chore: update test to handle case when env var is set (#304)

* chore: update test to handle case when env var is set

- Fixes #303

* revert

* delete env vars in setupTests.js

* remove newline

tests/setupTests.js

@@ -8,6 +8,18 @@ switch (process.env.NOCK_ENV || ``) {
  case `record`:
  case `replay`:
  beforeEach(() => {
+ // To ensure we test the default behavior, we must remove these env vars
+ // in case the local machine already set these values.
+ delete process.env.COREPACK_DEFAULT_TO_LATEST;
+ delete process.env.COREPACK_ENABLE_NETWORK;
+ delete process.env.COREPACK_ENABLE_PROJECT_SPEC;
+ delete process.env.COREPACK_ENABLE_STRICT;
+ delete process.env.COREPACK_HOME;
+ delete process.env.COREPACK_NPM_REGISTRY;
+ delete process.env.COREPACK_NPM_TOKEN;
+ delete process.env.COREPACK_NPM_USERNAME;
+ delete process.env.FORCE_COLOR;
+
  process.env.RUN_CLI_ID = 0;
  process.env.NOCK_FILE_NAME = crypto
  .createHash(`md5`)