testify/assert is a popular function test automation tool in the Go language. By installing and importing this tool, you can use a series of assertion functions to check whether the expected value is equal to the actual value, such as Equal(t, expected, actual ) and True(t, actual). Practical examples of this tool include using assert.Equal(t, 4, double(2)) to test whether the double function works as expected. The advantage of testify/assert is that it provides a fast and efficient way to verify the correctness of a function, which is crucial in large Go projects.
Go language function test automation tool
Introduction
For large Go projects, function test automation is crucial. It is a quick and efficient way to check whether a function is working as expected. There are many tools that can help with this, and this article will look at one of the most popular: testify/assert.
Installation
go get -u github.com/stretchr/testify/assert
Use
testify/assert provides a series of assertion functions that can be used to check expected values and actual values. Here are some of the most commonly used assertion functions:
-
Equal(t, expected, actual)
: Checks whether two values are equal. -
EqualError(t, expectedError, actualError)
: Check whether error messages are equal. -
True(t, actual)
: Check whether the Boolean value is true. -
False(t, actual)
: Check whether the Boolean value is false.
Practical case
Here’s how to use testify/assert to test a simple function:
import ( "testing" "github.com/stretchr/testify/assert" ) func double(n int) int { return n * 2 } func TestDouble(t *testing.T) { assert.Equal(t, 4, double(2)) assert.Equal(t, 6, double(3)) }
To run the test, run the following command:
go test -v
The output is as follows:
=== RUN TestDouble --- PASS: TestDouble (0.01s) PASS ok github.com/example/myproject 0.022s
Conclusion
testify/assert is a powerful tool for automated Go function testing. It provides a series of assertion functions that can easily check expected values against actual values. By using testify/assert, you can quickly and efficiently ensure that your functions work as expected.
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