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embind_test.go
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embind_test.go
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package embind_test
import (
"context"
"log"
"os"
"testing"
embind_external "github.com/jerbob92/wazero-emscripten-embind"
"github.com/jerbob92/wazero-emscripten-embind/generator/generator"
embind "github.com/jerbob92/wazero-emscripten-embind/internal"
"github.com/jerbob92/wazero-emscripten-embind/types"
"github.com/tetratelabs/wazero"
"github.com/tetratelabs/wazero/imports/emscripten"
"github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
"github.com/tetratelabs/wazero/api"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
func TestEmbind(t *testing.T) {
RegisterFailHandler(Fail)
RunSpecs(t, "Embind Suite")
}
var ctx = context.Background()
var engine embind_external.Engine
var runtime wazero.Runtime
var mod api.Module
var wasmData []byte
var _ = BeforeSuite(func() {
wasm, err := os.ReadFile("./testdata/wasm/tests.wasm")
if err != nil {
Expect(err).To(BeNil())
return
}
wasmData = wasm
runtimeConfig := wazero.NewRuntimeConfig()
runtime = wazero.NewRuntimeWithConfig(ctx, runtimeConfig)
if _, err := wasi_snapshot_preview1.Instantiate(ctx, runtime); err != nil {
Expect(err).To(BeNil())
return
}
compiledModule, err := runtime.CompileModule(ctx, wasm)
if err != nil {
log.Fatal(err)
}
builder := runtime.NewHostModuleBuilder("env")
emscriptenExporter, err := emscripten.NewFunctionExporterForModule(compiledModule)
if err != nil {
Expect(err).To(BeNil())
return
}
emscriptenExporter.ExportFunctions(builder)
engine = embind_external.CreateEngine(embind_external.NewConfig())
embindExporter := engine.NewFunctionExporterForModule(compiledModule)
err = embindExporter.ExportFunctions(builder)
if err != nil {
Expect(err).To(BeNil())
return
}
_, err = builder.Instantiate(ctx)
if err != nil {
Expect(err).To(BeNil())
return
}
moduleConfig := wazero.NewModuleConfig().
WithStartFunctions("_initialize").
WithStdout(os.Stdout).
WithStderr(os.Stderr).
WithName("")
ctx = engine.Attach(ctx)
mod, err = runtime.InstantiateModule(ctx, compiledModule, moduleConfig)
if err != nil {
Expect(err).To(BeNil())
return
}
})
var _ = AfterSuite(func() {
runtime.Close(ctx)
})
var _ = Describe("Calling embind functions", Label("library"), func() {
When("the function is being called", func() {
It("gives an error on an invalid argument count", func() {
res, err := engine.CallPublicSymbol(ctx, "bool_return_bool", 1, 2)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("function bool_return_bool called with 2 argument(s), expected 1 arg(s)"))
}
Expect(res).To(BeNil())
})
Context("the return type is bool", func() {
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "bool_return_true")
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_false")
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", false)
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", true)
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int8(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int8(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint8(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint8(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int16(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int16(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint16(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint16(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int32(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int32(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint32(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint32(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint16(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int64(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", int64(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint64(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", uint64(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", float32(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", float32(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", float64(0))
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", float64(1))
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", "")
Expect(err).To(BeNil())
Expect(res).To(BeFalse())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", "123")
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
res, err = engine.CallPublicSymbol(ctx, "bool_return_bool", struct {
}{})
Expect(err).To(BeNil())
Expect(res).To(BeTrue())
})
})
Context("the return type is void", func() {
It("has the correct return type", func() {
res, err := engine.CallPublicSymbol(ctx, "float_return_void", float32(123))
Expect(err).To(BeNil())
Expect(res).To(BeNil())
})
})
Context("the return type is float", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "float_return_float", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (float): value must be of type float32"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "float_return_float", float32(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(float32(9)))
})
})
Context("the return type is double", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "double_return_double", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (double): value must be of type float64"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "double_return_double", float64(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(float64(9)))
})
})
Context("the return type is int", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "int_return_int", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (int): value must be of type int32"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "int_return_int", int32(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(int32(9)))
})
})
