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feat(linter/eslint-plugin-promise): implement catch-or-return
Rule detail: [link](https://github.com/eslint-community/eslint-plugin-promise/blob/main/docs/rules/catch-or-return.md)
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Original file line number | Diff line number | Diff line change |
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use oxc_ast::{ | ||
ast::{CallExpression, Expression}, | ||
AstKind, | ||
}; | ||
use oxc_diagnostics::OxcDiagnostic; | ||
use oxc_macros::declare_oxc_lint; | ||
use oxc_span::Span; | ||
|
||
use crate::{ast_util::is_promise, context::LintContext, rule::Rule, AstNode}; | ||
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fn catch_or_return_diagnostic(x0: &str, span0: Span) -> OxcDiagnostic { | ||
OxcDiagnostic::warn(format!("eslint-plugin-promise(catch-or-return): Expected {x0} or return")) | ||
.with_label(span0) | ||
} | ||
|
||
#[derive(Debug, Default, Clone)] | ||
pub struct CatchOrReturn(Box<CatchOrReturnConfig>); | ||
|
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#[derive(Debug, Clone)] | ||
pub struct CatchOrReturnConfig { | ||
allow_finally: bool, | ||
allow_then: bool, | ||
termination_method: Vec<String>, | ||
} | ||
|
||
impl Default for CatchOrReturnConfig { | ||
fn default() -> Self { | ||
Self { | ||
allow_finally: false, | ||
allow_then: false, | ||
termination_method: vec!["catch".to_string()], | ||
} | ||
} | ||
} | ||
|
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impl std::ops::Deref for CatchOrReturn { | ||
type Target = CatchOrReturnConfig; | ||
|
||
fn deref(&self) -> &Self::Target { | ||
&self.0 | ||
} | ||
} | ||
|
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declare_oxc_lint!( | ||
/// ### What it does | ||
/// | ||
/// Ensure that each time a then() is applied to a promise, a catch() is applied as well. | ||
/// Exceptions are made if you are returning that promise. | ||
/// | ||
/// ### Why is this bad? | ||
/// | ||
/// Not catching errors in a promise can cause hard to debug problems or missing handling of | ||
/// error conditions. | ||
/// | ||
/// ### Example | ||
/// ```javascript | ||
/// myPromise.then(doSomething) | ||
/// myPromise.then(doSomething, catchErrors) // catch() may be a little better | ||
/// function doSomethingElse() { | ||
/// return myPromise.then(doSomething) | ||
/// } | ||
/// ``` | ||
CatchOrReturn, | ||
restriction, | ||
); | ||
|
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impl Rule for CatchOrReturn { | ||
fn from_configuration(value: serde_json::Value) -> Self { | ||
let mut config = CatchOrReturnConfig::default(); | ||
|
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if let Some(termination_array_config) = value | ||
.get(0) | ||
.and_then(|v| v.get("terminationMethod")) | ||
.and_then(serde_json::Value::as_array) | ||
{ | ||
config.termination_method = termination_array_config | ||
.iter() | ||
.filter_map(serde_json::Value::as_str) | ||
.map(ToString::to_string) | ||
.collect(); | ||
} | ||
|
||
if let Some(termination_string_config) = value | ||
.get(0) | ||
.and_then(|v| v.get("terminationMethod")) | ||
.and_then(serde_json::Value::as_str) | ||
{ | ||
config.termination_method = vec![termination_string_config.to_string()]; | ||
} | ||
|
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if let Some(allow_finally_config) = | ||
value.get(0).and_then(|v| v.get("allowFinally")).and_then(serde_json::Value::as_bool) | ||
{ | ||
config.allow_finally = allow_finally_config; | ||
} | ||
|
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if let Some(allow_then_config) = | ||
value.get(0).and_then(|v| v.get("allowThen")).and_then(serde_json::Value::as_bool) | ||
{ | ||
config.allow_then = allow_then_config; | ||
} | ||
|
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Self(Box::new(config)) | ||
