field mappings to missing files in package.json",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    mainFields: ["browser", "main"],
+    existingFiles: [join("/root", "location", "mylibjs", "kalle.js")],
+    requestedModule: "lib/mylibjs",
+    packageJson: {
+      main: "./kalle.js",
+      browser: "./nope.js",
+    },
+    extensions: [".ts", ".js"],
+    expectedPath: join("/root", "location", "mylibjs", "kalle.js"),
+  },
+  {
+    name: "should resolve nested main fields",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    mainFields: [["esnext", "main"]],
+    packageJson: { esnext: { main: "./main.js" } },
+    existingFiles: [join("/root", "location", "mylibjs", "main.js")],
+    extensions: [".ts", ".js"],
+    requestedModule: "lib/mylibjs",
+    expectedPath: join("/root", "location", "mylibjs", "main.js"),
+  },
+  {
+    name: "should ignore advanced field mappings in package.json",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    existingFiles: [
+      join("/root", "location", "mylibjs", "kalle.js"),
+      join("/root", "location", "mylibjs", "browser.js"),
+    ],
+    requestedModule: "lib/mylibjs",
+    packageJson: {
+      main: "./kalle.js",
+      browser: { mylibjs: "./browser.js", "./kalle.js": "./browser.js" },
+    },
+    extensions: [".ts", ".js"],
+    expectedPath: join("/root", "location", "mylibjs", "kalle.js"),
+  },
+  {
+    name: "should resolve to with the help of baseUrl when not explicitly set",
+    absoluteBaseUrl: "/root/",
+    paths: {},
+    existingFiles: [join("/root", "mylib", "index.ts")],
+    requestedModule: "mylib",
+    expectedPath: dirname(join("/root", "mylib", "index.ts")),
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should not resolve with the help of baseUrl when asked not to",
+    absoluteBaseUrl: "/root/",
+    paths: {},
+    addMatchAll: false,
+    existingFiles: [join("/root", "mylib", "index.ts")],
+    requestedModule: "mylib",
+    expectedPath: undefined,
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should not locate path that does not match",
+    absoluteBaseUrl: "/root/",
+    paths: { "lib/*": ["location/*"] },
+    existingFiles: [join("root", "location", "mylib")],
+    requestedModule: "mylib",
+    expectedPath: undefined,
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should not resolve typings file (index.d.ts)",
+    absoluteBaseUrl: "/root/",
+    paths: {
+      "lib/*": ["location/*"],
+    },
+    existingFiles: [join("/root", "location", "mylib", "index.d.ts")],
+    requestedModule: "lib/mylib",
+    expectedPath: undefined,
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+  {
+    name: "should resolve main file with cjs file extension",
+    absoluteBaseUrl: "/root/",
+    paths: {},
+    existingFiles: [join("/root", "mylib", "index.cjs")],
+    packageJson: {
+      main: "./index.cjs",
+    },
+    requestedModule: "mylib",
+    expectedPath: join("/root", "mylib", "index.cjs"),
+    extensions: defaultExtensionsWhenRunningInTsNode,
+  },
+];

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/filesystem.test.ts

@@ -0,0 +1,57 @@
+import * as Filesystem from "../filesystem";
+import * as path from "path";
+
+describe("filesystem", () => {
+  const fileThatExists = path.join(__dirname, "../../package.json");
+  const fileThatNotExists = path.join(__dirname, "../../package2.json");
+
+  it("should find file that exists, sync", () => {
+    const result = Filesystem.fileExistsSync(fileThatExists);
+    expect(result).toBe(true);
+  });
+
+  it("should not find file that not exists, sync", () => {
+    const result = Filesystem.fileExistsSync(fileThatNotExists);
+    expect(result).toBe(false);
+  });
+
+  it("should find file that exists, async", (done) => {
+    Filesystem.fileExistsAsync(fileThatExists, (_err, result) => {
+      try {
+        expect(result).toBe(true);
+        done();
+      } catch (error) {
+        done(error);
+      }
+    });
+  });
+
+  it("should not find file that not exists, async", (done) => {
+    Filesystem.fileExistsAsync(fileThatNotExists, (_err, result) => {
+      try {
+        expect(result).toBe(false);
+        done();
+      } catch (error) {
+        done(error);
+      }
+    });
+  });
+
+  it("should load json, sync", () => {
+    const result = Filesystem.readJsonFromDiskSync(fileThatExists);
+    expect(result);
+    expect(result.main).toBe("lib/index.js");
+  });
+
+  it("should load json, async", (done) => {
+    Filesystem.readJsonFromDiskAsync(fileThatExists, (_err, result) => {
+      try {
+        expect(result).toBeTruthy();
+        expect(result.main).toBe("lib/index.js");
+        done();
+      } catch (error) {
+        done(error);
+      }
+    });
+  });
+});