Context("the return type is char", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "char_return_char", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (char): value must be of type int8, is int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "char_return_char", int8(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(int8(3)))
})
})
Context("the return type is long", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "long_return_long", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (long): value must be of type int32, is int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "long_return_long", int32(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(int32(6)))
})
})
Context("the return type is short", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "short_return_short", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (short): value must be of type int16, is int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "short_return_short", int16(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(int16(6)))
})
})
Context("the return type is unsigned char", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "uchar_return_uchar", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (unsigned char): value must be of type uint8, is int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "uchar_return_uchar", uint8(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(uint8(3)))
})
})
Context("the return type is unsigned int", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "uint_return_uint", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (unsigned int): value must be of type uint32, is int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "uint_return_uint", uint32(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(uint32(6)))
})
})
Context("the return type is unsigned long", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "ulong_return_ulong", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (unsigned long): value must be of type uint32, is int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "ulong_return_ulong", uint32(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(uint32(6)))
})
})
Context("the return type is unsigned short", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "ushort_return_ushort", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (unsigned short): value must be of type uint16, is int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "ushort_return_ushort", uint16(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(uint16(6)))
})
})
Context("the return type is long long", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "longlong_return_longlong", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (int64_t): value must be of type int64"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "longlong_return_longlong", int64(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(int64(6)))
})
})
Context("the return type is unsigned long long", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "ulonglong_return_ulonglong", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (uint64_t): value must be of type uint64"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "ulonglong_return_ulonglong", uint64(3))
Expect(err).To(BeNil())
Expect(res).To(Equal(uint64(6)))
})
})
Context("the return type is std string", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "std_string_return_std_string", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (std::string): value must be of type string"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "std_string_return_std_string", "embind")
Expect(err).To(BeNil())
Expect(res).To(Equal("Hello there embind"))
})
})
Context("the return type is std wstring", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "std_wstring_return_std_wstring", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (std::wstring): input must be a string, was int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "std_wstring_return_std_wstring", "embind")
Expect(err).To(BeNil())
Expect(res).To(Equal("Hello there embind"))
})
})
Context("the return type is std u16string", func() {
It("gives an error on an invalid input", func() {
res, err := engine.CallPublicSymbol(ctx, "std_u16string_return_std_u16string", 1)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (std::u16string): input must be a string, was int"))
}
Expect(res).To(BeNil())
})
It("has the correct return values", func() {
res, err := engine.CallPublicSymbol(ctx, "std_u16string_return_std_u16string", "embind")
Expect(err).To(BeNil())
Expect(res).To(Equal("Hello there embind"))
})
})
Context("the return type is a vector", func() {
It("has the correct return value", func() {
res, err := engine.CallPublicSymbol(ctx, "return_vector")
Expect(err).To(BeNil())
Expect(res).To(Not(BeNil()))
Expect(res).To(BeAssignableToTypeOf(&embind.ClassBase{}))
if obj, ok := res.(*embind.ClassBase); ok {
size, err := obj.CallInstanceMethod(ctx, obj, "size")
Expect(err).To(BeNil())
Expect(size).To(Equal(uint32(10)))
_, err = obj.CallInstanceMethod(ctx, obj, "resize", uint32(12), int32(1))
Expect(err).To(BeNil())
size, err = obj.CallInstanceMethod(ctx, obj, "size")
Expect(err).To(BeNil())
Expect(size).To(Equal(uint32(12)))
val, err := obj.CallInstanceMethod(ctx, obj, "get", uint32(1))
Expect(err).To(BeNil())
Expect(val).To(Equal(int32(1)))
_, err = obj.CallInstanceMethod(ctx, obj, "set", uint32(1), int32(2))
Expect(err).To(BeNil())
val, err = obj.CallInstanceMethod(ctx, obj, "get", uint32(1))
Expect(err).To(BeNil())
Expect(val).To(Equal(int32(2)))
}
})
})
Context("the return type is a map", func() {
It("has the correct return value", func() {
res, err := engine.CallPublicSymbol(ctx, "return_map")
Expect(err).To(BeNil())
Expect(res).To(Not(BeNil()))
Expect(res).To(BeAssignableToTypeOf(&embind.ClassBase{}))
if obj, ok := res.(*embind.ClassBase); ok {
size, err := obj.CallInstanceMethod(ctx, obj, "size")
Expect(err).To(BeNil())
Expect(size).To(Equal(uint32(1)))
val, err := obj.CallInstanceMethod(ctx, obj, "get", int32(10))
Expect(err).To(BeNil())
Expect(val).To(Equal("This is a string."))
