v/vlib/compiler/tests/string_interpolation_struct_test.v

// This file tests whether V can generate a convenience default .str() method
// for a custom struct, when the developer has not defined one himself.
// The .str() methods are used for string interpolation and for println() calls.

struct Man {
	name string
	age int
	interests []string
}

fn test_default_struct_string_interpolation(){
	superman := Man{'Superman', 30, ['flying','fighting evil','being nice']}
	s := '$superman'
	assert s.contains('Man {')
	assert s.contains('name: Superman')
	assert s.contains('age: 30')
	assert s.contains('interests: [')
	assert s.contains('"being nice"')
	assert s.contains('}')
	//println(s)
}