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denoland-deno/std/testing/asserts_test.ts
Bartek Iwańczuk 8e914be742
build: migrate to dlint (#8176)
This commit migrates repository from using "eslint" 
to "dlint" for linting JavaScript code.
2020-11-03 16:19:29 +01:00

927 lines
20 KiB
TypeScript

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import {
_format,
assert,
assertArrayIncludes,
assertEquals,
assertExists,
AssertionError,
assertMatch,
assertNotEquals,
assertNotMatch,
assertNotStrictEquals,
assertObjectMatch,
assertStrictEquals,
assertStringIncludes,
assertThrows,
assertThrowsAsync,
equal,
fail,
unimplemented,
unreachable,
} from "./asserts.ts";
import { bold, gray, green, red, stripColor, yellow } from "../fmt/colors.ts";
Deno.test("testingEqual", function (): void {
assert(equal("world", "world"));
assert(!equal("hello", "world"));
assert(equal(5, 5));
assert(!equal(5, 6));
assert(equal(NaN, NaN));
assert(equal({ hello: "world" }, { hello: "world" }));
assert(!equal({ world: "hello" }, { hello: "world" }));
assert(
equal(
{ hello: "world", hi: { there: "everyone" } },
{ hello: "world", hi: { there: "everyone" } },
),
);
assert(
!equal(
{ hello: "world", hi: { there: "everyone" } },
{ hello: "world", hi: { there: "everyone else" } },
),
);
assert(equal(/deno/, /deno/));
assert(!equal(/deno/, /node/));
assert(equal(new Date(2019, 0, 3), new Date(2019, 0, 3)));
assert(!equal(new Date(2019, 0, 3), new Date(2019, 1, 3)));
assert(
!equal(
new Date(2019, 0, 3, 4, 20, 1, 10),
new Date(2019, 0, 3, 4, 20, 1, 20),
),
);
assert(equal(new Date("Invalid"), new Date("Invalid")));
assert(!equal(new Date("Invalid"), new Date(2019, 0, 3)));
assert(!equal(new Date("Invalid"), new Date(2019, 0, 3, 4, 20, 1, 10)));
assert(equal(new Set([1]), new Set([1])));
assert(!equal(new Set([1]), new Set([2])));
assert(equal(new Set([1, 2, 3]), new Set([3, 2, 1])));
assert(equal(new Set([1, new Set([2, 3])]), new Set([new Set([3, 2]), 1])));
assert(!equal(new Set([1, 2]), new Set([3, 2, 1])));
assert(!equal(new Set([1, 2, 3]), new Set([4, 5, 6])));
assert(equal(new Set("denosaurus"), new Set("denosaurussss")));
assert(equal(new Map(), new Map()));
assert(
equal(
new Map([
["foo", "bar"],
["baz", "baz"],
]),
new Map([
["foo", "bar"],
["baz", "baz"],
]),
),
);
assert(
equal(
new Map([["foo", new Map([["bar", "baz"]])]]),
new Map([["foo", new Map([["bar", "baz"]])]]),
),
);
assert(
equal(
new Map([["foo", { bar: "baz" }]]),
new Map([["foo", { bar: "baz" }]]),
),
);
assert(
equal(
new Map([
["foo", "bar"],
["baz", "qux"],
]),
new Map([
["baz", "qux"],
["foo", "bar"],
]),
),
);
assert(equal(new Map([["foo", ["bar"]]]), new Map([["foo", ["bar"]]])));
assert(!equal(new Map([["foo", "bar"]]), new Map([["bar", "baz"]])));
assert(
!equal(
new Map([["foo", "bar"]]),
new Map([
["foo", "bar"],
["bar", "baz"],
]),
),
);
assert(
!equal(
new Map([["foo", new Map([["bar", "baz"]])]]),
new Map([["foo", new Map([["bar", "qux"]])]]),
),
);
assert(equal(new Map([[{ x: 1 }, true]]), new Map([[{ x: 1 }, true]])));
assert(!equal(new Map([[{ x: 1 }, true]]), new Map([[{ x: 1 }, false]])));
assert(!equal(new Map([[{ x: 1 }, true]]), new Map([[{ x: 2 }, true]])));
assert(equal([1, 2, 3], [1, 2, 3]));
assert(equal([1, [2, 3]], [1, [2, 3]]));
assert(!equal([1, 2, 3, 4], [1, 2, 3]));
