Pfft, you know how tests for functions like this: func MonthToString(month int) string { switch month { case 1: return "January" ca

Pfft, you know how tests for functions like this: func MonthToString(month int) string { switch month { case 1: return "January" case 2: return "February" ... case 10: return "October" case 12: return "December" default: panic(fmt.Errorf("invalid month number: %d", month)) } } are usually written? You take the switch's body, shove it into the test function, and then replace "case/return" with regexp to "assert.Equal" or something: func TestMonthToString(t *testing.T) { assert.Equal(t, "January", MonthToString(1)) assert.Equal(t, "February", MonthToString(2)) ... assert.Equal(t, "October", MonthToString(10)) assert.Equal(t, "December", MonthToString(12)) assert.PanicsWithError(t, "invalid month number: 13", func() { MonthToString(13) }) } Look ma, we got that sweet 100% code coverage!