forked from scalameta/metals-vscode
/
getJavaHome.test.ts
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/
getJavaHome.test.ts
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import { IJavaHomeInfo } from "@viperproject/locate-java-home/js/es5/lib/interfaces";
import path from "path";
const exampleJavaVersionString = `openjdk "17.0.1" 2021-10-19
OpenJDK Runtime Environment (build 17.0.1+12-39)
OpenJDK 64-Bit Server VM (build 17.0.1+12-39, mixed mode, sharing)`;
describe("getJavaHome", () => {
const originalEnv = process.env;
beforeEach(() => {
process.env = { ...originalEnv };
delete process.env.JAVA_HOME;
delete process.env.PATH;
});
afterEach(() => {
process.env = originalEnv;
});
it("reads from JAVA_HOME", async () => {
const JAVA_HOME = path.join("/", "path", "to", "java");
process.env = { ...originalEnv, JAVA_HOME };
const javaPaths = [{ binPath: path.join(JAVA_HOME, "bin", "java") }];
mockSpawn(exampleJavaVersionString);
mockExistsFs(javaPaths);
const javaHome = await require("../getJavaHome").getJavaHome("17");
expect(javaHome).toBe(JAVA_HOME);
});
it("checks PATH variable", async () => {
const javaPaths = [
{
binPath: path.join("/", "test", "usr", "bin", "java"),
realPath: path.join(java11Jdk.path, "bin", "java"),
},
];
const PATH = path.join("/", "test", "usr", "bin");
mockLocateJavaHome([java11Jdk, java17Jdk]);
mockFs(javaPaths);
process.env = { PATH };
const javaHome = await require("../getJavaHome").getJavaHome("11");
expect(javaHome).toBe(java11Jdk.path);
});
// NOTE(gabro): we don't care about testing locate-java-home since it's an external dependency
// and we assume it works as expected. However, we want to test how we select a specific version
// when multiple installed Java are available.
it("falls back to installed Java", async () => {
mockLocateJavaHome([java11Jdk]);
const javaHome = await require("../getJavaHome").getJavaHome("11");
expect(javaHome).toBe(java11Jdk.path);
});
it("prefers installed JDK over JRE", async () => {
mockLocateJavaHome([java11Jre, java11Jdk]);
const javaHome = await require("../getJavaHome").getJavaHome("11");
expect(javaHome).toBe(java11Jdk.path);
});
it("prefers the most recent installed JDK 11", async () => {
mockLocateJavaHome([java11Jdk]);
const javaHome = await require("../getJavaHome").getJavaHome("11");
expect(javaHome).toBe(java11Jdk.path);
});
it("prefers the most recent installed JDK 17", async () => {
mockLocateJavaHome([java17Jdk, java11Jdk]);
const javaHome = await require("../getJavaHome").getJavaHome("17");
expect(javaHome).toBe(java17Jdk.path);
});
it("prefers the most recent security patch", async () => {
mockLocateJavaHome([java11Jdk, java11JdkNewPatch]);
const javaHome = await require("../getJavaHome").getJavaHome("11");
expect(javaHome).toBe(java11JdkNewPatch.path);
});
});
const java11Jdk = {
path: path.join("/", "path", "to", "java11jdk"),
version: "1.11.0",
security: 1,
isJDK: true,
};
const java17Jdk = {
path: path.join("/", "path", "to", "java17jdk"),
version: "1.17.0",
security: 1,
isJDK: true,
};
const java11Jre = {
path: path.join("/", "path", "to", "java11jdk"),
version: "1.11.0",
security: 1,
isJDK: false,
};
const java11JdkNewPatch = {
path: path.join("/", "path", "to", "java11jdk", "high", "security"),
version: "1.11.0",
security: 192,
isJDK: true,
};
function mockLocateJavaHome(
javas: { path: string; version: string; security: number; isJDK: boolean }[]
): void {
jest.resetModules();
jest
.spyOn(require("@viperproject/locate-java-home"), "default")
.mockImplementation((_options: unknown, cb: unknown) => {
(cb as (err: Error | null, found?: IJavaHomeInfo[]) => void)(
null,
javas.map((j) => ({
...j,
is64Bit: true,
executables: {
java: path.join(j.path, "bin", "java"),
javac: path.join(j.path, "bin", "javac"),
javap: path.join(j.path, "bin", "javap"),
},
}))
);
});
}
function mockFs(javaLinks: { binPath: String; realPath: String }[]): void {
mockExistsFs(javaLinks);
jest
.spyOn(require("fs"), "realpathSync")
.mockImplementation((path: unknown) => {
const value = javaLinks.find((o) => o.binPath == path);
if (value) {
return value.realPath;
} else {
return path;
}
});
}
function mockExistsFs(javaLinks: { binPath: String }[]): void {
jest
.spyOn(require("fs"), "existsSync")
.mockImplementation((path: unknown) => {
if (javaLinks.find((o) => o.binPath == path)) {
return true;
} else {
return false;
}
});
}
function mockSpawn(resultString: String): void {
jest
.spyOn(require("promisify-child-process"), "spawn")
.mockImplementation(() => {
return Promise.resolve({ stderr: resultString });
});
}