fix: false negatives for no-dom-import with several imports

Use the new refactored utils function to get a list of all testing-library imports
and make sure that none of them are a dom import.

Ref: testing-library#586

Author: sjarva

docs/rules/no-dom-import.md

@@ -31,6 +31,11 @@ import { fireEvent } from 'dom-testing-library';
 import { fireEvent } from '@testing-library/dom';
 ```
 
+```js
+import { render } from '@testing-library/react'; // Okay, no error
+import { screen } from '@testing-library/dom'; // Error, unnecessary import from @testing-library/dom
+```
+
 ```js
 const { fireEvent } = require('dom-testing-library');
 ```

lib/rules/no-dom-import.ts

@@ -1,7 +1,7 @@
 import { TSESTree } from '@typescript-eslint/utils';
 
 import { createTestingLibraryRule } from '../create-testing-library-rule';
-import { isCallExpression } from '../node-utils';
+import { isCallExpression, getImportModuleName } from '../node-utils';
 
 export const RULE_NAME = 'no-dom-import';
 export type MessageIds = 'noDomImport' | 'noDomImportFramework';
@@ -84,22 +84,22 @@ export default createTestingLibraryRule<Options, MessageIds>({
 
 		return {
 			'Program:exit'() {
-				const importName = helpers.getTestingLibraryImportName();
-				const importNode = helpers.getTestingLibraryImportNode();
+				let importName: string | undefined;
+				const allImportNodes = helpers.getAllTestingLibraryImportNodes();
 
-				if (!importNode) {
-					return;
-				}
+				allImportNodes.forEach((importNode) => {
+					importName = getImportModuleName(importNode);
 
-				const domModuleName = DOM_TESTING_LIBRARY_MODULES.find(
-					(module) => module === importName
-				);
+					const domModuleName = DOM_TESTING_LIBRARY_MODULES.find(
+						(module) => module === importName
+					);
 
-				if (!domModuleName) {
-					return;
-				}
+					if (!domModuleName) {
+						return;
+					}
 
-				report(importNode, domModuleName);
+					report(importNode, domModuleName);
+				});
 			},
 		};
 	},

tests/lib/rules/no-dom-import.test.ts

@@ -203,5 +203,17 @@ ruleTester.run(RULE_NAME, rule, {
 			code: 'require("@testing-library/dom")',
 			errors: [{ messageId: 'noDomImport' }],
 		},
+		{
+			code: `
+			require("@testing-library/dom");
+			require("@testing-library/react");`,
+			errors: [{ line: 2, messageId: 'noDomImport' }],
+		},
+		{
+			code: `
+			import { render } from '@testing-library/react';
+			import { screen } from '@testing-library/dom';`,
+			errors: [{ line: 3, messageId: 'noDomImport' }],
+		},
 	],
 });