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mod_test.ts
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mod_test.ts
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import {
assertEquals,
assertRejects,
assertThrows,
} from "../testing/asserts.ts";
import { config, configSync, MissingEnvVarsError, parse } from "./mod.ts";
import * as path from "../path/mod.ts";
const moduleDir = path.dirname(path.fromFileUrl(import.meta.url));
const testdataDir = path.resolve(moduleDir, "testdata");
const testOptions = {
path: path.join(testdataDir, "./.env"),
defaults: path.join(testdataDir, "./.env.defaults"),
};
Deno.test("parser", () => {
const testDotenv = Deno.readTextFileSync(
path.join(testdataDir, "./.env.test"),
);
const config = parse(testDotenv);
assertEquals(config.BASIC, "basic", "parses a basic variable");
assertEquals(config.AFTER_EMPTY, "empty", "skips empty lines");
assertEquals(config["#COMMENT"], undefined, "skips lines with comments");
assertEquals(config.EMPTY_VALUE, "", "empty values are empty strings");
assertEquals(
config.QUOTED_SINGLE,
"single quoted",
"single quotes are escaped",
);
assertEquals(
config.QUOTED_DOUBLE,
"double quoted",
"double quotes are escaped",
);
assertEquals(
config.MULTILINE,
"hello\nworld",
"new lines are expanded in double quotes",
);
assertEquals(
JSON.parse(config.JSON).foo,
"bar",
"inner quotes are maintained",
);
assertEquals(
config.WHITESPACE,
" whitespace ",
"whitespace in single-quoted values is preserved",
);
assertEquals(
config.WHITESPACE_DOUBLE,
" whitespace ",
"whitespace in double-quoted values is preserved",
);
assertEquals(
config.MULTILINE_SINGLE_QUOTE,
"hello\\nworld",
"new lines are escaped in single quotes",
);
assertEquals(config.EQUALS, "equ==als", "handles equals inside string");
assertEquals(
config.VAR_WITH_SPACE,
"var with space",
"variables defined with spaces are parsed",
);
assertEquals(
config.VAR_WITH_ENDING_WHITESPACE,
"value",
"variables defined with ending whitespace are trimmed",
);
assertEquals(
config.V4R_W1TH_NUM8ER5,
"var with numbers",
"accepts variables containing number",
);
assertEquals(
config["1INVALID"],
undefined,
"variables beginning with a number are not parsed",
);
assertEquals(
config.INDENTED_VAR,
"indented var",
"accepts variables that are indented with space",
);
assertEquals(
config.INDENTED_VALUE,
"indented value",
"accepts values that are indented with space",
);
assertEquals(
config.TAB_INDENTED_VAR,
"indented var",
"accepts variables that are indented with tabs",
);
assertEquals(
config.TAB_INDENTED_VALUE,
"indented value",
"accepts values that are indented with tabs",
);
});
Deno.test("with comments", () => {
const testDotenv = Deno.readTextFileSync(
path.join(testdataDir, "./.env.comments"),
);
const config = parse(testDotenv);
assertEquals(config.FOO, "bar");
assertEquals(config.GREETING, "hello world");
});
Deno.test("configure", () => {
let conf = configSync(testOptions);
assertEquals(conf.GREETING, "hello world", "fetches .env");
assertEquals(conf.DEFAULT1, "Some Default", "default value loaded");
conf = configSync({ ...testOptions, export: true });
assertEquals(
Deno.env.get("GREETING"),
"hello world",
"exports variables to env when requested",
);
Deno.env.set("DO_NOT_OVERRIDE", "Hello there");
conf = configSync({ ...testOptions, export: true });
assertEquals(
Deno.env.get("DO_NOT_OVERRIDE"),
"Hello there",
"does not export .env value if environment variable is already set",
);
assertEquals(
configSync(
{
path: "./.some.non.existent.env",
defaults: "./.some.non.existent.env",
},
),
{},
"returns empty object if file doesn't exist",
);
const originalDenoReadFileSync = Deno.readFileSync;
try {
// @ts-ignore: for test
delete Deno.readFileSync;
assertEquals(
configSync(testOptions),
{},
"returns empty object if Deno.readFileSync is not a function",
);
} finally {
Deno.readFileSync = originalDenoReadFileSync;
}
assertEquals(
configSync({
path: "./.some.non.existent.env",
defaults: testOptions.defaults,
}),
{ DEFAULT1: "Some Default" },
"returns with defaults if file doesn't exist",
);
});
Deno.test("configureSafe", () => {
// Default
let conf = configSync({
...testOptions,
safe: true,
});
assertEquals(conf.GREETING, "hello world", "fetches .env");
// Custom .env.example
conf = configSync({
safe: true,
...testOptions,
example: path.join(testdataDir, "./.env.example.test"),
});
assertEquals(
conf.GREETING,
"hello world",
"accepts a path to fetch env example from",
);
// Custom .env and .env.example
conf = configSync({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example.test"),
});
assertEquals(
conf.GREETING,
"hello world",
"accepts paths to fetch env and env example from",
);
// Throws if not all required vars are there
assertThrows(() => {
configSync({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
});
}, MissingEnvVarsError);
// Throws if any of the required vars is empty
assertThrows(() => {