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/mapping-entry.test.ts

@@ -0,0 +1,43 @@
+import { getAbsoluteMappingEntries } from "../mapping-entry";
+import { join } from "path";
+
+describe("mapping-entry", () => {
+  it("should change to absolute paths and sort in longest prefix order", () => {
+    const result = getAbsoluteMappingEntries(
+      "/absolute/base/url",
+      {
+        "*": ["/foo1", "./foo2"],
+        "longest/pre/fix/*": ["./foo2/bar"],
+        "pre/fix/*": ["/foo3"],
+      },
+      true
+    );
+    expect(result).toEqual([
+      {
+        pattern: "longest/pre/fix/*",
+        paths: [join("/absolute", "base", "url", "foo2", "bar")],
+      },
+      {
+        pattern: "pre/fix/*",
+        paths: [join("/foo3")],
+      },
+      {
+        pattern: "*",
+        paths: [join("/foo1"), join("/absolute", "base", "url", "foo2")],
+      },
+    ]);
+  });
+
+  it("should should add a match-all pattern when requested", () => {
+    let result = getAbsoluteMappingEntries("/absolute/base/url", {}, true);
+    expect(result).toEqual([
+      {
+        pattern: "*",
+        paths: [join("/absolute", "base", "url", "*")],
+      },
+    ]);
+
+    result = getAbsoluteMappingEntries("/absolute/base/url", {}, false);
+    expect(result).toEqual([]);
+  });
+});

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/match-path-async.test.ts

@@ -0,0 +1,26 @@
+import { createMatchPathAsync } from "../match-path-async";
+import * as Tests from "./data/match-path-data";
+
+describe("match-path-async", () => {
+  Tests.tests.forEach((t) =>
+    it(t.name, (done) => {
+      const matchPath = createMatchPathAsync(
+        t.absoluteBaseUrl,
+        t.paths,
+        t.mainFields,
+        t.addMatchAll
+      );
+      matchPath(
+        t.requestedModule,
+        (_path, callback) => callback(undefined, t.packageJson),
+        (path, callback) =>
+          callback(undefined, t.existingFiles.indexOf(path) !== -1),
+        t.extensions,
+        (_err, result) => {
+          expect(result).toBe(t.expectedPath);
+          done();
+        }
+      );
+    })
+  );
+});

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/match-path-sync.test.ts

@@ -0,0 +1,22 @@
+import { createMatchPath } from "../match-path-sync";
+import * as Tests from "./data/match-path-data";
+
+describe("match-path-sync", () => {
+  Tests.tests.forEach((t) =>
+    it(t.name, () => {
+      const matchPath = createMatchPath(
+        t.absoluteBaseUrl,
+        t.paths,
+        t.mainFields,
+        t.addMatchAll
+      );
+      const result = matchPath(
+        t.requestedModule,
+        (_: string) => t.packageJson,
+        (name: string) => t.existingFiles.indexOf(name) !== -1,
+        t.extensions
+      );
+      expect(result).toBe(t.expectedPath);
+    })
+  );
+});

