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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"] },
},
});
});
});