What is a common practice in Go for organizing tests in the same package?

Grouping tests in a separate package
Placing tests in a separate directory
Test files named with a suffix "_test"
Using the "testing" keyword before each test function

In Go, it's a common practice to organize tests in the same package by creating test files with a suffix "_test". When the Go tool runs tests, it automatically identifies and executes functions in these files that begin with "Test". Organizing tests in the same package allows for easier access to the internal elements of the package being tested.

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