assert(!equal([1, 2, 3, 4], [1, 2, 3]));
assert(!equal([1, 2, 3, 4], [1, 4, 2, 3]));
assert(equal(new Uint8Array([1, 2, 3, 4]), new Uint8Array([1, 2, 3, 4])));
assert(!equal(new Uint8Array([1, 2, 3, 4]), new Uint8Array([2, 1, 4, 3])));
assert(
equal(new URL("https://example.test"), new URL("https://example.test")),
);
assert(
!equal(
new URL("https://example.test"),
new URL("https://example.test/with-path"),
),
);
});
Deno.test("testingNotEquals", function (): void {
const a = { foo: "bar" };
const b = { bar: "foo" };
assertNotEquals(a, b);
assertNotEquals("Denosaurus", "Tyrannosaurus");
assertNotEquals(
new Date(2019, 0, 3, 4, 20, 1, 10),
new Date(2019, 0, 3, 4, 20, 1, 20),
);
assertNotEquals(
new Date("invalid"),
new Date(2019, 0, 3, 4, 20, 1, 20),
);
let didThrow;
try {
assertNotEquals("Raptor", "Raptor");
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
});
Deno.test("testingAssertExists", function (): void {
assertExists("Denosaurus");
assertExists(false);
assertExists(0);
assertExists("");
assertExists(-0);
assertExists(0);
assertExists(NaN);
let didThrow;
try {
assertExists(undefined);
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
didThrow = false;
try {
assertExists(null);
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
});
Deno.test("testingAssertStringContains", function (): void {
assertStringIncludes("Denosaurus", "saur");
assertStringIncludes("Denosaurus", "Deno");
assertStringIncludes("Denosaurus", "rus");
let didThrow;
try {
assertStringIncludes("Denosaurus", "Raptor");
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
});
Deno.test("testingArrayContains", function (): void {
const fixture = ["deno", "iz", "luv"];
const fixtureObject = [{ deno: "luv" }, { deno: "Js" }];
assertArrayIncludes(fixture, ["deno"]);
assertArrayIncludes(fixtureObject, [{ deno: "luv" }]);
assertArrayIncludes(
Uint8Array.from([1, 2, 3, 4]),
Uint8Array.from([1, 2, 3]),
);
assertThrows(
(): void => assertArrayIncludes(fixtureObject, [{ deno: "node" }]),
AssertionError,
`actual: "[
{
deno: "luv",
},
{
deno: "Js",
},
]" expected to include: "[
{
deno: "node",
},
]"
missing: [
{
deno: "node",
},
]`,
);
});
Deno.test("testingAssertStringContainsThrow", function (): void {
let didThrow = false;
try {
assertStringIncludes("Denosaurus from Jurassic", "Raptor");
} catch (e) {
assert(
e.message ===
`actual: "Denosaurus from Jurassic" expected to contain: "Raptor"`,
);
assert(e instanceof AssertionError);
didThrow = true;
}
assert(didThrow);
});
Deno.test("testingAssertStringMatching", function (): void {
assertMatch("foobar@deno.com", RegExp(/[a-zA-Z]+@[a-zA-Z]+.com/));
});
Deno.test("testingAssertStringMatchingThrows", function (): void {
let didThrow = false;
try {
assertMatch("Denosaurus from Jurassic", RegExp(/Raptor/));
} catch (e) {
assert(
e.message ===
`actual: "Denosaurus from Jurassic" expected to match: "/Raptor/"`,
);
assert(e instanceof AssertionError);
didThrow = true;
}
assert(didThrow);
});
Deno.test("testingAssertStringNotMatching", function (): void {
assertNotMatch("foobar.deno.com", RegExp(/[a-zA-Z]+@[a-zA-Z]+.com/));
});
Deno.test("testingAssertStringNotMatchingThrows", function (): void {
let didThrow = false;
try {
assertNotMatch("Denosaurus from Jurassic", RegExp(/from/));
} catch (e) {
assert(
