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/*
These tests deliberately produce syntax errors to check what line the parser thinks we're on.
Note that line numbers are higher than you might expect as the parsed code is:
function anonymous(
) {
<code>
}
⚠ PLEASE MAKE SURE TO NOT LET YOUR EDITOR REMOVE THE LS/PS LINE TERMINATORS!
*/
test("LINE FEED is a line terminator", () => {
expect(() => {
Function("\n\n@");
}).toThrowWithMessage(
SyntaxError,
"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
);
});
test("CARRIAGE RETURN is a line terminator", () => {
expect(() => {
Function("\r\r@");
}).toThrowWithMessage(
SyntaxError,
"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
);
});
test("LINE SEPARATOR is a line terminator", () => {
expect(() => {
Function("
@");
}).toThrowWithMessage(
SyntaxError,
"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
);
});
test("PARAGRAPH SEPARATOR is a line terminator", () => {
expect(() => {
Function("
@");
}).toThrowWithMessage(
SyntaxError,
"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
);
});
test("CR LF is counted as only one line terminator", () => {
expect(() => {
Function("\r\n\r\n@");
}).toThrowWithMessage(
SyntaxError,
"Unexpected token Invalid. Expected CurlyClose (line: 4, column: 1)"
);
});
test("LF/CR are not allowed in string literal", () => {
expect(() => {
Function(`"
"`);
}).toThrowWithMessage(SyntaxError, "Unexpected token UnterminatedStringLiteral");
});
test("LS/PS are allowed in string literal", () => {
expect(`"
"`).toEval();
expect(`"
"`).toEval();
});
test("line terminators can be mixed (but please don't)", () => {
expect(() => {
Function("\r
\r\n
\n\r@");
}).toThrowWithMessage(
SyntaxError,
"Unexpected token Invalid. Expected CurlyClose (line: 8, column: 1)"
);
});
test("all line terminators are valid for line continuations", () => {
expect(Function('return "a\\\nb"')()).toBe("ab");
expect(Function('return "a\\\rb"')()).toBe("ab");
expect(Function('return "a\\\r\nb"')()).toBe("ab");
expect(Function('return "a\\
b"')()).toBe("ab");
expect(Function('return "a\\
b"')()).toBe("ab");
});
test("template-literals raw and real value", () => {
let lastTemplate;
let lastRaw;
function tag(cs) {
lastTemplate = cs[0];
lastRaw = cs.raw[0];
}
function checkTemplate(string_value, expected_template, expected_raw) {
eval("tag`" + string_value + "`");
expect(lastTemplate).toBe(expected_template);
expect(lastRaw).toBe(expected_raw);
}
checkTemplate("", "", "");
checkTemplate("\n", "\n", "\n");
checkTemplate("\r", "\n", "\n");
checkTemplate("\r\n", "\n", "\n");
checkTemplate("\n\r\n", "\n\n", "\n\n");
checkTemplate("a\\\nb", "ab", "a\\\nb");
checkTemplate("a\\\rb", "ab", "a\\\nb");
checkTemplate("a\\
b", "ab", "a\\
b");
checkTemplate("a\\
b", "ab", "a\\
b");
});
|
