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Remove unneeded checks #638

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merged 4 commits into from Aug 2, 2020
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3 changes: 1 addition & 2 deletions src/rules/prefer-to-have-length.ts
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
) {
Expand Down
4 changes: 1 addition & 3 deletions src/rules/require-to-throw-message.ts
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))
Expand Down
7 changes: 3 additions & 4 deletions src/rules/utils.ts
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];
};

Expand Down
11 changes: 3 additions & 8 deletions src/rules/valid-expect.ts
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 @@ -249,20 +249,15 @@ export default createRule<

const parentNode = matcher.node.parent;

if (
!modifier ||
!parentNode ||
!parentNode.parent ||
modifier.name === ModifierName.not
) {
if (!modifier || modifier.name === ModifierName.not) {
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return;
}
/**
* If parent node is an array expression, we'll report the warning,
* for the array object, not for each individual assertion.
*/
const isParentArrayExpression =
parentNode.parent.type === AST_NODE_TYPES.ArrayExpression;
parentNode.parent?.type === AST_NODE_TYPES.ArrayExpression;
const orReturned = alwaysAwait ? '' : ' or returned';
/**
* An async assertion can be chained with `then` or `catch` statements.
Expand Down