chore: remove unused errors in catchs, and reject parameters

e2e/__tests__/snapshot.test.ts

@@ -59,7 +59,7 @@ const initialTestData = fs.readFileSync(snapshotEscapeTestFile, 'utf8');
 const fileExists = (filePath: string) => {
   try {
     return fs.statSync(filePath).isFile();
-  } catch (e) {}
+  } catch {}
   return false;
 };
 const getSnapshotOfCopy = () => {

packages/expect/src/__tests__/matchers-toEqual.property.test.ts

@@ -29,7 +29,7 @@ describe('toEqual', () => {
       try {
         expect(a).toEqual(b);
         return true;
-      } catch (err) {
+      } catch {
         return false;
       }
     };

packages/expect/src/__tests__/matchers-toStrictEqual.property.test.ts

@@ -20,15 +20,15 @@ describe('toStrictEqual', () => {
     try {
       expect(a).toStrictEqual(b);
       return true;
-    } catch (err) {
+    } catch {
       return false;
     }
   };
   const safeAssertDeepStrictEqual = (a, b) => {
     try {
       assert.deepStrictEqual(a, b);
       return true;
-    } catch (err) {
+    } catch {
       return false;
     }
   };

packages/expect/src/__tests__/spyMatchers.test.ts

@@ -453,7 +453,7 @@ const createSpy = (fn: jest.Mock) => {
 
       try {
         fn(true);
-      } catch (error) {
+      } catch {
         // ignore error
       }
 
@@ -479,13 +479,13 @@ const createSpy = (fn: jest.Mock) => {
 
       try {
         fn();
-      } catch (error) {
+      } catch {
         // ignore error
       }
 
       try {
         fn();
-      } catch (error) {
+      } catch {
         // ignore error
       }
 
@@ -501,7 +501,7 @@ const createSpy = (fn: jest.Mock) => {
 
       try {
         fn();
-      } catch (error) {
+      } catch {
         // ignore error
       }
 
@@ -652,7 +652,7 @@ const createSpy = (fn: jest.Mock) => {
 
       try {
         fn(true);
-      } catch (error) {
+      } catch {
         // ignore error
       }
 
@@ -679,7 +679,7 @@ const createSpy = (fn: jest.Mock) => {
 
       try {
         fn(true);
-      } catch (error) {
+      } catch {
         // ignore error
       }
 
@@ -886,7 +886,7 @@ const createSpy = (fn: jest.Mock) => {
 
       try {
         fn();
-      } catch (error) {
+      } catch {
         // ignore error
       }
 
@@ -908,7 +908,7 @@ const createSpy = (fn: jest.Mock) => {
 
       try {
         fn();
-      } catch (error) {
+      } catch {
         // ignore error
       }
 

packages/expect/src/index.ts

@@ -338,7 +338,7 @@ const makeThrowingMatcher = (
 
         return asyncResult
           .then(aResult => processResult(aResult, asyncError))
-          .catch(error => handleError(error));
+          .catch(handleError);
       } else {
         const syncResult = potentialResult as SyncExpectationResult;
 

packages/jest-changed-files/src/git.ts

@@ -94,7 +94,7 @@ const adapter: SCMAdapter = {
       const result = await execa('git', options, {cwd});
 
       return path.resolve(cwd, result.stdout);
-    } catch (e) {
+    } catch {
       return null;
     }
   },

packages/jest-changed-files/src/hg.ts

@@ -51,7 +51,7 @@ const adapter: SCMAdapter = {
       const result = await execa('hg', ['root'], {cwd, env});
 
       return result.stdout;
-    } catch (e) {
+    } catch {
       return null;
     }
   },

packages/jest-cli/src/cli/index.ts

@@ -97,7 +97,7 @@ const getProjectListFromCLIArgs = (
   if (!projects.length && process.platform === 'win32') {
     try {
       projects.push(tryRealpath(process.cwd()));
-    } catch (err) {
+    } catch {
       // do nothing, just catch error
       // process.binding('fs').realpath can throw, e.g. on mapped drives
     }

packages/jest-cli/src/init/index.ts

@@ -53,7 +53,7 @@ export default async (
     projectPackageJson = JSON.parse(
       fs.readFileSync(projectPackageJsonPath, 'utf-8'),
     );
-  } catch (error) {
+  } catch {
     throw new MalformedPackageJsonError(projectPackageJsonPath);
   }
 

