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Remove unneeded checks #638

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merged 4 commits into from Aug 2, 2020
Merged

Remove unneeded checks #638

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c3ece41
chore: simplify checks with optional chaining
G-Rath Aug 2, 2020
63984f5
chore: mark `parent` as always defined on `ExpectMember`
G-Rath Aug 2, 2020
15e00f5
chore: action todo
G-Rath Aug 2, 2020
1497b35
chore(valid-expect): use explict check instead of optional chain
G-Rath Aug 2, 2020
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3 changes: 1 addition & 2 deletions src/rules/prefer-to-have-length.ts
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Expand Up @@ -40,8 +40,7 @@ export default createRule({
if (
!matcher ||
!isParsedEqualityMatcherCall(matcher) ||
!argument ||
argument.type !== AST_NODE_TYPES.MemberExpression ||
argument?.type !== AST_NODE_TYPES.MemberExpression ||
!isSupportedAccessor(argument.property, 'length') ||
argument.property.type !== AST_NODE_TYPES.Identifier
) {
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4 changes: 1 addition & 3 deletions src/rules/require-to-throw-message.ts
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Expand Up @@ -30,9 +30,7 @@ export default createRule({
const { matcher, modifier } = parseExpectCall(node);

if (
matcher &&
matcher.arguments &&
matcher.arguments.length === 0 &&
matcher?.arguments?.length === 0 &&
['toThrow', 'toThrowError'].includes(matcher.name) &&
(!modifier ||
!(modifier.name === ModifierName.not || modifier.negation))
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7 changes: 3 additions & 4 deletions src/rules/utils.ts
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Expand Up @@ -300,11 +300,10 @@ interface ParsedExpectMember<
* Represents a `MemberExpression` that comes after an `ExpectCall`.
*/
interface ExpectMember<
PropertyName extends ExpectPropertyName = ExpectPropertyName,
Parent extends TSESTree.Node | undefined = TSESTree.Node | undefined
PropertyName extends ExpectPropertyName = ExpectPropertyName
> extends KnownMemberExpression<PropertyName> {
object: ExpectCall | ExpectMember;
parent: Parent;
parent: TSESTree.Node;
}

export const isExpectMember = <
Expand All @@ -326,7 +325,7 @@ export type ParsedEqualityMatcherCall<
Argument extends TSESTree.Expression = TSESTree.Expression,
Matcher extends EqualityMatcher = EqualityMatcher
> = Omit<ParsedExpectMatcher<Matcher>, 'arguments'> & {
// todo: probs should also type node parent as CallExpression
parent: TSESTree.CallExpression;
arguments: [Argument];
};

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5 changes: 2 additions & 3 deletions src/rules/valid-expect.ts
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Expand Up @@ -230,7 +230,7 @@ export default createRule<
return;
}

if (matcher.node.parent && isExpectMember(matcher.node.parent)) {
if (isExpectMember(matcher.node.parent)) {
context.report({
messageId: 'modifierUnknown',
data: { modifierName: matcher.name },
Expand All @@ -250,9 +250,8 @@ export default createRule<
const parentNode = matcher.node.parent;

if (
!modifier ||
!parentNode ||
!parentNode.parent ||
!modifier ||
modifier.name === ModifierName.not
) {
return;
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