} | ||
|
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fn run<'a>(&self, node: &AstNode<'a>, ctx: &LintContext<'a>) { | ||
let AstKind::ExpressionStatement(expr_stmt) = node.kind() else { | ||
return; | ||
}; | ||
|
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let Expression::CallExpression(call_expr) = &expr_stmt.expression else { | ||
return; | ||
}; | ||
|
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if !is_promise(call_expr) { | ||
return; | ||
} | ||
|
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if self.is_allowed_promise_termination(call_expr) { | ||
return; | ||
} | ||
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let termination_method = &self.termination_method[0]; | ||
ctx.diagnostic(catch_or_return_diagnostic(termination_method, call_expr.span)); | ||
} | ||
} | ||
|
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impl CatchOrReturn { | ||
fn is_allowed_promise_termination(&self, call_expr: &CallExpression) -> bool { | ||
let Some(member_expr) = call_expr.callee.get_member_expr() else { | ||
return false; | ||
}; | ||
|
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let Some(prop_name) = member_expr.static_property_name() else { | ||
return false; | ||
}; | ||
|
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// somePromise.then(a, b) | ||
if self.allow_then && prop_name == "then" && call_expr.arguments.len() == 2 { | ||
return true; | ||
} | ||
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// somePromise.catch().finally(fn) | ||
if self.allow_finally && prop_name == "finally" { | ||
let Expression::CallExpression(object_call_expr) = member_expr.object() else { | ||
return false; | ||
}; | ||
|
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if is_promise(object_call_expr) && self.is_allowed_promise_termination(object_call_expr) | ||
{ | ||
return true; | ||
} | ||
} | ||
|
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// somePromise.catch() | ||
if self.termination_method.contains(&prop_name.to_string()) { | ||
return true; | ||
} | ||
|
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// somePromise['catch']() | ||
if prop_name == "catch" | ||
&& matches!(call_expr.callee.get_inner_expression(), Expression::StringLiteral(_)) | ||
{ | ||
return true; | ||
} | ||
|
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false | ||
} | ||
} | ||
|
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#[test] | ||
fn test() { | ||
use crate::tester::Tester; | ||
|
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let pass = vec![ | ||
("frank().then(go).catch(doIt)", None), | ||
("frank().then(go).then().then().then().catch(doIt)", None), | ||
("frank().then(go).then().catch(function() { /* why bother */ })", None), | ||
("frank.then(go).then(to).catch(jail)", None), | ||
("Promise.resolve(frank).catch(jail)", None), | ||
(r#"Promise.resolve(frank)["catch"](jail)"#, None), | ||
("frank.then(to).finally(fn).catch(jail)", None), | ||
( | ||
r#"postJSON("/smajobber/api/reportJob.json") | ||
.then(()=>this.setState()) | ||
.catch(()=>this.setState())"#, | ||
None, | ||
), | ||
("function a() { return frank().then(go) }", None), | ||
("function a() { return frank().then(go).then().then().then() }", None), | ||
("function a() { return frank().then(go).then()}", None), | ||
("function a() { return frank.then(go).then(to) }", None), | ||
("frank().then(go).then(null, doIt)", Some(serde_json::json!([{ "allowThen": true }]))), | ||
( | ||
"frank().then(go).then().then().then().then(null, doIt)", | ||
Some(serde_json::json!([{ "allowThen": true }])), | ||
), | ||
( | ||
"frank().then(go).then().then(null, function() { /* why bother */ })", | ||
Some(serde_json::json!([{ "allowThen": true }])), | ||
), | ||
( | ||
"frank.then(go).then(to).then(null, jail)", | ||
Some(serde_json::json!([{ "allowThen": true }])), | ||