packages/jest-config/src/__mocks__/read-pkg.js

@@ -20,7 +20,7 @@ function readPkg(file) {
   try {
     const json = JSON.parse(mockFile);
     return Promise.resolve(json);
-  } catch (err) {
+  } catch {
     return Promise.reject(`${file} is not valid JSON.`);
   }
 }

packages/jest-config/src/index.ts

@@ -64,7 +64,7 @@ export async function readConfig(
     let config;
     try {
       config = JSON.parse(argv.config);
-    } catch (e) {
+    } catch {
       throw new Error(
         'There was an error while parsing the `--config` argument as a JSON string.',
       );

packages/jest-config/src/normalize.ts

@@ -138,7 +138,7 @@ const setupPreset = (
       if (presetModule) {
         delete require.cache[require.resolve(presetModule)];
       }
-    } catch (e) {}
+    } catch {}
 
     // @ts-expect-error: `presetModule` can be null?
     preset = require(presetModule);
@@ -278,7 +278,7 @@ const normalizeCollectCoverageFrom = (
   if (!Array.isArray(initialCollectCoverageFrom)) {
     try {
       value = JSON.parse(initialCollectCoverageFrom);
-    } catch (e) {}
+    } catch {}
 
     if (options[key] && !Array.isArray(value)) {
       value = [initialCollectCoverageFrom];
@@ -391,7 +391,7 @@ const normalizeRootDir = (
   try {
     // try to resolve windows short paths, ignoring errors (permission errors, mostly)
     options.rootDir = tryRealpath(options.rootDir);
-  } catch (e) {
+  } catch {
     // ignored
   }
 
@@ -956,7 +956,7 @@ export default function normalize(
   try {
     // try to resolve windows short paths, ignoring errors (permission errors, mostly)
     newOptions.cwd = tryRealpath(process.cwd());
-  } catch (e) {
+  } catch {
     // ignored
   }
 

packages/jest-config/src/utils.ts

@@ -144,7 +144,7 @@ export const resolveWithPrefix = (
 
   try {
     return require.resolve(`${prefix}${fileName}`);
-  } catch (e) {}
+  } catch {}
 
   module = Resolver.findNodeModule(fileName, {
     basedir: rootDir,
@@ -156,7 +156,7 @@ export const resolveWithPrefix = (
 
   try {
     return require.resolve(fileName);
-  } catch (e) {}
+  } catch {}
 
   throw createValidationError(
     `  ${humanOptionName} ${chalk.bold(

packages/jest-config/src/validatePattern.ts

@@ -10,7 +10,7 @@ export default function validatePattern(pattern?: string): boolean {
     try {
       // eslint-disable-next-line no-new
       new RegExp(pattern, 'i');
-    } catch (e) {
+    } catch {
       return false;
     }
   }

packages/jest-core/src/TestNamePatternPrompt.ts

@@ -40,7 +40,7 @@ export default class TestNamePatternPrompt extends PatternPrompt {
 
     try {
       regex = new RegExp(pattern, 'i');
-    } catch (e) {
+    } catch {
       return [];
     }
 

packages/jest-core/src/TestPathPatternPrompt.ts

@@ -47,7 +47,7 @@ export default class TestPathPatternPrompt extends PatternPrompt {
 
     try {
       regex = new RegExp(pattern, 'i');
-    } catch (e) {}
+    } catch {}
 
     let tests: Array<Test> = [];
     if (regex && this._searchSources) {

packages/jest-core/src/cli/index.ts

@@ -238,7 +238,7 @@ const runWatch = async (
         undefined,
         filter,
       );
-    } catch (e) {
+    } catch {
       exit(0);
     }
   }

packages/jest-diff/src/index.ts

@@ -154,7 +154,7 @@ function compareObjects(
         options,
       );
     }
-  } catch (e) {
+  } catch {
     hasThrown = true;
   }
 

packages/jest-haste-map/src/__tests__/index.test.js

@@ -1163,7 +1163,7 @@ describe('HasteMap', () => {
 
   describe('file system changes processing', () => {
     function waitForItToChange(hasteMap) {
-      return new Promise((resolve, reject) => {
+      return new Promise(resolve => {
         hasteMap.once('change', resolve);
       });
     }

packages/jest-haste-map/src/index.ts

@@ -126,7 +126,7 @@ const canUseWatchman = ((): boolean => {
   try {
     execSync('watchman --version', {stdio: ['ignore']});
     return true;
-  } catch (e) {}
+  } catch {}
   return false;
 })();
 
