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feat(vxrn): add tests for dependency patching
This commit introduces tests for the dependency patching feature in `packages/vxrn/src/utils/patches.ts`. The tests cover the following scenarios: - Applying multiple patch rules to the same file. - Merging `extraPatches` in `applyBuiltInPatches`. - Calling `applyDependencyPatches` multiple times with different inputs. For each test case, the following is verified: - Correct creation and content of the `.ogfile`. - Skipping of already patched files. - Re-application of patches based on the `.ogfile` when `VXRN_FORCE_PATCH` is set. The `patches.ts` file has been modified for better testability, allowing customization of `node_modules` path and built-in patches. A new script `test:deps-patching` has been added to `packages/vxrn/package.json` to run these tests.
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‎packages/vxrn/package.json‎

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@@ -54,7 +54,8 @@
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"watch": "yarn build --watch",
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"check": "yarn depcheck",
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"clean": "tamagui-build clean",
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"clean:build": "tamagui-build clean:build"
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"clean:build": "tamagui-build clean:build",
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"test:deps-patching": "./run-tests.sh"
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},
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"dependencies": {
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"@expo/config-plugins": "^8.0.8",

‎packages/vxrn/run-tests.sh‎

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#!/bin/bash
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# Get the directory where the script is located
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SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
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# Navigate to the utils directory where test-runner.js is located
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cd "$SCRIPT_DIR/src/utils" || exit 1
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# Execute the test runner using Node.js
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node test-runner.js

‎packages/vxrn/src/utils/patches.ts‎

Lines changed: 10 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -115,22 +115,26 @@ const getIsAlreadyPatched = (fullFilePath: string) => {
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_isAlreadyPatchedMap.set(fullFilePath, isAlreadyPatched)
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return isAlreadyPatched
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}
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const _isAlreadyPatchedMap = new Map<string, boolean>()
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export const _isAlreadyPatchedMap = new Map<string, boolean>()
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120120
/**
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* A set of full paths to files that have been patched during the
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* current run.
123123
*/
124-
const pathsBeingPatched = new Set<string>()
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export const pathsBeingPatched = new Set<string>()
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// --- HACK! ---
126126

127127
export async function applyDependencyPatches(
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patches: DepPatch[],
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{ root = process.cwd() }: { root?: string } = {}
129+
{ root = process.cwd(), nodeModulesPath }: { root?: string; nodeModulesPath?: string | string[] } = {}
130130
) {
131-
const nodeModulesDirs = findNodeModules({
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cwd: root,
133-
}).map((relativePath) => join(root, relativePath))
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const nodeModulesDirs = nodeModulesPath
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? Array.isArray(nodeModulesPath)
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? nodeModulesPath
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: [nodeModulesPath]
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: findNodeModules({
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cwd: root,
137+
}).map((relativePath) => join(root, relativePath))
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135139
await Promise.all(
136140
patches.flatMap((patch) => {

‎packages/vxrn/src/utils/test-fixtures/mock-node_modules/patching-test/testfile.js‎

Lines changed: 1 addition & 0 deletions
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‎packages/vxrn/src/utils/test-runner.js‎