), | ||
("frank().then(a, b)", Some(serde_json::json!([{ "allowThen": true }]))), | ||
("frank().then(a).then(b).then(null, c)", Some(serde_json::json!([{ "allowThen": true }]))), | ||
("frank().then(a).then(b).then(c, d)", Some(serde_json::json!([{ "allowThen": true }]))), | ||
( | ||
"frank().then(a).then(b).then().then().then(null, doIt)", | ||
Some(serde_json::json!([{ "allowThen": true }])), | ||
), | ||
( | ||
"frank().then(a).then(b).then(null, function() { /* why bother */ })", | ||
Some(serde_json::json!([{ "allowThen": true }])), | ||
), | ||
("frank().then(go).then(zam, doIt)", Some(serde_json::json!([{ "allowThen": true }]))), | ||
( | ||
"frank().then(go).then().then().then().then(wham, doIt)", | ||
Some(serde_json::json!([{ "allowThen": true }])), | ||
), | ||
( | ||
"frank().then(go).then().then(function() {}, function() { /* why bother */ })", | ||
Some(serde_json::json!([{ "allowThen": true }])), | ||
), | ||
( | ||
"frank.then(go).then(to).then(pewPew, jail)", | ||
Some(serde_json::json!([{ "allowThen": true }])), | ||
), | ||
( | ||
"frank().then(go).catch(doIt).finally(fn)", | ||
Some(serde_json::json!([{ "allowFinally": true }])), | ||
), | ||
( | ||
"frank().then(go).then().then().then().catch(doIt).finally(fn)", | ||
Some(serde_json::json!([{ "allowFinally": true }])), | ||
), | ||
( | ||
"frank().then(go).then().catch(function() { /* why bother */ }).finally(fn)", | ||
Some(serde_json::json!([{ "allowFinally": true }])), | ||
), | ||
("frank().then(goo).done()", Some(serde_json::json!([{ "terminationMethod": "done" }]))), | ||
( | ||
"frank().then(go).catch()", | ||
Some(serde_json::json!([{ "terminationMethod": ["catch", "done"] }])), | ||
), | ||
( | ||
"frank().then(go).done()", | ||
Some(serde_json::json!([{ "terminationMethod": ["catch", "done"] }])), | ||
), | ||
( | ||
"frank().then(go).finally()", | ||
Some(serde_json::json!([{ "terminationMethod": ["catch", "finally"] }])), | ||
), | ||
("nonPromiseExpressionStatement();", None), | ||
("frank().then(go)['catch']", None), | ||
]; | ||
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let fail = vec![ | ||
("function callPromise(promise, cb) { promise.then(cb) }", None), | ||
(r#"fetch("http://www.yahoo.com").then(console.log.bind(console))"#, None), | ||
(r#"a.then(function() { return "x"; }).then(function(y) { throw y; })"#, None), | ||
("Promise.resolve(frank)", None), | ||
("Promise.all([])", None), | ||
("Promise.allSettled([])", None), | ||
("Promise.any([])", None), | ||
("Promise.race([])", None), | ||
("frank().then(to).catch(fn).then(foo)", None), | ||
("frank().finally(fn)", None), | ||
("frank().then(to).finally(fn)", None), | ||
("frank().then(go).catch(doIt).finally(fn)", None), | ||
("frank().then(go).then().then().then().catch(doIt).finally(fn)", None), | ||
("frank().then(go).then().catch(function() { /* why bother */ }).finally(fn)", None), | ||
("function a() { frank().then(go) }", None), | ||
("function a() { frank().then(go).then().then().then() }", None), | ||
("function a() { frank().then(go).then()}", None), | ||
("function a() { frank.then(go).then(to) }", None), | ||
( | ||
"frank().then(go).catch(doIt).finally(fn).then(foo)", | ||
Some(serde_json::json!([{ "allowFinally": true }])), | ||
), | ||
( | ||
"frank().then(go).catch(doIt).finally(fn).foobar(foo)", | ||
Some(serde_json::json!([{ "allowFinally": true }])), | ||
), | ||
("frank().then(go)", Some(serde_json::json!([{ "terminationMethod": "done" }]))), | ||
("frank().catch(go)", Some(serde_json::json!([{ "terminationMethod": "done" }]))), | ||
("frank().catch(go).someOtherMethod()", None), | ||
("frank()['catch'](go).someOtherMethod()", None), | ||
]; | ||
|
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Tester::new(CatchOrReturn::NAME, pass, fail).test_and_snapshot(); | ||
} |
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