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LibJS: Add SuppressedError{, Prototype, Constructor}

This commit is contained in:
davidot 2022-12-06 02:10:01 +01:00 committed by Linus Groh
parent 0d8bab82f0
commit 3353cf68f1
14 changed files with 300 additions and 0 deletions

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describe("normal behavior", () => {
test("length is 2", () => {
expect(SuppressedError).toHaveLength(3);
});
test("name is SuppressedError", () => {
expect(SuppressedError.name).toBe("SuppressedError");
});
test("Prototype of the SuppressedError constructor is the Error constructor", () => {
expect(Object.getPrototypeOf(SuppressedError)).toBe(Error);
});
test("Prototype of SuppressedError.prototype is Error.prototype", () => {
expect(Object.getPrototypeOf(SuppressedError.prototype)).toBe(Error.prototype);
});
test("construction", () => {
expect(SuppressedError()).toBeInstanceOf(SuppressedError);
expect(SuppressedError(1)).toBeInstanceOf(SuppressedError);
expect(SuppressedError(1, 1)).toBeInstanceOf(SuppressedError);
expect(new SuppressedError()).toBeInstanceOf(SuppressedError);
expect(new SuppressedError(1)).toBeInstanceOf(SuppressedError);
expect(new SuppressedError(1, 1)).toBeInstanceOf(SuppressedError);
expect(Object.hasOwn(new SuppressedError(1, 1), "message")).toBeFalse();
expect(new SuppressedError().toString()).toBe("SuppressedError");
expect(new SuppressedError(1).toString()).toBe("SuppressedError");
expect(new SuppressedError(1, 1).toString()).toBe("SuppressedError");
expect(new SuppressedError(undefined, undefined, "Foo").toString()).toBe(
"SuppressedError: Foo"
);
expect(new SuppressedError(1, 1, "Foo").toString()).toBe("SuppressedError: Foo");
expect(Object.hasOwn(new SuppressedError(), "error")).toBeTrue();
expect(Object.hasOwn(new SuppressedError(), "suppressed")).toBeTrue();
const obj = {};
expect(new SuppressedError(obj).error).toBe(obj);
expect(new SuppressedError(null, obj).suppressed).toBe(obj);
});
test("converts message to string", () => {
expect(new SuppressedError(undefined, undefined, 1)).toHaveProperty("message", "1");
expect(new SuppressedError(undefined, undefined, {})).toHaveProperty(
"message",
"[object Object]"
);
});
test("supports options object with cause", () => {
const cause = new Error();
const error = new SuppressedError(1, 2, "test", { cause });
expect(error.hasOwnProperty("cause")).toBeTrue();
expect(error.cause).toBe(cause);
const errorWithoutCase = new SuppressedError(1, 2, "test");
expect(errorWithoutCase.hasOwnProperty("cause")).toBeFalse();
});
});

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describe("normal behavior", () => {
test("initial message value is empty string", () => {
expect(SuppressedError.prototype.message).toBe("");
});
test("Error gets message via prototype by default", () => {
const error = new SuppressedError();
expect(error.hasOwnProperty("message")).toBeFalse();
expect(error.message).toBe("");
SuppressedError.prototype.message = "Well hello friends";
expect(error.message).toBe("Well hello friends");
});
test("Error gets message via object if given to constructor", () => {
const error = new SuppressedError(undefined, undefined, "Custom error message");
expect(error.hasOwnProperty("message")).toBeTrue();
expect(error.message).toBe("Custom error message");
SuppressedError.prototype.message = "Well hello friends";
expect(error.message).toBe("Custom error message");
});
});

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describe("normal behavior", () => {
test("initial name value is type name", () => {
expect(SuppressedError.prototype.name).toBe("SuppressedError");
});
test("Error gets name via prototype", () => {
const error = new SuppressedError([]);
expect(error.hasOwnProperty("name")).toBeFalse();
expect(error.name).toBe("SuppressedError");
SuppressedError.prototype.name = "Foo";
expect(error.name).toBe("Foo");
});
});