FIX: @W-19972333@: Suppress the warning about max listeners when running tests (#1908)

Author: stephen-carter-at-sf

package.json

@@ -114,6 +114,7 @@
 				"summary"
 			]
 		],
+		"setupFiles": ["./test/setup-jest.ts"],
 		"testEnvironment": "node",
 		"testMatch": [
 			"<rootDir>/test/**/*.test.ts"

test/setup-jest.ts

@@ -0,0 +1,8 @@
+// Note that in a single process our tests create many instances of CodeAnalyzer. For each instance of CodeAnalyzer, a
+// call to process.addListener is made to cleanup the root working folder if needed. See
+//    https://github.com/forcedotcom/code-analyzer-core/blob/dev/packages/code-analyzer-core/src/code-analyzer.ts#L121
+// Because of this we would get a lot of warnings. For example:
+//    (node:2039) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 exit listeners added to [process].
+// To suppress these warnings, it is easiest to just allow the process running these tests to allow an infinite amount
+// of listeners. So we do that here (where 0 means infinite):
+process.setMaxListeners(0);