Improve no identical title

src/rules/no-identical-title.ts

@@ -1,7 +1,6 @@
 import {
   createRule,
-  getStringValue,
-  hasExpressions,
+  getAccessorValue,
   isDescribe,
   isStringNode,
   isTemplateLiteral,
@@ -44,15 +43,15 @@ export default createRule({
         if (isDescribe(node)) {
           contexts.push(newDescribeContext());
         }
-        const [firstArgument] = node.arguments;
+        const [argument] = node.arguments;
         if (
-          !firstArgument ||
-          !isStringNode(firstArgument) ||
-          (isTemplateLiteral(firstArgument) && hasExpressions(firstArgument))
+          !argument ||
+          !isStringNode(argument) ||
+          (isTemplateLiteral(argument) && argument.expressions.length > 0)
         ) {
           return;
         }
-        const title = getStringValue(firstArgument);
+        const title = getAccessorValue(argument);
         if (isTestCase(node)) {
           if (currentLayer.testTitles.includes(title)) {
             context.report({ messageId: 'multipleTestTitle', node });

src/rules/tsUtils.ts

@@ -108,6 +108,22 @@ export const isStringNode = <V extends string>(
 export const getStringValue = <S extends string>(node: StringNode<S>): S =>
   isTemplateLiteral(node) ? node.quasis[0].value.raw : node.value;
 
+/**
+ * Gets the value of the given `AccessorNode`,
+ * account for the different node types.
+ *
+ * @param {AccessorNode<S>} accessor
+ *
+ * @return {S}
+ *
+ * @template S
+ */
+export const getAccessorValue = <S extends string = string>(
+  accessor: AccessorNode<S>,
+): S => getStringValue(accessor);
+
+type AccessorNode<Specifics extends string = string> = StringNode<Specifics>;
+
 interface JestExpectIdentifier extends TSESTree.Identifier {
   name: 'expect';
 }
@@ -138,13 +154,6 @@ interface JestExpectCallMemberExpression extends TSESTree.MemberExpression {
   property: TSESTree.Identifier;
 }
 
-// represents expect usage like "expect.anything" & "expect.hasAssertions"
-interface JestExpectNamespaceMemberExpression
-  extends TSESTree.MemberExpression {
-  object: JestExpectIdentifier;
-  property: TSESTree.Identifier;
-}
-
 /**
  * Checks if the given `node` is a {@link JestExpectCallExpression}.
  *
@@ -306,11 +315,6 @@ export const isDescribe = (
   );
 };
 
-export const hasExpressions = (
-  node: TSESTree.Node,
-): node is TSESTree.Expression =>
-  'expressions' in node && node.expressions.length > 0;
-
 const collectReferences = (scope: TSESLint.Scope.Scope) => {
   const locals = new Set();
   const unresolved = new Set();