pre-installations and preparations

node_modules/resolve/test/node_path/x/aaa/index.js

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+module.exports = 'A';

node_modules/resolve/test/node_path/x/ccc/index.js

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+module.exports = 'C';

node_modules/resolve/test/node_path/y/bbb/index.js

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+module.exports = 'B';

node_modules/resolve/test/node_path/y/ccc/index.js

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+module.exports = 'CY';