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const FSExtra = require('fs-extra');
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const { join, resolve } = require('node:path');
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const {
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applyDependencyPatches,
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applyBuiltInPatches,
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_isAlreadyPatchedMap,
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pathsBeingPatched,
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// @ts-ignore
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} = require('./patches'); // Adjust path as necessary, assuming patches.ts is compiled to patches.js
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const MOCK_NODE_MODULES_PATH = resolve(__dirname, 'test-fixtures', 'mock-node_modules');
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const TEST_MODULE_PATH = join(MOCK_NODE_MODULES_PATH, 'patching-test');
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const TEST_FILE_PATH = join(TEST_MODULE_PATH, 'testfile.js');
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const OG_TEST_FILE_PATH = TEST_FILE_PATH + '.vxrn.ogfile';
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// --- Helper Functions ---
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async function setupTestEnvironment() {
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// Reset global state
20+
_isAlreadyPatchedMap.clear();
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pathsBeingPatched.clear();
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// Ensure mock-node_modules and patching-test directory exist
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await FSExtra.ensureDir(TEST_MODULE_PATH);
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// Recreate testfile.js
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await FSExtra.writeFile(TEST_FILE_PATH, '// orig');
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// Delete ogfile if it exists
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if (await FSExtra.exists(OG_TEST_FILE_PATH)) {
31+
await FSExtra.remove(OG_TEST_FILE_PATH);
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}
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// Unset VXRN_FORCE_PATCH
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delete process.env.VXRN_FORCE_PATCH;
36+
}
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async function readFileContent(filePath) {
39+
if (await FSExtra.exists(filePath)) {
40+
return FSExtra.readFile(filePath, 'utf-8');
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}
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return null;
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}
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function setForcePatchEnv(value) {
46+
if (value) {
47+
process.env.VXRN_FORCE_PATCH = 'true';
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} else {
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delete process.env.VXRN_FORCE_PATCH;
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}
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}
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async function runAssertions(testName, expectedContent, expectedOgContent, expectedPatchedMapSize, expectedPathsBeingPatchedSize) {
54+
const fileContent = await readFileContent(TEST_FILE_PATH);
55+
const ogFileContent = await readFileContent(OG_TEST_FILE_PATH);
56+
57+
if (fileContent !== expectedContent) {
58+
console.error(`[${testName}] TestFile Content FAIL: Expected "${expectedContent}", got "${fileContent}"`);
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} else {
60+
console.log(`[${testName}] TestFile Content PASS`);
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}
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63+
if (ogFileContent !== expectedOgContent) {
64+
console.error(`[${testName}] OgFile Content FAIL: Expected "${expectedOgContent}", got "${ogFileContent}"`);
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} else {
66+
console.log(`[${testName}] OgFile Content PASS`);
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}
68+
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if (_isAlreadyPatchedMap.size !== expectedPatchedMapSize) {
70+
console.error(`[${testName}] _isAlreadyPatchedMap Size FAIL: Expected ${expectedPatchedMapSize}, got ${_isAlreadyPatchedMap.size}`);
71+
} else {
72+
console.log(`[${testName}] _isAlreadyPatchedMap Size PASS`);
73+
}
74+
75+
if (pathsBeingPatched.size !== expectedPathsBeingPatchedSize) {
76+
console.error(`[${testName}] pathsBeingPatched Size FAIL: Expected ${expectedPathsBeingPatchedSize}, got ${pathsBeingPatched.size}`);
77+
} else {
78+
console.log(`[${testName}] pathsBeingPatched Size PASS`);
79+
}
80+
}
81+
82+
// --- Test Cases ---
83+
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async function testScenario1_TwoRulesSameFile() {
85+
const testName = 'Scenario 1: Two patching rules for the same file';
86+
console.log(`\n--- Running ${testName} ---`);
87+
await setupTestEnvironment();
88+
89+
const patches = [
90+
{
91+
module: 'patching-test',
92+
patchFiles: {
93+
'testfile.js': (contents) => contents + '\n// patch 1',
94+
},
95+
},
96+
{
97+
module: 'patching-test',
98+
patchFiles: {
99+
'testfile.js': (contents) => contents + '\n// patch 2',
100+
},
101+
},
102+
];
103+
104+
console.log('Applying patches first time...');
105+
await applyDependencyPatches(patches, { nodeModulesPath: MOCK_NODE_MODULES_PATH });
106+
await runAssertions(testName + " - First Run", '// orig\n// patch 1\n// patch 2', '// orig', 1, 1);
107+
108+
console.log('Applying patches second time (should skip)...');
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const mapSizeBefore = _isAlreadyPatchedMap.size;
110+
const setSizeBefore = pathsBeingPatched.size;
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pathsBeingPatched.clear(); // clear for this run as it's per-run
112+
await applyDependencyPatches(patches, { nodeModulesPath: MOCK_NODE_MODULES_PATH });
113+
