How deeply does Go in Practice, Second Edition cover testing package?

Demonstrates test-file naming, Test functions, failure output, package commands, and coverage, but not advanced test organization.

Testing package

As explained in Go in Practice, Second Edition

The Go testing package is a standard-library package for defining and running automated tests and reporting test failures.

The Go testing package supports automated tests, failure reporting, command-line execution, code coverage, and race-condition detection. Test files end in _test.go, so Go runs them during testing but excludes them from application builds. section 1.2.4

A practical testing workflow:

Define a function whose name begins with Test and accept a *testing.T value for reporting failures. section 1.2.4
Run go test for the current package or go test ./... for the package tree. section 1.2.4

Detecting a Unicode reversal bug

A test reverses names and compares actual and expected values with strings.EqualFold. The failure exposes byte-wise reversal of a multibyte character; converting the string to []rune fixes the implementation, after which go test reports PASS.

How Go in Practice, Second Edition covers it

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Learn Go with Pocket-Sized ProjectsThe Go testing package provides support for automated tests, benchmarks, and related test execution features.

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Related concepts

go testused by · go test is the Go command that builds and runs tests for specified packages and can also execute benchmarks and report coverage.
testing.T.Runused by · testing.T.Run is a Go testing method that creates and executes a named subtest and reports its result to the parent test.
Terratestused by · Terratest is a Go library for testing infrastructure code and infrastructure deployments.
example testuses · An example test is a Go test function whose output both documents API behavior and serves as an executable check.
standard librarypart of · A standard library is a collection of reusable modules, types, functions, APIs, and other facilities distributed with a programming language implementation or platform.

This explainer was generated by Manning's knowledge graph from the text of Go in Practice, Second Edition. The section links point to the parts of the book it draws on.