@@ -381,7 +381,7 @@ class HasteMap extends EventEmitter {
 
     try {
       hasteMap = serializer.readFileSync(this._cachePath);
-    } catch (err) {
+    } catch {
       hasteMap = this._createEmptyMap();
     }
 

packages/jest-haste-map/src/lib/FSEventsWatcher.ts

@@ -19,7 +19,7 @@ import walker from 'walker';
 let fsevents: typeof import('fsevents') | null = null;
 try {
   fsevents = require('fsevents');
-} catch (e) {
+} catch {
   // Optional dependency, only supported on Darwin.
 }
 

packages/jest-haste-map/src/lib/isRegExpSupported.ts

@@ -10,7 +10,7 @@ export default function isRegExpSupported(value: string): boolean {
     // eslint-disable-next-line no-new
     new RegExp(value);
     return true;
-  } catch (e) {
+  } catch {
     return false;
   }
 }

packages/jest-jasmine2/src/__tests__/pTimeout.test.ts

@@ -30,7 +30,7 @@ describe('pTimeout', () => {
     const promise = Promise.reject();
     try {
       await pTimeout(promise, 1000, clearTimeout, setTimeout, onTimeout);
-    } catch (e) {}
+    } catch {}
     expect(setTimeout).toHaveBeenCalled();
     expect(clearTimeout).toHaveBeenCalled();
     expect(onTimeout).not.toHaveBeenCalled();

packages/jest-jasmine2/src/jasmine/Suite.ts

@@ -207,7 +207,7 @@ export default class Suite {
         const child = this.children[i];
         try {
           child.addExpectationResult.apply(child, args);
-        } catch (e) {
+        } catch {
           // keep going
         }
       }

packages/jest-jasmine2/src/jasmine/spyRegistry.ts

@@ -113,7 +113,7 @@ export default class SpyRegistry {
       let descriptor;
       try {
         descriptor = Object.getOwnPropertyDescriptor(obj, methodName);
-      } catch (e) {
+      } catch {
         // IE 8 doesn't support `definePropery` on non-DOM nodes
       }
 
@@ -166,7 +166,7 @@ export default class SpyRegistry {
       let descriptor: PropertyDescriptor | undefined;
       try {
         descriptor = Object.getOwnPropertyDescriptor(obj, propertyName);
-      } catch (e) {
+      } catch {
         // IE 8 doesn't support `definePropery` on non-DOM nodes
       }
 

packages/jest-matcher-utils/src/index.ts

@@ -93,7 +93,7 @@ export const stringify = (object: unknown, maxDepth: number = 10): string => {
       min: true,
       plugins: PLUGINS,
     });
-  } catch (e) {
+  } catch {
     result = prettyFormat(object, {
       callToJSON: false,
       maxDepth,

packages/jest-message-util/src/index.ts

@@ -26,7 +26,7 @@ let nodeInternals: Array<RegExp> = [];
 
 try {
   nodeInternals = StackUtils.nodeInternals();
-} catch (e) {
+} catch {
   // `StackUtils.nodeInternals()` fails in browsers. We don't need to remove
   // node internals in the browser though, so no issue.
 }
@@ -295,7 +295,7 @@ export const formatStackTrace = (
           // see: https://github.com/facebook/jest/pull/5405#discussion_r164281696
           fileContent = fs.readFileSync(filename, 'utf8');
           renderedCallsite = getRenderedCallsite(fileContent, line, column);
-        } catch (e) {
+        } catch {
           // the file does not exist or is inaccessible, we ignore
         }
       }

packages/jest-mock/src/__tests__/index.test.ts

@@ -765,7 +765,7 @@ describe('moduleMocker', () => {
 
       try {
         fn(2, 4);
-      } catch (error) {
+      } catch {
         // ignore error
       }
 

packages/jest-reporters/src/coverage_reporter.ts

@@ -212,7 +212,7 @@ export default class CoverageReporter extends BaseReporter {
 
     try {
       await Promise.all(instrumentation);
-    } catch (err) {
+    } catch {
       // Do nothing; errors were reported earlier to the console.
     }