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assert.spec.js
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42 lines (35 loc) · 1.04 KB
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import assert from "../assert.js";
let testAssertMessageHead, testAssertMessage;
describe("assert", () => {
beforeEach(() => {
testAssertMessageHead = "Assertion failure: ";
testAssertMessage = "Test assert.js Message";
});
describe("when isDevelopment and the condition is truthy", () => {
it("does not throw an Error", () => {
expect(() => {
assert(true, testAssertMessage);
}).not.toThrow();
});
});
describe("when isDevelopment and the condition is falsy", () => {
it("throws an Error displaying the passed message", () => {
expect(() => {
assert(false, testAssertMessage);
}).toThrow(new Error(testAssertMessageHead + testAssertMessage));
});
});
describe("when not isDevelopment", () => {
beforeEach(() => {
process.env.NODE_ENV = "production";
});
afterEach(() => {
delete process.env.NODE_ENV;
});
it("does not throw an Error", () => {
expect(() => {
assert(false, testAssertMessage);
}).not.toThrow();
});
});
});