asserting

Golang unit test utility.

Example

mypackage.go

package mypackage

func SomeOddNumber() int {
    return 1333
}

func PanicWith100() {
    panic(100)
}

func Div(a, b int) int {
    if b == 0 {
        panic("can' div by 0")
    }
    return a / b
}

mypackage_test.go

package mypackage

import (
    "strconv"
    "testing"

    . "github.com/mkch/asserting"
)

func TestAdd(t1 *testing.T) {
    t := TB{t1}
    // Asserts 1+1 == 2
    t.Assert(1+1, Equals(2))
    // Asserts 1+1 != 0 with custom failure message.
    t.Assert(1+1, NotEquals(0).SetMessage("1+1 != 0"))
}

func TestSomeOddNumber(t1 *testing.T) {
    t := TB{t1}
    // Asserts SomeOddNumber() returns an odd number.
    t.Assert(SomeOddNumber(), Matches(
        func(v interface{}) bool {
            return v.(int)%2 != 0
        }).
        SetMessage("Not an odd number"))
}

func TestPanicWith100(t1 *testing.T) {
    t := TB{t1}
    // Asserts calling a function must panic with 100.
    t.Assert(PanicWith100, Panics(100))
    // Asserts calling a function must panic with a string.
    t.Assert(func() { Div(1, 0) },
        PanicMatches(
            func(v interface{}) bool {
                _, ok := v.(string)
                return ok
            }))
}

func TestAtoi(t1 *testing.T) {
    t := TB{t1}
    // Test strconv.Atoi who returns an int and an error.
    // If the error value of Atoi is not nil, or the int
    // value is not 1, the assertion fails.
    t.Assert(ValueError(strconv.Atoi("1")), Equals(1))
}