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/try-path.test.ts

@@ -0,0 +1,141 @@
+import { getPathsToTry } from "../try-path";
+import { join } from "path";
+
+describe("mapping-entry", () => {
+  const abosolutePathMappings = [
+    {
+      pattern: "longest/pre/fix/*",
+      paths: [join("/absolute", "base", "url", "foo2", "bar")],
+    },
+    { pattern: "pre/fix/*", paths: [join("/absolute", "base", "url", "foo3")] },
+    { pattern: "*", paths: [join("/absolute", "base", "url", "foo1")] },
+  ];
+  const abosolutePathMappingsStarstWithSlash = [
+    {
+      pattern: "/opt/*",
+      paths: [join("/absolute", "src", "aws-layer")],
+    },
+    {
+      pattern: "*",
+      paths: [join("/absolute", "src")],
+    },
+  ];
+  it("should return no paths for relative requested module", () => {
+    const result = getPathsToTry(
+      [".ts", "tsx"],
+      abosolutePathMappings,
+      "./requested-module"
+    );
+    expect(result).toBeUndefined();
+  });
+
+  it("should return no paths if no pattern match the requested module", () => {
+    const result = getPathsToTry(
+      [".ts", "tsx"],
+      [
+        {
+          pattern: "longest/pre/fix/*",
+          paths: [join("/absolute", "base", "url", "foo2", "bar")],
+        },
+        {
+          pattern: "pre/fix/*",
+          paths: [join("/absolute", "base", "url", "foo3")],
+        },
+      ],
+      "requested-module"
+    );
+    expect(result).toBeUndefined();
+  });
+
+  it("should get all paths that matches requested module", () => {
+    const result = getPathsToTry(
+      [".ts", ".tsx"],
+      abosolutePathMappings,
+      "longest/pre/fix/requested-module"
+    );
+    expect(result).toEqual([
+      // "longest/pre/fix/*"
+      { type: "file", path: join("/absolute", "base", "url", "foo2", "bar") },
+      {
+        type: "extension",
+        path: join("/absolute", "base", "url", "foo2", "bar.ts"),
+      },
+      {
+        type: "extension",
+        path: join("/absolute", "base", "url", "foo2", "bar.tsx"),
+      },
+      {
+        type: "package",
+        path: join("/absolute", "base", "url", "foo2", "bar", "package.json"),
+      },
+      {
+        type: "index",
+        path: join("/absolute", "base", "url", "foo2", "bar", "index.ts"),
+      },
+      {
+        type: "index",
+        path: join("/absolute", "base", "url", "foo2", "bar", "index.tsx"),
+      },
+      // "*"
+      { type: "file", path: join("/absolute", "base", "url", "foo1") },
+      { type: "extension", path: join("/absolute", "base", "url", "foo1.ts") },
+      { type: "extension", path: join("/absolute", "base", "url", "foo1.tsx") },
+      {
+        type: "package",
+        path: join("/absolute", "base", "url", "foo1", "package.json"),
+      },
+      {
+        type: "index",
+        path: join("/absolute", "base", "url", "foo1", "index.ts"),
+      },
+      {
+        type: "index",
+        path: join("/absolute", "base", "url", "foo1", "index.tsx"),
+      },
+    ]);
+  });
+
+  it("should resolve paths starting with a slash", () => {
+    const result = getPathsToTry(
+      [".ts"],
+      abosolutePathMappingsStarstWithSlash,
+      "/opt/utils"
+    );
+    expect(result).toEqual([
+      // "opt/*"
+      {
+        path: join("/absolute", "src", "aws-layer"),
+        type: "file",
+      },
+      {
+        path: join("/absolute", "src", "aws-layer.ts"),
+        type: "extension",
+      },
+      {
+        path: join("/absolute", "src", "aws-layer", "package.json"),
+        type: "package",
+      },
+      {
+        path: join("/absolute", "src", "aws-layer", "index.ts"),
+        type: "index",
+      },
+      // "*"
+      {
+        path: join("/absolute", "src"),
+        type: "file",
+      },
+      {
+        path: join("/absolute", "src.ts"),
+        type: "extension",
+      },
+      {
+        path: join("/absolute", "src", "package.json"),
+        type: "package",
+      },
+      {
+        path: join("/absolute", "src", "index.ts"),
+        type: "index",
+      },
+    ]);
+  });
+});

