How Can I Selectively Test Go Packages and Skip Specific Directories?

Testing Subsets of Packages

Go's testing framework provides flexibility when selecting which packages to test. By utilizing the go test command, users can specify individual packages or leverage shell commands to include multiple packages.

Skipping Specific Directories

To exclude subdirectories from testing, several methods are available:

1. Individual Package Invocation: Run separate go test commands for each package to be tested, excluding the directories to be skipped.
2. Pattern-Based Invocation: Use patterns with the go test command to include specific packages while excluding others. For instance, go test import/path/to/mypackage import/path/to/mypackage/other import/path/to/mypackage/net would test the three specified packages.
3. Conditional Skipping: Utilize shell commands such as go list | grep -v directoriesToSkip to generate a list of packages to be tested and exclude any directories marked for skipping.

Skipping Based on Test Conditions:

When tests may be time-consuming or unnecessary, they can be conditionally skipped using testing.Short() and t.Skip().

To conditionally skip based on the -short flag:

• Run go test -short import/path/to/mypackage/... or go test -short ./... within the mypackage directory.
• Specify custom conditions within the tests themselves to trigger skipping.

This approach allows for efficient testing by executing only those tests deemed necessary.

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