e.message ===
`actual: "Denosaurus from Jurassic" expected to not match: "/from/"`,
);
assert(e instanceof AssertionError);
didThrow = true;
}
assert(didThrow);
});
Deno.test("testingAssertObjectMatching", function (): void {
const sym = Symbol("foo");
const a = { foo: true, bar: false };
const b = { ...a, baz: a };
const c = { ...b, qux: b };
const d = { corge: c, grault: c };
const e = { foo: true } as { [key: string]: unknown };
e.bar = e;
const f = { [sym]: true, bar: false };
// Simple subset
assertObjectMatch(a, {
foo: true,
});
// Subset with another subset
assertObjectMatch(b, {
foo: true,
baz: { bar: false },
});
// Subset with multiple subsets
assertObjectMatch(c, {
foo: true,
baz: { bar: false },
qux: {
baz: { foo: true },
},
});
// Subset with same object reference as subset
assertObjectMatch(d, {
corge: {
foo: true,
qux: { bar: false },
},
grault: {
bar: false,
qux: { foo: true },
},
});
// Subset with circular reference
assertObjectMatch(e, {
foo: true,
bar: {
bar: {
bar: {
foo: true,
},
},
},
});
// Subset with same symbol
assertObjectMatch(f, {
[sym]: true,
});
// Missing key
{
let didThrow;
try {
assertObjectMatch({
foo: true,
}, {
foo: true,
bar: false,
});
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
}
// Simple subset
{
let didThrow;
try {
assertObjectMatch(a, {
foo: false,
});
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
}
// Subset with another subset
{
let didThrow;
try {
assertObjectMatch(b, {
foo: true,
baz: { bar: true },
});
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
}
// Subset with multiple subsets
{
let didThrow;
try {
assertObjectMatch(c, {
foo: true,
baz: { bar: false },
qux: {
baz: { foo: false },
},
});
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
}
// Subset with same object reference as subset
{
let didThrow;
try {
assertObjectMatch(d, {
corge: {
foo: true,
qux: { bar: true },
},
grault: {
bar: false,
qux: { foo: false },
},
});
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
}
// Subset with circular reference
{
let didThrow;
try {
assertObjectMatch(e, {
foo: true,
bar: {
bar: {
bar: {
foo: false,
},
},
},
});
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
}
// Subset with symbol key but with string key subset
{
let didThrow;
try {
assertObjectMatch(f, {
foo: true,
});
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
}
});
Deno.test("testingAssertsUnimplemented", function (): void {
let didThrow = false;
try {
unimplemented();
} catch (e) {
assert(e.message === "unimplemented");
assert(e instanceof AssertionError);
didThrow = true;
}
assert(didThrow);
});
Deno.test("testingAssertsUnreachable", function (): void {
let didThrow = false;
try {
unreachable();
} catch (e) {
assert(e.message === "unreachable");
assert(e instanceof AssertionError);
didThrow = true;
}
assert(didThrow);
});
Deno.test("testingAssertFail", function (): void {
assertThrows(fail, AssertionError, "Failed assertion.");
assertThrows(
(): void => {
fail("foo");
},
AssertionError,
"Failed assertion: foo",
);
});
Deno.test("testingAssertFailWithWrongErrorClass", function (): void {
assertThrows(
(): void => {
//This next assertThrows will throw an AssertionError due to the wrong
//expected error class
assertThrows(
(): void => {
fail("foo");
},
TypeError,
"Failed assertion: foo",
);