configSync({
path: path.join(testdataDir, "./.env.safe.empty.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
});
}, MissingEnvVarsError);
// Does not throw if required vars are provided by example
configSync({
path: path.join(testdataDir, "./.env.safe.empty.test"),
safe: true,
example: path.join(testdataDir, "./.env.example3.test"),
defaults: path.join(moduleDir, "./.env.defaults"),
});
// Does not throw if any of the required vars is empty, *and* allowEmptyValues is present
configSync({
path: path.join(testdataDir, "./.env.safe.empty.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
allowEmptyValues: true,
});
// Does not throw if any of the required vars passed externally
Deno.env.set("ANOTHER", "VAR");
configSync({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
});
// Throws if any of the required vars passed externally is empty
Deno.env.set("ANOTHER", "");
assertThrows(() => {
configSync({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
});
});
// Does not throw if any of the required vars passed externally is empty, *and* allowEmptyValues is present
Deno.env.set("ANOTHER", "");
configSync({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
allowEmptyValues: true,
});
});
Deno.test("configure async", async () => {
let conf = await config(testOptions);
assertEquals(conf.GREETING, "hello world", "fetches .env");
assertEquals(conf.DEFAULT1, "Some Default", "default value loaded");
conf = await config({ path: path.join(testdataDir, "./.env.test") });
assertEquals(conf.BASIC, "basic", "accepts a path to fetch env from");
conf = await config({ ...testOptions, export: true });
assertEquals(
Deno.env.get("GREETING"),
"hello world",
"exports variables to env when requested",
);
Deno.env.set("DO_NOT_OVERRIDE", "Hello there");
conf = await config({ ...testOptions, export: true });
assertEquals(
Deno.env.get("DO_NOT_OVERRIDE"),
"Hello there",
"does not export .env value if environment variable is already set",
);
assertEquals(
await config(
{
path: "./.some.non.existent.env",
defaults: "./.some.non.existent.env",
},
),
{},
"returns empty object if file doesn't exist",
);
assertEquals(
await config({ ...testOptions, path: "./.some.non.existent.env" }),
{ DEFAULT1: "Some Default" },
"returns with defaults if file doesn't exist",
);
});
Deno.test("configureSafe async", async () => {
// Default
let conf = await config({
...testOptions,
safe: true,
});
assertEquals(conf.GREETING, "hello world", "fetches .env");
// Custom .env.example
conf = await config({
safe: true,
...testOptions,
example: path.join(testdataDir, "./.env.example.test"),
});
assertEquals(
conf.GREETING,
"hello world",
"accepts a path to fetch env example from",
);
// Custom .env and .env.example
conf = await config({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example.test"),
});
assertEquals(
conf.GREETING,
"hello world",
"accepts paths to fetch env and env example from",
);
// Throws if not all required vars are there
assertRejects(async () => {
await config({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
});
}, MissingEnvVarsError);
// Throws if any of the required vars is empty
assertRejects(async () => {
await config({
path: path.join(testdataDir, "./.env.safe.empty.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
});
}, MissingEnvVarsError);
// Does not throw if required vars are provided by example
await config({
path: path.join(testdataDir, "./.env.safe.empty.test"),
safe: true,
example: path.join(testdataDir, "./.env.example3.test"),
defaults: path.join(moduleDir, "./.env.defaults"),
});
// Does not throw if any of the required vars is empty, *and* allowEmptyValues is present
await config({
path: path.join(testdataDir, "./.env.safe.empty.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
allowEmptyValues: true,
});
// Does not throw if any of the required vars passed externally
Deno.env.set("ANOTHER", "VAR");
await config({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
});
// Throws if any of the required vars passed externally is empty
Deno.env.set("ANOTHER", "");
assertRejects(async () => {
await config({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
});
});
// Does not throw if any of the required vars passed externally is empty, *and* allowEmptyValues is present
Deno.env.set("ANOTHER", "");
await config({
path: path.join(testdataDir, "./.env.safe.test"),
safe: true,
example: path.join(testdataDir, "./.env.example2.test"),
allowEmptyValues: true,
});
});
Deno.test("config defaults", async () => {
const { stdout } = await Deno.spawn(Deno.execPath(), {
args: [
"run",
"--allow-read",
"--allow-env",
path.join(testdataDir, "./app_defaults.ts"),
],
cwd: testdataDir,
});
const decoder = new TextDecoder();
const conf = JSON.parse(decoder.decode(stdout).trim());
assertEquals(conf.GREETING, "hello world", "fetches .env by default");
assertEquals(conf.DEFAULT1, "Some Default", "default value loaded");
});