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/tsconfig-loader.test.ts

@@ -0,0 +1,428 @@
+import {
+  loadTsconfig,
+  tsConfigLoader,
+  walkForTsConfig,
+} from "../tsconfig-loader";
+import { join } from "path";
+
+describe("tsconfig-loader", () => {
+  it("should find tsconfig in cwd", () => {
+    const result = tsConfigLoader({
+      cwd: "/foo/bar",
+      getEnv: (_: string) => undefined,
+      loadSync: (cwd: string) => {
+        return {
+          tsConfigPath: `${cwd}/tsconfig.json`,
+          baseUrl: "./",
+          paths: {},
+        };
+      },
+    });
+
+    expect(result.tsConfigPath).toBe("/foo/bar/tsconfig.json");
+  });
+
+  it("should return loaderResult.tsConfigPath as undefined when not found", () => {
+    const result = tsConfigLoader({
+      cwd: "/foo/bar",
+      getEnv: (_: string) => undefined,
+      loadSync: (_: string) => {
+        return {
+          tsConfigPath: undefined,
+          baseUrl: "./",
+          paths: {},
+        };
+      },
+    });
+
+    expect(result.tsConfigPath).toBeUndefined();
+  });
+
+  it("should use TS_NODE_PROJECT env if exists", () => {
+    const result = tsConfigLoader({
+      cwd: "/foo/bar",
+      getEnv: (key: string) =>
+        key === "TS_NODE_PROJECT" ? "/foo/baz" : undefined,
+      loadSync: (cwd: string, fileName: string) => {
+        if (cwd === "/foo/bar" && fileName === "/foo/baz") {
+          return {
+            tsConfigPath: "/foo/baz/tsconfig.json",
+            baseUrl: "./",
+            paths: {},
+          };
+        }
+
+        return {
+          tsConfigPath: undefined,
+          baseUrl: "./",
+          paths: {},
+        };
+      },
+    });
+
+    expect(result.tsConfigPath).toBe("/foo/baz/tsconfig.json");
+  });
+
+  it("should use TS_NODE_BASEURL env if exists", () => {
+    const result = tsConfigLoader({
+      cwd: "/foo/bar",
+      getEnv: (key: string) =>
+        key === "TS_NODE_BASEURL" ? "SOME_BASEURL" : undefined,
+      loadSync: (_0: string, _1: string, baseUrl: string) => {
+        return {
+          tsConfigPath: undefined,
+          baseUrl,
+          paths: {},
+        };
+      },
+    });
+
+    expect(result.baseUrl).toBe("SOME_BASEURL");
+  });
+
+  it("should not use TS_NODE_BASEURL env if it does not exist", () => {
+    const result = tsConfigLoader({
+      cwd: "/foo/bar",
+      getEnv: (_: string) => {
+        return undefined;
+      },
+      loadSync: (_0: string, _1: string, baseUrl: string) => {
+        return {
+          tsConfigPath: undefined,
+          baseUrl,
+          paths: {},
+        };
+      },
+    });
+
+    expect(result.baseUrl).toBeUndefined();
+  });
+});
+
+describe("walkForTsConfig", () => {
+  it("should find tsconfig in starting directory", () => {
+    const pathToTsconfig = join("/root", "dir1", "tsconfig.json");
+    const mockFiles: Record<string, string[]> = {
+      "/root/dir1": ["tsconfig.json"],
+    };
+    const res = walkForTsConfig(
+      join("/root", "dir1"),
+      (path) => mockFiles[path] || []
+    );
+    expect(res).toBe(pathToTsconfig);
+  });
+
+  it("should find jsconfig in starting directory", () => {
+    const pathToJsconfig = join("/root", "dir1", "jsconfig.json");
+    const mockFiles: Record<string, string[]> = {
+      "/root/dir1": ["jsconfig.json"],
+    };
+    const res = walkForTsConfig(
+      join("/root", "dir1"),
+      (path) => mockFiles[path] || []
+    );
+    expect(res).toBe(pathToJsconfig);
+  });
+
+  // see https://github.com/Microsoft/TypeScript/issues/15869#issuecomment-301845650
+  it("tsconfig.json take precedence over jsconfig.json when both exist", () => {
+    const pathToTsconfig = join("/root/dir1", "tsconfig.json");
+    const mockFiles: Record<string, string[]> = {
+      "/root/dir1": ["jsconfig.json", "tsconfig.json"],
+    };
+    const res = walkForTsConfig(
+      join("/root", "dir1"),
+      (path) => mockFiles[path] || []
+    );
+    expect(res).toBe(pathToTsconfig);
+  });
+
+  it("should find tsconfig in parent directory", () => {
+    const pathToTsconfig = join("/root", "tsconfig.json");
+    const mockFiles: Record<string, string[]> = {
+      "/root": ["tsconfig.json"],
+    };
+    const res = walkForTsConfig(
+      join("/root", "dir1"),
+      (path) => mockFiles[path] || []
+    );
+    expect(res).toBe(pathToTsconfig);
+  });
+