await runAssertions(testName + " - Second Run (Skipped)", '// orig\n// patch 1\n// patch 2', '// orig', mapSizeBefore, setSizeBefore -1); // pathsBeingPatched should remain 0 as nothing new is patched
114+
115+
console.log('Applying patches with VXRN_FORCE_PATCH...');
116+
setForcePatchEnv(true);
117+
pathsBeingPatched.clear(); // clear for this run
118+
_isAlreadyPatchedMap.clear(); // clear this to simulate fresh check
119+
await applyDependencyPatches(patches, { nodeModulesPath: MOCK_NODE_MODULES_PATH });
120+
await runAssertions(testName + " - Force Patch", '// orig\n// patch 1\n// patch 2', '// orig', 1, 1);
121+
setForcePatchEnv(false);
122+
123+
console.log(`--- ${testName} Complete ---`);
124+
}
125+
126+
async function testScenario2_MergeExtraPatches() {
127+
const testName = 'Scenario 2: Merging extraPatches';
128+
console.log(`\n--- Running ${testName} ---`);
129+
await setupTestEnvironment();
130+
131+
const builtInPatches = [
132+
{
133+
module: 'patching-test',
134+
patchFiles: {
135+
'testfile.js': '// built-in patch',
136+
'version': '1.0.0', // ensure version check is handled if present
137+
},
138+
},
139+
];
140+
141+
const extraPatches = {
142+
'patching-test': {
143+
'testfile.js': '// extra patch', // This should overwrite the built-in one
144+
'anotherfile.js': '// new file patch by extra', // This should be added
145+
optimize: 'exclude',
146+
},
147+
};
148+
149+
const options = { root: process.cwd(), तम: {} }; // Mock options as needed by applyBuiltInPatches
150+
151+
console.log('Applying built-in and extra patches...');
152+
// @ts-ignore
153+
await applyBuiltInPatches(options, extraPatches, builtInPatches);
154+
// Note: applyBuiltInPatches internally calls applyDependencyPatches.
155+
// We need to assert the final state of testfile.js
156+
// And potentially anotherfile.js if we were to create it. For now, focus on testfile.js
157+
// The current applyBuiltInPatches structure merges patchFiles objects.
158+
// If a file key is the same, the extraPatch one should win.
159+
await runAssertions(testName + " - First Run", '// extra patch', '// orig', 1, 1);
160+
161+
162+
console.log('Applying patches second time (should skip)...');
163+
const mapSizeBefore = _isAlreadyPatchedMap.size;
164+
pathsBeingPatched.clear();
165+
// @ts-ignore
166+
await applyBuiltInPatches(options, extraPatches, builtInPatches);
167+
await runAssertions(testName + " - Second Run (Skipped)", '// extra patch', '// orig', mapSizeBefore, 0);
168+
169+
170+
console.log('Applying patches with VXRN_FORCE_PATCH...');
171+
setForcePatchEnv(true);
172+
pathsBeingPatched.clear();
173+
_isAlreadyPatchedMap.clear();
174+
// @ts-ignore
175+
await applyBuiltInPatches(options, extraPatches, builtInPatches);
176+
await runAssertions(testName + " - Force Patch", '// extra patch', '// orig', 1, 1);
177+
setForcePatchEnv(false);
178+
179+
console.log(`--- ${testName} Complete ---`);
180+
}
181+
182+
183+
async function testScenario3_MultipleApplyDependencyPatches() {
184+
const testName = 'Scenario 3: Calling applyDependencyPatches multiple times with different inputs';
185+
console.log(`\n--- Running ${testName} ---`);
186+
await setupTestEnvironment();
187+
188+
const patches1 = [
189+
{
190+
module: 'patching-test',
191+
patchFiles: { 'testfile.js': (contents) => contents + '\n// first apply' },
192+
},
193+
];
194+
const patches2 = [
195+
{
196+
module: 'patching-test',
197+
patchFiles: { 'testfile.js': (contents) => contents + '\n// second apply (should be from og)' },
198+
},
199+
];
200+
201+
console.log('Applying patches1 first time...');
202+
await applyDependencyPatches(patches1, { nodeModulesPath: MOCK_NODE_MODULES_PATH });
203+
await runAssertions(testName + " - Patches1 First Run", '// orig\n// first apply', '// orig', 1, 1);
204+
205+
// Reset pathsBeingPatched for the next distinct call, but _isAlreadyPatchedMap should persist for `testfile.js`
206+
pathsBeingPatched.clear();
207+
// _isAlreadyPatchedMap.clear(); // DO NOT CLEAR THIS, to simulate separate calls where previous patching is known
208+
209+
console.log('Applying patches2 (should apply to original because testfile.js is already considered patched by patches1 run, then force patch will use OG)');
210+
// This scenario is tricky. If applyDependencyPatches is called with *different* patch rules for the *same file*
211+
// that was already patched in a *previous* call (even in the same overall script run),
212+
// the current logic will skip it because `getIsAlreadyPatched(fullPath)` will be true.
213+
// The `ogfile` will be from the *first* patch application.
214+
// If we want the second set of patches to apply to the *original*, we need VXRN_FORCE_PATCH.
215+
216+
await applyDependencyPatches(patches2, { nodeModulesPath: MOCK_NODE_MODULES_PATH });
217+
// It will skip because testfile.js is already patched by patches1
218+
await runAssertions(testName + " - Patches2 Second Run (Skipped due to prior patch)", '// orig\n// first apply', '// orig', 1, 0);
219+
220+
221+
console.log('Applying patches2 with VXRN_FORCE_PATCH (should apply to original)...');
222+
setForcePatchEnv(true);
223+
pathsBeingPatched.clear();
224+
// _isAlreadyPatchedMap.clear(); // Clear to ensure it re-evaluates, or keep to test if force overrides existing map entry
225+
// Let's keep _isAlreadyPatchedMap to see if VXRN_FORCE_PATCH bypasses its check, it should.
226+
// The key is that it should read from OG file.
227+
await applyDependencyPatches(patches2, { nodeModulesPath: MOCK_NODE_MODULES_PATH });
228+
// Since patches2 is a function (contents) => contents + ..., and it reads from ogfile.
229+
await runAssertions(testName + " - Patches2 Force Patch", '// orig\n// second apply (should be from og)', '// orig', 1, 1);
230+
setForcePatchEnv(false);
231+
232+
console.log(`--- ${testName} Complete ---`);
233+
}
234+
235+
236+
async function main() {
237+
await testScenario1_TwoRulesSameFile();
238+
await testScenario2_MergeExtraPatches();
239+
await testScenario3_MultipleApplyDependencyPatches();
240+
console.log("\nAll tests complete. Check console output for PASS/FAIL.");
241+
}
242+
243+
main().catch(console.error);

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