},
AssertionError,
`Expected error to be instance of "TypeError", but was "AssertionError"`,
);
});
Deno.test("testingAssertThrowsWithReturnType", () => {
assertThrows(() => {
throw new Error();
});
});
Deno.test("testingAssertThrowsAsyncWithReturnType", () => {
assertThrowsAsync(() => {
throw new Error();
});
});
const createHeader = (): string[] => [
"",
"",
` ${gray(bold("[Diff]"))} ${red(bold("Actual"))} / ${
green(
bold("Expected"),
)
}`,
"",
"",
];
const added: (s: string) => string = (s: string): string =>
green(bold(stripColor(s)));
const removed: (s: string) => string = (s: string): string =>
red(bold(stripColor(s)));
Deno.test({
name: "pass case",
fn(): void {
assertEquals({ a: 10 }, { a: 10 });
assertEquals(true, true);
assertEquals(10, 10);
assertEquals("abc", "abc");
assertEquals({ a: 10, b: { c: "1" } }, { a: 10, b: { c: "1" } });
assertEquals(new Date("invalid"), new Date("invalid"));
},
});
Deno.test({
name: "failed with number",
fn(): void {
assertThrows(
(): void => assertEquals(1, 2),
AssertionError,
[
"Values are not equal:",
...createHeader(),
removed(`- ${yellow("1")}`),
added(`+ ${yellow("2")}`),
"",
].join("\n"),
);
},
});
Deno.test({
name: "failed with number vs string",
fn(): void {
assertThrows(
(): void => assertEquals(1, "1"),
AssertionError,
[
"Values are not equal:",
...createHeader(),
removed(`- ${yellow("1")}`),
added(`+ "1"`),
].join("\n"),
);
},
});
Deno.test({
name: "failed with array",
fn(): void {
assertThrows(
(): void => assertEquals([1, "2", 3], ["1", "2", 3]),
AssertionError,
`
[
- 1,
+ "1",
"2",
3,
]`,
);
},
});
Deno.test({
name: "failed with object",
fn(): void {
assertThrows(
(): void => assertEquals({ a: 1, b: "2", c: 3 }, { a: 1, b: 2, c: [3] }),
AssertionError,
`
{
a: 1,
+ b: 2,
+ c: [
+ 3,
+ ],
- b: "2",
- c: 3,
}`,
);
},
});
Deno.test({
name: "failed with date",
fn(): void {
assertThrows(
(): void =>
assertEquals(
new Date(2019, 0, 3, 4, 20, 1, 10),
new Date(2019, 0, 3, 4, 20, 1, 20),
),
AssertionError,
[
"Values are not equal:",
...createHeader(),
removed(`- ${new Date(2019, 0, 3, 4, 20, 1, 10).toISOString()}`),
added(`+ ${new Date(2019, 0, 3, 4, 20, 1, 20).toISOString()}`),
"",
].join("\n"),
);
assertThrows(
(): void =>
assertEquals(
new Date("invalid"),
new Date(2019, 0, 3, 4, 20, 1, 20),
),
AssertionError,
[
"Values are not equal:",
...createHeader(),
removed(`- ${new Date("invalid")}`),
added(`+ ${new Date(2019, 0, 3, 4, 20, 1, 20).toISOString()}`),
"",
].join("\n"),
);
},
});
Deno.test({
name: "strict pass case",
fn(): void {
assertStrictEquals(true, true);
assertStrictEquals(10, 10);
assertStrictEquals("abc", "abc");
const xs = [1, false, "foo"];
const ys = xs;
assertStrictEquals(xs, ys);
const x = { a: 1 };
const y = x;
assertStrictEquals(x, y);
},
});
Deno.test({
name: "strict failed with structure diff",
fn(): void {
assertThrows(
(): void => assertStrictEquals({ a: 1, b: 2 }, { a: 1, c: [3] }),
AssertionError,
`
{
a: 1,
+ c: [
+ 3,
+ ],
- b: 2,
}`,
);
},
});
Deno.test({
name: "strict failed with reference diff",
fn(): void {
assertThrows(
(): void => assertStrictEquals({ a: 1, b: 2 }, { a: 1, b: 2 }),
AssertionError,
`Values have the same structure but are not reference-equal:
{
a: 1,
b: 2,
}`,
);
},
});
Deno.test({
name: "strictly unequal pass case",
fn(): void {