+  it("should find jsconfig in parent directory", () => {
+    const pathToTsconfig = join("/root", "jsconfig.json");
+    const mockFiles: Record<string, string[]> = {
+      "/root": ["jsconfig.json"],
+    };
+    const res = walkForTsConfig(
+      join("/root", "dir1"),
+      (path) => mockFiles[path] || []
+    );
+    expect(res).toBe(pathToTsconfig);
+  });
+
+  it("should return undefined when reaching the top", () => {
+    const res = walkForTsConfig(join("/root", "dir1", "kalle"), () => []);
+    expect(res).toBeUndefined();
+  });
+});
+
+describe("loadConfig", () => {
+  it("should load a config", () => {
+    const config = { compilerOptions: { baseUrl: "hej" } };
+    const res = loadTsconfig(
+      "/root/dir1/tsconfig.json",
+      (path) => path === "/root/dir1/tsconfig.json",
+      (_) => JSON.stringify(config)
+    );
+    expect(res).toStrictEqual(config);
+  });
+
+  it("should load a config with comments", () => {
+    const config = { compilerOptions: { baseUrl: "hej" } };
+    const res = loadTsconfig(
+      "/root/dir1/tsconfig.json",
+      (path) => path === "/root/dir1/tsconfig.json",
+      (_) => `{
+          // my comment
+          "compilerOptions": { 
+            "baseUrl": "hej"
+          }
+        }`
+    );
+    expect(res).toStrictEqual(config);
+  });
+
+  it("should load a config with trailing commas", () => {
+    const config = { compilerOptions: { baseUrl: "hej" } };
+    const res = loadTsconfig(
+      "/root/dir1/tsconfig.json",
+      (path) => path === "/root/dir1/tsconfig.json",
+      (_) => `{
+          "compilerOptions": { 
+            "baseUrl": "hej",
+          },
+        }`
+    );
+    expect(res).toStrictEqual(config);
+  });
+
+  it("should throw an error including the file path when encountering invalid JSON5", () => {
+    expect(() =>
+      loadTsconfig(
+        "/root/dir1/tsconfig.json",
+        (path) => path === "/root/dir1/tsconfig.json",
+        (_) => `{
+            "compilerOptions": {
+          }`
+      )
+    ).toThrowError(
+      "/root/dir1/tsconfig.json is malformed JSON5: invalid end of input at 3:12"
+    );
+  });
+
+  it("should load a config with string extends and overwrite all options", () => {
+    const firstConfig = {
+      extends: "../base-config.json",
+      compilerOptions: { baseUrl: "kalle", paths: { foo: ["bar2"] } },
+    };
+    const firstConfigPath = join("/root", "dir1", "tsconfig.json");
+    const baseConfig = {
+      compilerOptions: {
+        baseUrl: "olle",
+        paths: { foo: ["bar1"] },
+        strict: true,
+      },
+    };
+    const baseConfigPath = join("/root", "base-config.json");
+    const res = loadTsconfig(
+      join("/root", "dir1", "tsconfig.json"),
+      (path) => path === firstConfigPath || path === baseConfigPath,
+      (path) => {
+        if (path === firstConfigPath) {
+          return JSON.stringify(firstConfig);
+        }
+        if (path === baseConfigPath) {
+          return JSON.stringify(baseConfig);
+        }
+        return "";
+      }
+    );
+
+    expect(res).toEqual({
+      extends: "../base-config.json",
+      compilerOptions: {
+        baseUrl: "kalle",
+        paths: { foo: ["bar2"] },
+        strict: true,
+      },
+    });
+  });
+
+  it("should load a config with string extends from node_modules and overwrite all options", () => {
+    const firstConfig = {
+      extends: "my-package/base-config.json",
+      compilerOptions: { baseUrl: "kalle", paths: { foo: ["bar2"] } },
+    };
+    const firstConfigPath = join("/root", "dir1", "tsconfig.json");
+    const baseConfig = {
+      compilerOptions: {
+        baseUrl: "olle",
+        paths: { foo: ["bar1"] },
+        strict: true,
+      },
+    };
+    const baseConfigPath = join(
+      "/root",
+      "dir1",
+      "node_modules",
+      "my-package",
+      "base-config.json"
+    );
+    const res = loadTsconfig(
+      join("/root", "dir1", "tsconfig.json"),
+      (path) => path === firstConfigPath || path === baseConfigPath,
+      (path) => {
+        if (path === firstConfigPath) {
+          return JSON.stringify(firstConfig);
+        }
+        if (path === baseConfigPath) {
+          return JSON.stringify(baseConfig);
+        }
+        return "";
+      }
+    );
+
+    expect(res).toEqual({
+      extends: "my-package/base-config.json",
+      compilerOptions: {
