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feat(go): runtime type check type unions (#3712)
Runtime type-checking can be disabled by adding `--tag=no_runtime_type_checking` to go compiler invocations. This can be used to avoid paying the performance toll of runtime type checking (which should be modest in most cases), or to work around a bug in the type checking code.
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91 changes: 91 additions & 0 deletions
91
packages/@jsii/go-runtime-test/project/runtime_type_checking_test.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package tests | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "testing" | ||
|
|
||
| "github.com/aws/jsii-runtime-go" | ||
| "github.com/aws/jsii/jsii-calc/go/jsiicalc/v3" | ||
| "github.com/aws/jsii/jsii-calc/go/jsiicalc/v3/anonymous" | ||
| ) | ||
|
|
||
| func TestConstructor(t *testing.T) { | ||
| defer expectPanic(t, "parameter unionProperty[0][\"bad\"] must be one of the allowed types: *StructA, *StructB; received \"Not a StructA or StructB\" (a string)") | ||
| jsiicalc.NewClassWithCollectionOfUnions(&[]*map[string]interface{}{ | ||
| { | ||
| "good": jsiicalc.StructA{ | ||
| RequiredString: jsii.String("present"), | ||
| }, | ||
| "bad": "Not a StructA or StructB", | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| func TestSetter(t *testing.T) { | ||
| subject := jsiicalc.NewClassWithCollectionOfUnions(&[]*map[string]interface{}{}) | ||
|
|
||
| defer expectPanic(t, "parameter val[0][\"bad\"] must be one of the allowed types: *StructA, *StructB; received \"Not a StructA or StructB\" (a string)") | ||
| subject.SetUnionProperty(&[]*map[string]interface{}{ | ||
| { | ||
| "good": jsiicalc.StructA{ | ||
| RequiredString: jsii.String("present"), | ||
| }, | ||
| "bad": "Not a StructA or StructB", | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| func TestStaticMethod(t *testing.T) { | ||
| defer expectPanic(t, "parameter struct_ must be one of the allowed types: *StructA, *StructB; received \"Not a StructA\" (a string)") | ||
| jsiicalc.StructUnionConsumer_IsStructA("Not a StructA") | ||
| } | ||
|
|
||
| func TestAnonymousObjectIsValid(t *testing.T) { | ||
| strct := jsiicalc.StructUnionConsumer_ProvideStruct(jsii.String("A")) | ||
| if !*jsiicalc.StructUnionConsumer_IsStructA(strct) { | ||
| t.Error("Expected strct to be a StructA") | ||
| } | ||
|
|
||
| iface := anonymous.UseOptions_Provide(jsii.String("A")) | ||
| if *anonymous.UseOptions_Consume(iface) != "A" { | ||
| t.Error("Expected iface to produce A") | ||
| } | ||
| } | ||
|
|
||
| func TestNestedUnion(t *testing.T) { | ||
| func() { | ||
| defer expectPanic(t, "parameter unionProperty[0] must be one of the allowed types: *map[string]interface{}, *[]interface{}; received 1337.42 (a float64)") | ||
| jsiicalc.NewClassWithNestedUnion(&[]interface{}{1337.42}) | ||
| }() | ||
|
|
||
| func() { | ||
| defer expectPanic(t, "parameter unionProperty[0][1] must be one of the allowed types: *StructA, *StructB; received 1337.42 (a float64)") | ||
| jsiicalc.NewClassWithNestedUnion(&[]interface{}{ | ||
| []interface{}{ | ||
| jsiicalc.StructA{RequiredString: jsii.String("present")}, | ||
| 1337.42, | ||
| }, | ||
| }) | ||
| }() | ||
|
|
||
| func() { | ||
| defer expectPanic(t, "parameter unionProperty[0][\"bad\"] must be one of the allowed types: *StructA, *StructB; received \"Not a StructA or StructB\" (a string)") | ||
| jsiicalc.NewClassWithNestedUnion(&[]interface{}{ | ||
| map[string]interface{}{ | ||
| "good": jsiicalc.StructA{RequiredString: jsii.String("present")}, | ||
| "bad": "Not a StructA or StructB", | ||
| }, | ||
| }) | ||
| }() | ||
| } | ||
|
|
||
| func expectPanic(t *testing.T, expected string) { | ||
| if err := recover(); err != nil { | ||
| actual := fmt.Sprintf("%v", err) | ||
| if actual != expected { | ||
| t.Errorf("Failed with error:\n%#v\nexpected to receive:\n%#v", actual, expected) | ||
| } | ||
| } else { | ||
| t.Errorf("Expected test to fail with error:\n%#v", expected) | ||
| } | ||
| } |
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