val, err = obj.CallInstanceMethod(ctx, obj, "get", int32(1))
Expect(err).To(BeNil())
Expect(val).To(Equal(types.Undefined))
}
})
})
Context("the return type is a memory view", func() {
Context("of type char", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_char")
Expect(err).To(BeNil())
Expect(res).To(Equal([]int8{0, 1, 2, 3, 4, 5}))
})
})
Context("of type uchar", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_unsigned_char")
Expect(err).To(BeNil())
Expect(res).To(Equal([]uint8{0, 1, 2, 3, 4, 5}))
})
})
Context("of type int", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_int")
Expect(err).To(BeNil())
Expect(res).To(Equal([]int32{0, 1, 2, 3, 4, 5}))
})
})
Context("of type uint", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_unsigned_int")
Expect(err).To(BeNil())
Expect(res).To(Equal([]uint32{0, 1, 2, 3, 4, 5}))
})
})
Context("of type long", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_long")
Expect(err).To(BeNil())
Expect(res).To(Equal([]int32{0, 1, 2, 3, 4, 5}))
})
})
Context("of type unsigned long", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_unsigned_long")
Expect(err).To(BeNil())
Expect(res).To(Equal([]uint32{0, 1, 2, 3, 4, 5}))
})
})
Context("of type short", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_short")
Expect(err).To(BeNil())
Expect(res).To(Equal([]int16{0, 1, 2, 3, 4, 5}))
})
})
Context("of type ushort", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_unsigned_short")
Expect(err).To(BeNil())
Expect(res).To(Equal([]uint16{0, 1, 2, 3, 4, 5}))
})
})
Context("of type longlong", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_longlong")
Expect(err).To(BeNil())
Expect(res).To(Equal([]int64{0, 1, 2, 3, 4, 5}))
})
})
Context("of type unsigned longlong", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_unsigned_longlong")
Expect(err).To(BeNil())
Expect(res).To(Equal([]uint64{0, 1, 2, 3, 4, 5}))
})
})
Context("of type double", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_double")
Expect(err).To(BeNil())
Expect(res).To(Equal([]float64{0, 1, 2, 3, 4, 5}))
})
})
Context("of type float", func() {
It("has the correct values", func() {
res, err := engine.CallPublicSymbol(ctx, "get_memory_view_float")
Expect(err).To(BeNil())
Expect(res).To(Equal([]float32{0, 1, 2, 3, 4, 5}))
})
})
})
Context("when an overload table is used", func() {
It("gives an error on an unknown number of arguments", func() {
res, err := engine.CallPublicSymbol(ctx, "function_overload", 1, 2, 3)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("function 'function_overload' called with an invalid number of arguments (3) - expects one of (0, 1)"))
}
Expect(res).To(BeNil())
})
It("gives an error on a wrong argument type", func() {
res, err := engine.CallPublicSymbol(ctx, "function_overload", "test")
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("function_overload: could not get wire type of argument 0 (int): value must be of type int32, is string"))
}
Expect(res).To(BeNil())
})
It("picks the correct item from the overload table", func() {
res, err := engine.CallPublicSymbol(ctx, "function_overload")
Expect(err).To(BeNil())
Expect(res).To(Equal(int32(1)))
res, err = engine.CallPublicSymbol(ctx, "function_overload", int32(12))
Expect(err).To(BeNil())
Expect(res).To(Equal(int32(2)))
})
})
})
})
var _ = Describe("Using embind constants", Label("library"), func() {
When("the constants are being registered", func() {
It("has the correct values", func() {