+        baseUrl: "kalle",
+        paths: { foo: ["bar2"] },
+        strict: true,
+      },
+    });
+  });
+
+  it("should use baseUrl relative to location of extended tsconfig", () => {
+    const firstConfig = { compilerOptions: { baseUrl: "." } };
+    const firstConfigPath = join("/root", "first-config.json");
+    const secondConfig = { extends: "../first-config.json" };
+    const secondConfigPath = join("/root", "dir1", "second-config.json");
+    const thirdConfig = { extends: "../second-config.json" };
+    const thirdConfigPath = join("/root", "dir1", "dir2", "third-config.json");
+    const res = loadTsconfig(
+      join("/root", "dir1", "dir2", "third-config.json"),
+      (path) =>
+        path === firstConfigPath ||
+        path === secondConfigPath ||
+        path === thirdConfigPath,
+      (path) => {
+        if (path === firstConfigPath) {
+          return JSON.stringify(firstConfig);
+        }
+        if (path === secondConfigPath) {
+          return JSON.stringify(secondConfig);
+        }
+        if (path === thirdConfigPath) {
+          return JSON.stringify(thirdConfig);
+        }
+        return "";
+      }
+    );
+
+    expect(res).toEqual({
+      extends: "../second-config.json",
+      compilerOptions: { baseUrl: join("..", "..") },
+    });
+  });
+
+  it("should load a config with array extends and overwrite all options", () => {
+    const baseConfig1 = {
+      compilerOptions: { baseUrl: ".", paths: { foo: ["bar"] } },
+    };
+    const baseConfig1Path = join("/root", "base-config-1.json");
+    const baseConfig2 = { compilerOptions: { baseUrl: "." } };
+    const baseConfig2Path = join("/root", "dir1", "base-config-2.json");
+    const baseConfig3 = {
+      compilerOptions: { baseUrl: ".", paths: { foo: ["bar2"] } },
+    };
+    const baseConfig3Path = join("/root", "dir1", "dir2", "base-config-3.json");
+    const actualConfig = {
+      extends: [
+        "./base-config-1.json",
+        "./dir1/base-config-2.json",
+        "./dir1/dir2/base-config-3.json",
+      ],
+    };
+    const actualConfigPath = join("/root", "tsconfig.json");
+
+    const res = loadTsconfig(
+      join("/root", "tsconfig.json"),
+      (path) =>
+        [
+          baseConfig1Path,
+          baseConfig2Path,
+          baseConfig3Path,
+          actualConfigPath,
+        ].indexOf(path) >= 0,
+      (path) => {
+        if (path === baseConfig1Path) {
+          return JSON.stringify(baseConfig1);
+        }
+        if (path === baseConfig2Path) {
+          return JSON.stringify(baseConfig2);
+        }
+        if (path === baseConfig3Path) {
+          return JSON.stringify(baseConfig3);
+        }
+        if (path === actualConfigPath) {
+          return JSON.stringify(actualConfig);
+        }
+        return "";
+      }
+    );
+
+    expect(res).toEqual({
+      extends: [
+        "./base-config-1.json",
+        "./dir1/base-config-2.json",
+        "./dir1/dir2/base-config-3.json",
+      ],
+      compilerOptions: {
+        baseUrl: join("dir1", "dir2"),
+        paths: { foo: ["bar2"] },
+      },
+    });
+  });
+
+  it("should load a config with array extends without .json extension", () => {
+    const baseConfig = {
+      compilerOptions: { baseUrl: ".", paths: { foo: ["bar"] } },
+    };
+    const baseConfigPath = join("/root", "base-config-1.json");
+    const actualConfig = { extends: ["./base-config-1"] };
+    const actualConfigPath = join("/root", "tsconfig.json");
+
+    const res = loadTsconfig(
+      join("/root", "tsconfig.json"),
+      (path) => [baseConfigPath, actualConfigPath].indexOf(path) >= 0,
+      (path) => {
+        if (path === baseConfigPath) {
+          return JSON.stringify(baseConfig);
+        }
+        if (path === actualConfigPath) {
+          return JSON.stringify(actualConfig);
+        }
+        return "";
+      }
+    );
+
+    expect(res).toEqual({
+      extends: ["./base-config-1"],
+      compilerOptions: {
+        baseUrl: ".",
+        paths: { foo: ["bar"] },
+      },
+    });
+  });
+});

SerpentRace_Backend/node_modules/tsconfig-paths/src/__tests__/tsconfig-named.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../base-tsconfig.json",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "module": "commonjs",
+    "target": "es6",
+    "sourceMap": true,
+    "outDir": "./js_out"
+  }
+}