75 lines
1.6 KiB
V
75 lines
1.6 KiB
V
// This file tests whether V can generate a convenience default .str() method
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// for a custom struct, when the developer has not defined one himself.
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// The .str() methods are used for string interpolation and for println() calls.
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struct Man {
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name string
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age int
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interests []string
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}
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fn test_default_struct_string_interpolation() {
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superman := Man{'Superman', 30, ['flying', 'fighting evil', 'being nice']}
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s := '$superman'
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assert s.starts_with('Man{')
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assert s.contains("name: 'Superman'")
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assert s.contains('age: 30')
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assert s.contains('interests: [')
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assert s.contains("'being nice'")
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assert s.ends_with('}')
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// println(s)
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}
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struct Context {
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pub mut:
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vb [8]f64
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}
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fn test_fixed_array_struct_string_interpolation() {
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mut ctx := Context{}
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x := 2.32
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ctx.vb = [1.1, x, 3.3, 4.4, 5.0, 6.0, 7.0, 8.9]!
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s := '$ctx'
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assert s.starts_with('Context{')
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assert s.contains('vb: [1.1, 2.32, 3.3, 4.4, 5, 6, 7, 8.9]')
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assert s.ends_with('}')
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}
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struct Info {
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name string
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dict map[string]int
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}
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fn test_struct_map_field_string_interpolation() {
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info := Info{
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name: 'test'
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dict: {
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'a': int(1)
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'b': 2
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}
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}
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s := '$info'
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assert s.starts_with('Info{')
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assert s.contains("name: 'test'")
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assert s.contains("dict: {'a': 1, 'b': 2}")
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assert s.ends_with('}')
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}
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struct Circular {
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mut:
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next &Circular
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}
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fn test_stack_circular_elem_auto_str() {
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mut elem := Circular{0}
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elem.next = &elem
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s := '$elem'.replace('\n', '|')
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assert s == 'Circular{| next: &<circular>|}'
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}
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fn test_heap_circular_elem_auto_str() {
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mut elem := &Circular{0}
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elem.next = elem
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s := '$elem'.replace('\n', '|')
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assert s == '&Circular{| next: &<circular>|}'
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}
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