var constantsMap = map[string]any{}
constants := engine.GetConstants()
for i := range constants {
constantsMap[constants[i].Name()] = constants[i].Value()
}
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_1", false))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_2", float32(2)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_3", float64(3)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_4", int32(4)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_5", "TestString"))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_6", int8(67)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_7", int64(7)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_8", uint16(8)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_9", uint32(9)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_10", uint16(10)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_11", uint8(11)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_12", uint32(12)))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_13", "TestWideString"))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_14", true))
Expect(constantsMap).To(HaveKeyWithValue("SOME_CONSTANT_15", uint64(15)))
Expect(constantsMap).To(HaveKeyWithValue("hasUnboundTypeNames", true))
Expect(constantsMap).To(HaveKeyWithValue("STRING_CONSTANT", "some string"))
Expect(constantsMap).To(HaveKey("VALUE_OBJECT_CONSTANT"))
Expect(constantsMap["VALUE_OBJECT_CONSTANT"]).To(HaveKeyWithValue("x", float32(1)))
Expect(constantsMap["VALUE_OBJECT_CONSTANT"]).To(HaveKeyWithValue("y", float32(2)))
Expect(constantsMap["VALUE_OBJECT_CONSTANT"]).To(HaveKeyWithValue("z", float32(3)))
Expect(constantsMap["VALUE_OBJECT_CONSTANT"]).To(HaveKeyWithValue("w", float32(4)))
Expect(constantsMap).To(HaveKeyWithValue("STATIC_CONST_INTEGER_VALUE_1000", int32(1000)))
Expect(constantsMap).To(HaveKeyWithValue("STATIC_CONST_INTEGER_VALUE_1", int32(1)))
Expect(constantsMap).To(HaveKeyWithValue("INT_CONSTANT", int32(10)))
Expect(constantsMap).To(HaveKeyWithValue("VALUE_ARRAY_CONSTANT", []any{float32(1), float32(2), float32(3), float32(4)}))
Expect(constantsMap).To(HaveLen(22))
})
})
})
var _ = Describe("Using embind enums", Label("library"), func() {
When("the enums are being registered", func() {
It("has the correct values", func() {
var enumsMap = map[string]map[string]any{}
enums := engine.GetEnums()
for i := range enums {
values := map[string]any{}
enumValues := enums[i].Values()
for valI := range enumValues {
values[enumValues[valI].Name()] = enumValues[valI].Value()
}
enumsMap[enums[i].Name()] = values
}
Expect(enumsMap).To(HaveKeyWithValue("OldStyle", map[string]any{
"ONE": uint32(0),
"TWO": uint32(1),
}))
Expect(enumsMap["OldStyle"]).To(HaveLen(2))
Expect(enumsMap).To(HaveKeyWithValue("NewStyle", map[string]any{
"ONE": int32(0),
"TWO": int32(1),
}))
Expect(enumsMap["NewStyle"]).To(HaveLen(2))
})
It("can be encoded and decoded", func() {
res, err := engine.CallPublicSymbol(ctx, "enum_in_enum_out", int32(0))
Expect(err).To(BeNil())
Expect(res).To(Equal(uint32(1)))
})
})
})
var _ = Describe("Using embind structs", Label("library"), func() {
When("using the structs", func() {
It("can be decoded with an array as input", func() {
res, err := engine.CallPublicSymbol(ctx, "findPersonAtLocation", []any{float32(1), float32(2)})
Expect(err).To(BeNil())
Expect(res).To(Equal(map[string]any{
"name": "123",
"age": int32(12),
"structArray": map[string]any{
"field": []any{int32(1), int32(2)},
