test: provide a separate cache for each test (#654)

Partially addresses #643 

### Checklist:
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- [x] I agree to follow this project's [**Code of
Conduct**](https://github.com/10up/.github/blob/trunk/CODE_OF_CONDUCT.md).
- [ ] I have updated the documentation accordingly.
- [x] I have added tests to cover my change.
- [x] All new and existing tests pass.

packages/core/src/data/strategies/SinglePostFetchStrategy.ts

@@ -249,7 +249,7 @@ export class SinglePostFetchStrategy<
 
 			if (!post) {
 				throw new NotFoundError(
-					`Post was found but did not match current path: "${this.path}""`,
+					`Post #${result[0].id} - "${result[0].link}" was found but did not match current path: "${this.path}""`,
 				);
 			}
 

packages/core/src/data/strategies/__tests__/PostOrPostsFetchStrategy.ts

@@ -183,7 +183,7 @@ describe('PostOrPostsFetchStrategy', () => {
 		);
 
 		await expect(() => fetchStrategy.fetcher('', params)).rejects.toThrow(
-			'Neither single or archive returned data: The request to /wp-json/wp/v2/posts?_embed=true&categories=distinctio-rerum-ratione-maxime-repudiandae-laboriosam-quam returned no data, Post was found but did not match current path: "/uncategorized/distinctio-rerum-ratione-maxime-repudiandae-laboriosam-quam"',
+			'Neither single or archive returned data: The request to /wp-json/wp/v2/posts?_embed=true&categories=distinctio-rerum-ratione-maxime-repudiandae-laboriosam-quam returned no data, Post #54 - "https://js1.10up.com/2020/05/07/distinctio-rerum-ratione-maxime-repudiandae-laboriosam-quam/" was found but did not match current path: "/uncategorized/distinctio-rerum-ratione-maxime-repudiandae-laboriosam-quam"',
 		);
 
 		// now make it work by faking full path

packages/core/src/react/hooks/__tests__/useFetchPost.tsx

@@ -1,6 +1,7 @@
 import { renderHook, waitFor } from '@testing-library/react';
 import * as React from 'react';
 import { expectTypeOf } from 'expect-type';
+import { SWRConfig } from 'swr';
 import { DRAFT_POST_ID, VALID_AUTH_TOKEN } from '../../../../test/server';
 import { PostEntity, PostParams } from '../../../data';
 import { SettingsProvider } from '../../provider';
@@ -10,7 +11,11 @@ import { mockUseFetchErrorResponse } from '../mocks';
 
 describe('useFetchPost', () => {
 	const wrapper = ({ children }) => {
-		return <SettingsProvider settings={{ sourceUrl: '' }}>{children}</SettingsProvider>;
+		return (
+			<SWRConfig value={{ provider: () => new Map() }}>
+				<SettingsProvider settings={{ sourceUrl: '' }}>{children}</SettingsProvider>
+			</SWRConfig>
+		);
 	};
 
 	it('throws errors if accessing data before fetch', async () => {
@@ -185,7 +190,15 @@ describe('useFetchPost', () => {
 
 	it('reads param from the url and sets isMainQuery flag', async () => {
 		const { result } = renderHook(
-			() => useFetchPost({}, {}, '/modi-qui-dignissimos-sed-assumenda-sint-iusto'),
+			() =>
+				useFetchPost(
+					{
+						fullPath:
+							'https://js1.10up.com/2020/05/07/modi-qui-dignissimos-sed-assumenda-sint-iusto/',
+					},
+					{},
+					'/modi-qui-dignissimos-sed-assumenda-sint-iusto/',
+				),
 			{
 				wrapper,
 			},
@@ -200,7 +213,7 @@ describe('useFetchPost', () => {
 		});
 
 		const { result: secondResult } = renderHook(
-			() => useFetchPost({ slug: 'modi-qui-dignissimos-sed-assumenda-sint-iusto' }),
+			() => useFetchPost({ slug: 'modi-qui-dignissimos-sed-assumenda-sint-iusto' }, {}),
 			{
 				wrapper,
 			},

packages/core/src/react/hooks/__tests__/useFetchPostOrPosts.tsx

@@ -1,5 +1,6 @@
 import * as React from 'react';
 import { renderHook, waitFor } from '@testing-library/react';
+import { SWRConfig } from 'swr';
 import { SettingsProvider } from '../../provider';
 import { setHeadstartWPConfig } from '../../../utils';
 import { useFetchPostOrPosts } from '../useFetchPostOrPosts';
@@ -11,6 +12,14 @@ import { mockUseFetchErrorResponse } from '../mocks';
 
