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denoland-deno/std/testing/asserts_test.ts
2020-06-13 10:01:05 -04:00

411 lines
10 KiB
TypeScript

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import {
assert,
assertNotEquals,
assertStringContains,
assertArrayContains,
assertMatch,
assertEquals,
assertStrictEquals,
assertThrows,
assertThrowsAsync,
AssertionError,
equal,
fail,
unimplemented,
unreachable,
} from "./asserts.ts";
import { red, green, gray, bold, 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 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");
let didThrow;
try {
assertNotEquals("Raptor", "Raptor");
didThrow = false;
} catch (e) {
assert(e instanceof AssertionError);
didThrow = true;
}
assertEquals(didThrow, true);
});
Deno.test("testingAssertStringContains", function (): void {
assertStringContains("Denosaurus", "saur");
assertStringContains("Denosaurus", "Deno");
assertStringContains("Denosaurus", "rus");
let didThrow;
try {
assertStringContains("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" }];
assertArrayContains(fixture, ["deno"]);
assertArrayContains(fixtureObject, [{ deno: "luv" }]);
assertThrows(
(): void => assertArrayContains(fixtureObject, [{ deno: "node" }]),
AssertionError,
`actual: "[ { deno: "luv" }, { deno: "Js" } ]" expected to contain: "[ { deno: "node" } ]"\nmissing: [ { deno: "node" } ]`
);
});
Deno.test("testingAssertStringContainsThrow", function (): void {
let didThrow = false;
try {
assertStringContains("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("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");
},
Error,
"Failed assertion: foo"
);
},
AssertionError,
`Expected error to be instance of "Error", but was "AssertionError"`
);
});
Deno.test("testingAssertThrowsWithReturnType", () => {
assertThrows(() => {
throw new Error();
return "a string";
});
});
Deno.test("testingAssertThrowsAsyncWithReturnType", () => {
assertThrowsAsync(() => {
throw new Error();
return Promise.resolve("a Promise<string>");
});
});
const createHeader = (): string[] => [
"",
"",
` ${gray(bold("[Diff]"))} ${red(bold("Actual"))} / ${green(
bold("Expected")
)}`,
"",
"",
];
const added: (s: string) => string = (s: string): string => green(bold(s));
const removed: (s: string) => string = (s: string): string => red(bold(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" } });
},
});
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,
[
"Values are not equal:",
...createHeader(),
removed(`- [ ${yellow("1")}, ${green('"2"')}, ${yellow("3")} ]`),
added(`+ [ ${green('"1"')}, ${green('"2"')}, ${yellow("3")} ]`),
"",
].join("\n")
);
},
});
Deno.test({
name: "failed with object",
fn(): void {
assertThrows(
(): void => assertEquals({ a: 1, b: "2", c: 3 }, { a: 1, b: 2, c: [3] }),
AssertionError,
[
"Values are not equal:",
...createHeader(),
removed(
`- { a: ${yellow("1")}, b: ${green('"2"')}, c: ${yellow("3")} }`
),
added(
`+ { a: ${yellow("1")}, b: ${yellow("2")}, c: [ ${yellow("3")} ] }`
),
"",
].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,
[
"Values are not strictly equal:",
...createHeader(),
removed(`- { a: ${yellow("1")}, b: ${yellow("2")} }`),
added(`+ { a: ${yellow("1")}, c: [ ${yellow("3")} ] }`),
"",
].join("\n")
);
},
});
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:\n",
red(` { a: ${yellow("1")}, b: ${yellow("2")} }`),
].join("\n")
);
},
});