},
}))
})
It("can be encoded with an array and struct as input", func() {
res, err := engine.CallPublicSymbol(ctx, "setPersonAtLocation", []any{float32(1), float32(2)}, map[string]any{
"name": "123",
"age": int32(12),
"structArray": map[string]any{
"field": []any{int32(1), int32(2)},
},
})
Expect(err).To(BeNil())
Expect(res).To(BeNil())
})
It("gives an error when not giving all fields as input", func() {
res, err := engine.CallPublicSymbol(ctx, "setPersonAtLocation", []any{float32(1), float32(2)}, map[string]any{
"fakefield": "123",
})
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("missing field: name"))
}
Expect(res).To(BeNil())
})
It("gives an error when an incomplete number of array elements is given", func() {
res, err := engine.CallPublicSymbol(ctx, "setPersonAtLocation", []any{float32(1), float32(2)}, map[string]any{
"name": "123",
"age": int32(12),
"structArray": map[string]any{
"field": []any{int32(1)},
},
})
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("incorrect number of tuple elements for array_int_2: expected=2, actual=1"))
}
Expect(res).To(BeNil())
})
})
})
type webkitAudioContextOscillatorFrequency struct {
Value float64 `embind_property:"value"`
}
type webkitAudioContextOscillator struct {
Typing string `embind_property:"type"`
Frequencdy *webkitAudioContextOscillatorFrequency `embind_property:"frequency"`
}
func (waco *webkitAudioContextOscillator) Connect(destination string) error {
return nil
}
func (waco *webkitAudioContextOscillator) Start(destination int32) error {
return nil
}
func (waco *webkitAudioContextOscillator) MapFunction(name string, returnType string, argTypes []string) (string, error) {
if name == "start" {
return "Start", nil
}
return "", nil
}
type webkitAudioContext struct {
Destination string `embind_arg:"0"`
}
func (was *webkitAudioContext) CreateOscillator() (*webkitAudioContextOscillator, error) {
return &webkitAudioContextOscillator{
Frequencdy: &webkitAudioContextOscillatorFrequency{},
}, nil
}
type ICreateOscillator interface {
CreateOscillator() *webkitAudioContextOscillator
}
func isSupportedByEmscriptenVersion(version []any, major, minor, tiny int32) bool {
currentMajor := version[0].(int32)
currentMinor := version[1].(int32)
currentTiny := version[2].(int32)
if currentMajor > major {
return true
}
if currentMajor == major && currentMinor > minor {
return true
}
if currentMajor == major && currentMinor == minor && currentTiny >= tiny {
return true
}
return false
}
var _ = Describe("Using embind emval", Label("library"), func() {
When("using the Go struct mapping", func() {
It("fails when no struct is mapped", func() {
_, err := engine.CallPublicSymbol(ctx, "doEmval")
Expect(err).To(Not(BeNil()))
})
It("can map the struct", func() {
c2 := &webkitAudioContext{}
err := engine.RegisterEmvalSymbol("webkitAudioContext", c2)
Expect(err).To(BeNil())
})
It("gives an error when a non pointer struct is already mapped", func() {
c2 := &webkitAudioContext{}
err := engine.RegisterEmvalSymbol("webkitAudioContext", c2)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not register symbol webkitAudioContext, already registered as type *embind_test.webkitAudioContext"))
}
})
It("can use the full struct from C++", func() {
res, err := engine.CallPublicSymbol(ctx, "doEmval")
Expect(err).To(BeNil())
Expect(res).To(Equal(`No global AudioContext, trying webkitAudioContext
Got an AudioContext
Configuring oscillator
Playing
All done!