 describe('useFetchPostOrPosts', () => {
 	const wrapper = ({ children }) => {
+		return (
+			<SWRConfig value={{ provider: () => new Map() }}>
+				<SettingsProvider settings={{ sourceUrl: '' }}>{children}</SettingsProvider>
+			</SWRConfig>
+		);
+	};
+
+	const wrapperWithCache = ({ children }) => {
 		return <SettingsProvider settings={{ sourceUrl: '' }}>{children}</SettingsProvider>;
 	};
 
@@ -120,7 +129,7 @@ describe('useFetchPostOrPosts', () => {
 					'/distinctio-rerum-ratione-maxime-repudiandae-laboriosam-quam',
 				),
 			{
-				wrapper,
+				wrapper: wrapperWithCache,
 			},
 		);
 
@@ -138,7 +147,7 @@ describe('useFetchPostOrPosts', () => {
 					'/distinctio-rerum-ratione-maxime-repudiandae-laboriosam-quam',
 				),
 			{
-				wrapper,
+				wrapper: wrapperWithCache,
 			},
 		);
 
@@ -161,7 +170,7 @@ describe('useFetchPostOrPosts', () => {
 		};
 
 		const { result } = renderHook(() => useFetchPostOrPosts(p, undefined, '/uncategorized'), {
-			wrapper,
+			wrapper: wrapperWithCache,
 		});
 
 		await waitFor(() => {
@@ -171,7 +180,7 @@ describe('useFetchPostOrPosts', () => {
 		const { result: result2 } = renderHook(
 			() => useFetchPosts(p.archive, undefined, '/uncategorized'),
 			{
-				wrapper,
+				wrapper: wrapperWithCache,
 			},
 		);
 

packages/core/src/react/hooks/__tests__/useFetchPosts.tsx

@@ -2,6 +2,7 @@ import { renderHook, waitFor } from '@testing-library/react';
 import { expectTypeOf } from 'expect-type';
 import * as React from 'react';
 
+import { SWRConfig } from 'swr';
 import { PostEntity, PostsArchiveParams } from '../../../data';
 import { SettingsProvider } from '../../provider';
 import { useFetchPosts } from '../useFetchPosts';
@@ -11,7 +12,11 @@ import { mockUseFetchErrorResponse } from '../mocks';
 
 describe('useFetchPosts', () => {
 	const wrapper = ({ children }) => {
-		return <SettingsProvider settings={{ sourceUrl: '' }}>{children}</SettingsProvider>;
+		return (
+			<SWRConfig value={{ provider: () => new Map() }}>
+				<SettingsProvider settings={{ sourceUrl: '' }}>{children}</SettingsProvider>
+			</SWRConfig>
+		);
 	};
 
 	beforeEach(() => {
@@ -338,7 +343,7 @@ describe('useFetchPosts', () => {
 			() =>
 				useFetchPosts(
 					{
-						randomArgument: 10, // bypass swr cache
+						// randomArgument: 10, // bypass swr cache
 						category: 'uncategorized',
 						per_page: 1,
 					},

packages/core/src/react/hooks/__tests__/useFetchSearch.tsx

@@ -2,6 +2,7 @@ import { renderHook, waitFor } from '@testing-library/react';
 import { expectTypeOf } from 'expect-type';
 import * as React from 'react';
 
+import { SWRConfig } from 'swr';
 import { PostEntity, PostsArchiveParams } from '../../../data';
 import { SettingsProvider } from '../../provider';
 import { useFetchSearch } from '../useFetchSearch';
@@ -11,7 +12,11 @@ import { mockUseFetchErrorResponse } from '../mocks';
 
 describe('useFetchSearch', () => {
 	const wrapper = ({ children }) => {
-		return <SettingsProvider settings={{ sourceUrl: '' }}>{children}</SettingsProvider>;
+		return (
+			<SWRConfig value={{ provider: () => new Map() }}>
+				<SettingsProvider settings={{ sourceUrl: '' }}>{children}</SettingsProvider>
+			</SWRConfig>
+		);
 	};
 
 	setHeadlessConfig({