refactor(linter): move shared function from utils to rule (#6127)

I previously extracted the common parts of `prefer_to_be_truthy` and
`prefer_to_be_falsy` into `utils`. However, we should place
rule-specific logic that isn't general-purpose directly within the
respective rules.

Co-authored-by: Don Isaac <donald.isaac@gmail.com>

crates/oxc_linter/src/rules/vitest/prefer_to_be_falsy.rs

@@ -1,10 +1,8 @@
 use oxc_macros::declare_oxc_lint;
 
-use crate::{
-    context::LintContext,
-    rule::Rule,
-    utils::{collect_possible_jest_call_node, prefer_to_be_simply_bool},
-};
+use crate::{context::LintContext, rule::Rule, utils::collect_possible_jest_call_node};
+
+use super::prefer_to_be_truthy::prefer_to_be_simply_bool;
 
 #[derive(Debug, Default, Clone)]
 pub struct PreferToBeFalsy;

crates/oxc_linter/src/rules/vitest/prefer_to_be_truthy.rs

@@ -1,11 +1,75 @@
+use oxc_ast::{
+    ast::{Argument, Expression},
+    AstKind,
+};
 use oxc_macros::declare_oxc_lint;
 
 use crate::{
     context::LintContext,
     rule::Rule,
-    utils::{collect_possible_jest_call_node, prefer_to_be_simply_bool},
+    utils::{
+        collect_possible_jest_call_node, is_equality_matcher,
+        parse_expect_and_typeof_vitest_fn_call, PossibleJestNode,
+    },
 };
 
+use oxc_diagnostics::OxcDiagnostic;
+use oxc_span::Span;
+
+pub fn prefer_to_be_simply_bool<'a>(
+    possible_vitest_node: &PossibleJestNode<'a, '_>,
+    ctx: &LintContext<'a>,
+    value: bool,
+) {
+    let node = possible_vitest_node.node;
+    let AstKind::CallExpression(call_expr) = node.kind() else {
+        return;
+    };
+    let Some(vitest_expect_fn_call) =
+        parse_expect_and_typeof_vitest_fn_call(call_expr, possible_vitest_node, ctx)
+    else {
+        return;
+    };
+    let Some(matcher) = vitest_expect_fn_call.matcher() else {
+        return;
+    };
+    if !is_equality_matcher(matcher) || vitest_expect_fn_call.args.len() == 0 {
+        return;
+    }
+    let Some(arg_expr) = vitest_expect_fn_call.args.first().and_then(Argument::as_expression)
+    else {
+        return;
+    };
+
+    if let Expression::BooleanLiteral(arg) = arg_expr.get_inner_expression() {
+        if arg.value == value {
+            let span = Span::new(matcher.span.start, call_expr.span.end);
+
+            let is_cmp_mem_expr = match matcher.parent {
+                Some(Expression::ComputedMemberExpression(_)) => true,
+                Some(
+                    Expression::StaticMemberExpression(_) | Expression::PrivateFieldExpression(_),
+                ) => false,
+                _ => return,
+            };
+
+            let call_name = if value { "toBeTruthy" } else { "toBeFalsy" };
+
+            ctx.diagnostic_with_fix(
+                OxcDiagnostic::warn(format!("Use `{call_name}` instead.")).with_label(span),
+                |fixer| {
+                    let new_matcher = if is_cmp_mem_expr {
+                        format!("[\"{call_name}\"]()")
+                    } else {
+                        format!("{call_name}()")
+                    };
+                    fixer.replace(span, new_matcher)
+                },
+            );
+        }
+    }
+}
+
 #[derive(Debug, Default, Clone)]
 pub struct PreferToBeTruthy;
 

crates/oxc_linter/src/utils/vitest.rs

@@ -1,14 +1,6 @@
-use oxc_ast::{
-    ast::{Argument, CallExpression, Expression},
-    AstKind,
-};
-use oxc_diagnostics::OxcDiagnostic;
-use oxc_span::Span;
+use oxc_ast::ast::CallExpression;
 
-use super::{
-    is_equality_matcher, parse_jest_fn_call, ParsedExpectFnCall, ParsedJestFnCallNew,
-    PossibleJestNode,
-};
+use super::{parse_jest_fn_call, ParsedExpectFnCall, ParsedJestFnCallNew, PossibleJestNode};
 use crate::LintContext;
 
 mod valid_vitest_fn;
@@ -27,57 +19,3 @@ pub fn parse_expect_and_typeof_vitest_fn_call<'a>(
         ParsedJestFnCallNew::GeneralJest(_) => None,
     }
 }
-
-pub fn prefer_to_be_simply_bool<'a>(
-    possible_vitest_node: &PossibleJestNode<'a, '_>,
-    ctx: &LintContext<'a>,
-    value: bool,
-) {
-    let node = possible_vitest_node.node;
-    let AstKind::CallExpression(call_expr) = node.kind() else {
-        return;
-    };
-    let Some(vitest_expect_fn_call) =
-        parse_expect_and_typeof_vitest_fn_call(call_expr, possible_vitest_node, ctx)
-    else {
-        return;
-    };
-    let Some(matcher) = vitest_expect_fn_call.matcher() else {
-        return;
-    };
-    if !is_equality_matcher(matcher) || vitest_expect_fn_call.args.len() == 0 {
-        return;
-    }
-    let Some(arg_expr) = vitest_expect_fn_call.args.first().and_then(Argument::as_expression)
-    else {
-        return;
-    };
-
-    if let Expression::BooleanLiteral(arg) = arg_expr.get_inner_expression() {
-        if arg.value == value {
-            let span = Span::new(matcher.span.start, call_expr.span.end);
-
-            let is_cmp_mem_expr = match matcher.parent {
-                Some(Expression::ComputedMemberExpression(_)) => true,
-                Some(
-                    Expression::StaticMemberExpression(_) | Expression::PrivateFieldExpression(_),
-                ) => false,
-                _ => return,
-            };
-
-            let call_name = if value { "toBeTruthy" } else { "toBeFalsy" };
-
-            ctx.diagnostic_with_fix(
-                OxcDiagnostic::warn(format!("Use `{call_name}` instead.")).with_label(span),
-                |fixer| {
-                    let new_matcher = if is_cmp_mem_expr {
-                        format!("[\"{call_name}\"]()")
-                    } else {
-                        format!("{call_name}()")
-                    };
-                    fixer.replace(span, new_matcher)
-                },
-            );
-        }
-    }
-}