`))
})
It("can create an array", func() {
array, err := engine.CallPublicSymbol(ctx, "emval_array")
Expect(err).To(BeNil())
Expect(array).To(Equal([]any{}))
})
It("can create an iterator on an array and loop over it (from version 3.1.47)", func() {
version, err := engine.CallPublicSymbol(ctx, "emscripten_version")
Expect(err).To(BeNil())
if !isSupportedByEmscriptenVersion(version.([]any), 3, 1, 47) {
return
}
res, err := engine.CallPublicSymbol(ctx, "emval_iterator")
Expect(err).To(BeNil())
Expect(res).To(Not(BeNil()))
Expect(res).To(BeAssignableToTypeOf(&embind.ClassBase{}))
if obj, ok := res.(*embind.ClassBase); ok {
size, err := obj.CallInstanceMethod(ctx, obj, "size")
Expect(err).To(BeNil())
Expect(size).To(Equal(uint32(3)))
val, err := obj.CallInstanceMethod(ctx, obj, "get", uint32(0))
Expect(err).To(BeNil())
Expect(val).To(Equal(int32(0)))
val, err = obj.CallInstanceMethod(ctx, obj, "get", uint32(1))
Expect(err).To(BeNil())
Expect(val).To(Equal(int32(1)))
val, err = obj.CallInstanceMethod(ctx, obj, "get", uint32(2))
Expect(err).To(BeNil())
Expect(val).To(Equal(int32(3)))
}
})
})
})
var _ = Describe("Using embind classes", Label("library"), func() {
When("Constructing a new class", func() {
It("fails when an invalid number of arguments is given", func() {
res, err := engine.CallPublicSymbol(ctx, "MyClass")
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("with invalid number of parameters (0) - expected (1 or 2) parameters instead"))
}
Expect(res).To(BeNil())
})
It("fails when an invalid argument is given", func() {
res, err := engine.CallPublicSymbol(ctx, "MyClass", float64(123))
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("could not get wire type of argument 0 (int): value must be of type int32, is float64"))
}
Expect(res).To(BeNil())
})
It("succeeds to construct with both overloads", func() {
res, err := engine.CallPublicSymbol(ctx, "MyClass", int32(123))
Expect(err).To(BeNil())
Expect(res).To(Not(BeNil()))
Expect(res).To(BeAssignableToTypeOf(&embind.ClassBase{}))
res, err = engine.CallPublicSymbol(ctx, "MyClass", int32(123), "test123")
Expect(err).To(BeNil())
Expect(res).To(Not(BeNil()))
Expect(res).To(BeAssignableToTypeOf(&embind.ClassBase{}))
})
Context("when the class has been constructed", func() {
var myClass *embind.ClassBase
BeforeEach(func() {
res, err := engine.CallPublicSymbol(ctx, "MyClass", int32(123), "test")
Expect(err).To(BeNil())
Expect(res).To(Not(BeNil()))
Expect(res).To(BeAssignableToTypeOf(&embind.ClassBase{}))
if obj, ok := res.(*embind.ClassBase); ok {
myClass = obj
}
})
AfterEach(func() {
if myClass != nil {
err := myClass.DeleteInstance(ctx, myClass)
Expect(err).To(BeNil())
}
})
Context("when calling functions", func() {
It("gives an error on an unknown function", func() {
res, err := myClass.CallInstanceMethod(ctx, myClass, "unknown", 1, 2, 3)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("MyClass.unknown() is not found"))
}
Expect(res).To(BeNil())
})
It("gives an error on a function with a wrong argument count", func() {
res, err := myClass.CallInstanceMethod(ctx, myClass, "combineY", 1, 2, 3)
Expect(err).To(Not(BeNil()))
if err != nil {
Expect(err.Error()).To(ContainSubstring("called with 3 argument(s), expected 1 arg(s)"))
}