48 lines
638 B
Go
48 lines
638 B
Go
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// This test verifies that the concrete type is provided only once, even if an
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// interface additionally depends on it.
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package main
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import (
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"fmt"
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"sync"
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)
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func main() {
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injectFooBar()
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fmt.Println(provideBarCalls)
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}
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type Fooer interface {
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Foo() string
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}
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type Bar string
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type FooBar struct {
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Fooer Fooer
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Bar *Bar
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}
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func (b *Bar) Foo() string {
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return string(*b)
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}
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func provideBar() *Bar {
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mu.Lock()
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provideBarCalls++
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mu.Unlock()
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b := new(Bar)
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*b = "Hello, World!"
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return b
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}
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var (
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mu sync.Mutex
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provideBarCalls int
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)
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func provideFooBar(fooer Fooer, bar *Bar) FooBar {
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return FooBar{fooer, bar}
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}
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