assertNotStrictEquals(true, false);
assertNotStrictEquals(10, 11);
assertNotStrictEquals("abc", "xyz");
assertNotStrictEquals(1, "1");
const xs = [1, false, "foo"];
const ys = [1, true, "bar"];
assertNotStrictEquals(xs, ys);
const x = { a: 1 };
const y = { a: 2 };
assertNotStrictEquals(x, y);
},
});
Deno.test({
name: "strictly unequal fail case",
fn(): void {
assertThrows(() => assertNotStrictEquals(1, 1), AssertionError);
},
});
Deno.test({
name: "assert* functions with specified type parameter",
fn(): void {
assertEquals<string>("hello", "hello");
assertNotEquals<number>(1, 2);
assertArrayIncludes<boolean>([true, false], [true]);
const value = { x: 1 };
assertStrictEquals<typeof value>(value, value);
// deno-lint-ignore ban-types
assertNotStrictEquals<object>(value, { x: 1 });
},
});
Deno.test("Assert Throws Non-Error Fail", () => {
assertThrows(
() => {
assertThrows(
() => {
throw "Panic!";
},
String,
"Panic!",
);
},
AssertionError,
"A non-Error object was thrown.",
);
assertThrows(
() => {
assertThrows(() => {
throw null;
});
},
AssertionError,
"A non-Error object was thrown.",
);
assertThrows(
() => {
assertThrows(() => {
throw undefined;
});
},
AssertionError,
"A non-Error object was thrown.",
);
});
Deno.test("Assert Throws Async Non-Error Fail", () => {
assertThrowsAsync(
() => {
return assertThrowsAsync(
() => {
return Promise.reject("Panic!");
},
String,
"Panic!",
);
},
AssertionError,
"A non-Error object was thrown or rejected.",
);
assertThrowsAsync(
() => {
return assertThrowsAsync(() => {
return Promise.reject(null);
});
},
AssertionError,
"A non-Error object was thrown or rejected.",
);
assertThrowsAsync(
() => {
return assertThrowsAsync(() => {
return Promise.reject(undefined);
});
},
AssertionError,
"A non-Error object was thrown or rejected.",
);
assertThrowsAsync(
() => {
return assertThrowsAsync(() => {
throw undefined;
});
},
AssertionError,
"A non-Error object was thrown or rejected.",
);
});
Deno.test("assertEquals diff for differently ordered objects", () => {
assertThrows(
() => {
assertEquals(
{
aaaaaaaaaaaaaaaaaaaaaaaa: 0,
bbbbbbbbbbbbbbbbbbbbbbbb: 0,
ccccccccccccccccccccccc: 0,
},
{
ccccccccccccccccccccccc: 1,
aaaaaaaaaaaaaaaaaaaaaaaa: 0,
bbbbbbbbbbbbbbbbbbbbbbbb: 0,
},
);
},
AssertionError,
`
{
aaaaaaaaaaaaaaaaaaaaaaaa: 0,
bbbbbbbbbbbbbbbbbbbbbbbb: 0,
- ccccccccccccccccccccccc: 0,
+ ccccccccccccccccccccccc: 1,
}`,
);
});
// Check that the diff formatter overrides some default behaviours of
// `Deno.inspect()` which are problematic for diffing.
Deno.test("assert diff formatting", () => {
// Wraps objects into multiple lines even when they are small. Prints trailing
// commas.
assertEquals(
stripColor(_format({ a: 1, b: 2 })),
`{
a: 1,
b: 2,
}`,
);
// Same for nested small objects.
assertEquals(
stripColor(_format([{ x: { a: 1, b: 2 }, y: ["a", "b"] }])),
`[
{
x: {
a: 1,
b: 2,
},
y: [
"a",
"b",
],
},
]`,
);
// Grouping is disabled.
assertEquals(
stripColor(_format(["i", "i", "i", "i", "i", "i", "i"])),
`[
"i",
"i",
"i",
"i",
"i",
"i",
"i",
]`,
);
});
Deno.test("Assert Throws Parent Error", () => {
assertThrows(
() => {
throw new AssertionError("Fail!");
},
Error,
"Fail!",
);
});
Deno.test("Assert Throws Async Parent Error", () => {
assertThrowsAsync(
() => {
throw new AssertionError("Fail!");
},
Error,
"Fail!",
);
});