mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-26 01:35:08 +02:00
109 lines
3.8 KiB
JavaScript
109 lines
3.8 KiB
JavaScript
test("simple escape characters", () => {
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expect("\n").toBe(String.fromCharCode(0x0a));
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expect("\r").toBe(String.fromCharCode(0x0d));
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expect("\t").toBe(String.fromCharCode(0x09));
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expect("\b").toBe(String.fromCharCode(0x08));
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expect("\f").toBe(String.fromCharCode(0x0c));
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expect("\v").toBe(String.fromCharCode(0x0b));
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expect("\0").toBe(String.fromCharCode(0x00));
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// Same in template literals.
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expect(`\n`).toBe(String.fromCharCode(0x0a));
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expect(`\r`).toBe(String.fromCharCode(0x0d));
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expect(`\t`).toBe(String.fromCharCode(0x09));
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expect(`\b`).toBe(String.fromCharCode(0x08));
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expect(`\f`).toBe(String.fromCharCode(0x0c));
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expect(`\v`).toBe(String.fromCharCode(0x0b));
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expect(`\0`).toBe(String.fromCharCode(0x00));
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});
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test("identity escapes", () => {
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expect("\'").toBe("'");
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expect('\"').toBe('"');
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expect("\\").toBe(String.fromCharCode(0x5c));
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expect("\a").toBe("a");
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expect("\q").toBe("q");
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// Same in template literals.
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expect(`\'`).toBe("'");
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expect(`\"`).toBe('"');
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expect(`\\`).toBe(String.fromCharCode(0x5c));
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expect(`\a`).toBe("a");
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expect(`\q`).toBe("q");
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});
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test("hex escapes", () => {
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expect("\x55").toBe("U");
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expect("X55").toBe("X55");
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expect(`\x55`).toBe("U");
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expect(`\X55`).toBe("X55");
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expect("\xff").toBe(String.fromCharCode(0xff));
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expect("\x00").toBe(String.fromCharCode(0x00));
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expect("'\\x'").not.toEval();
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expect("'\\x1'").not.toEval();
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expect("'\\xz'").not.toEval();
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expect("'\\xzz'").not.toEval();
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expect("'\\x🐞'").not.toEval();
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});
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test("unicode escapes", () => {
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expect("\u26a0").toBe("⚠");
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expect(`\u26a0`).toBe("⚠");
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expect("\u{1f41e}").toBe("🐞");
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expect(`\u{1f41e}`).toBe("🐞");
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expect("\u00ff").toBe(String.fromCharCode(0xff));
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expect("\u{0}").toBe(String.fromCharCode(0));
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expect("\u{41}").toBe("A");
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expect(`\u{41}`).toBe("A");
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expect("'\\u'").not.toEval();
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expect("'\\u1'").not.toEval();
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expect("'\\uf'").not.toEval();
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expect("'\\u123'").not.toEval();
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expect("'\\u123z'").not.toEval();
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expect("'\\uz'").not.toEval();
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expect("'\\uzz'").not.toEval();
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expect("'\\uzzzz'").not.toEval();
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expect("'\\u{'").not.toEval();
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expect("'\\u{}'").not.toEval();
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expect("'\\u{z}'").not.toEval();
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expect("'\\u🐞'").not.toEval();
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});
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describe("octal escapes", () => {
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test("basic functionality", () => {
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expect("\1").toBe("\u0001");
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expect("\2").toBe("\u0002");
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expect("\3").toBe("\u0003");
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expect("\4").toBe("\u0004");
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expect("\5").toBe("\u0005");
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expect("\6").toBe("\u0006");
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expect("\7").toBe("\u0007");
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// prettier-ignore
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expect("\8").toBe("8");
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// prettier-ignore
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expect("\9").toBe("9");
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expect("\128").toBe("\n8");
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expect("\141bc").toBe("abc");
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expect("f\157o\142a\162").toBe("foobar");
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expect("\123\145\162\145\156\151\164\171\117\123").toBe("SerenityOS");
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});
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test("syntax error in template literal", () => {
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expect("`\\123`").not.toEval();
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});
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test("syntax error in strict mode", () => {
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expect("'use strict'; '\\123'").not.toEval();
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expect('"use strict"; "\\123"').not.toEval();
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// Special case, string literal precedes use strict directive
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expect("'\\123'; 'use strict'").not.toEval();
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// Because of the non string statement in the middle strict mode is not enabled.
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expect("'\\123'; somethingElse; 'use strict'").toEval();
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});
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test("invalid octal escapes fail in strict mode", () => {
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expect("'use strict'; '\\8'").not.toEval();
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expect("'use strict'; '\\800'").not.toEval();
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expect("'use strict'; '\\9'").not.toEval();
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expect("'use strict'; '\\912'").not.toEval();
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});
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});
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