how to use go vet. go vet is run by using the specification method go tool vet [directory] . After executing, areas with problems will be indicated in the output. After that, just make the necessary edits to the source code according to the identified points.

Use the go test -run flag to run a specific test. The flag is documented in the testing flags section of the go tool documentation: -run regexp Run only those tests and examples matching the regular expression.

Running benchmarks You must pass a valid regex to -bench , just passing -bench is a syntax error. You can use this property to run a subset of benchmarks. go test -run=XXX -bench=. The second line is the average run time of the function under test for the final value of b.N iterations.

Yes, tests are executed as goroutines and, thus, executed concurrently.

The testing package provides support for automated testing of the Golang code. To run any test function use “go test” command, which automates the execution of any function of the form TestXxx(*testing. T), where Xxx must not start with any lowercase letter.

1. Step 1 — Creating a Sample Program to Unit Test.
2. Step 2 — Writing Unit Tests in Go.
3. Step 3 — Testing Your Go Code Using the go test command.
4. Step 4 — Writing Table-Driven Tests in Go.
5. Step 5 — Writing Coverage Tests in Go.
6. Step 6 — Writing Benchmarks in Go.
7. Step 7 — Documenting Your Go Code with Examples.

To write a new test suite, create a file whose name ends _test.go that contains the TestXxx functions as described here. Put the file in the same package as the one being tested. The file will be excluded from regular package builds but will be included when the “go test” command is run.

Basically benchmark test suite of the testing package gives the benchmark reports likes time consumed, number of iteration/request(i.e. execution of function) of the tested function. Syntax: func BenchmarkXxx(*testing.B) All of the benchmark function is executed by go test command.

Since version 1.7 the Go testing package provides the ability to run some of the tests in parallel (well not entirely in parallel but that is another blog post 😉). This is optional functionality you can enable by adding a single line of code t. Parallel() in your subtests.

A system is said to be concurrent if it can support two or more actions in progress at the same time. A system is said to be parallel if it can support two or more actions executing simultaneously. The key concept and difference between these definitions is the phrase “in progress.”

In Go language, defer statements delay the execution of the function or method or an anonymous method until the nearby functions returns. In other words, defer function or method call arguments evaluate instantly, but they don’t execute until the nearby functions returns.

Writing test cases for your code gives you the confidence that any change to the code you made for the upcoming release will not break the existing functionality. You can run your code with different possible inputs and ensure you are getting the expected results. In this article, we will be covering: About Golang Testing Package

This command is an enhanced version of go test -cover . It renders a HTML page that visualises line-by-line coverage of each affected .go file. The first half ( go test -coverprofile=cover.out ) runs go test -cover under the hood and saves the output to the file cover.out .

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Output of go test ./… If you are using VSCode, the Go extension has the ability to generate the same output as above. You can do so by searching for “go coverage” in the Command Palette. This command is an enhanced version of go test -cover . It renders a HTML page that visualises line-by-line coverage of each affected .go file.