bd4ce37baa
The previous type checking was off and did not do untyped type conversion. This endeavours to fix this with better type checking in its own type.
580 lines
14 KiB
Go
580 lines
14 KiB
Go
package interp_test
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import (
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"context"
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"fmt"
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"log"
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"net/http"
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"reflect"
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"strings"
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"testing"
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"time"
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"github.com/containous/yaegi/interp"
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"github.com/containous/yaegi/stdlib"
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)
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func init() { log.SetFlags(log.Lshortfile) }
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// testCase represents an interpreter test case.
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// Care must be taken when defining multiple test cases within the same interpreter
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// context, as all declarations occur in the global scope and are therefore
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// shared between multiple test cases.
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// Hint: use different variables or package names in testcases to keep them uncoupled.
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type testCase struct {
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desc, src, res, err string
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skip string // if not empty, skip this test case (used in case of known error)
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pre func() // functions to execute prior eval src, or nil
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}
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func TestEvalArithmetic(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{desc: "add_II", src: "2 + 3", res: "5"},
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{desc: "add_FI", src: "2.3 + 3", res: "5.3"},
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{desc: "add_IF", src: "2 + 3.3", res: "5.3"},
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{desc: "add_SS", src: `"foo" + "bar"`, res: "foobar"},
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{desc: "add_SI", src: `"foo" + 1`, err: "1:28: invalid operation: mismatched types string and int"},
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{desc: "sub_SS", src: `"foo" - "bar"`, err: "1:28: invalid operation: operator - not defined on string"},
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{desc: "sub_II", src: "7 - 3", res: "4"},
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{desc: "sub_FI", src: "7.2 - 3", res: "4.2"},
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{desc: "sub_IF", src: "7 - 3.2", res: "3.8"},
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{desc: "mul_II", src: "2 * 3", res: "6"},
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{desc: "mul_FI", src: "2.2 * 3", res: "6.6"},
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{desc: "mul_IF", src: "3 * 2.2", res: "6.6"},
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{desc: "quo_Z", src: "3 / 0", err: "1:28: invalid operation: division by zero"},
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{desc: "rem_FI", src: "8.2 % 4", err: "1:28: invalid operation: operator % not defined on float64"},
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{desc: "rem_Z", src: "8 % 0", err: "1:28: invalid operation: division by zero"},
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{desc: "shl_II", src: "1 << 8", res: "256"},
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{desc: "shl_IN", src: "1 << -1", err: "1:28: invalid operation: shift count type int, must be integer"},
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{desc: "shl_IF", src: "1 << 1.0", res: "2"},
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{desc: "shl_IF1", src: "1 << 1.1", err: "1:28: invalid operation: shift count type float64, must be integer"},
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{desc: "shl_IF2", src: "1.0 << 1", res: "2"},
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{desc: "shr_II", src: "1 >> 8", res: "0"},
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{desc: "shr_IN", src: "1 >> -1", err: "1:28: invalid operation: shift count type int, must be integer"},
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{desc: "shr_IF", src: "1 >> 1.0", res: "0"},
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{desc: "shr_IF1", src: "1 >> 1.1", err: "1:28: invalid operation: shift count type float64, must be integer"},
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{desc: "neg_I", src: "-2", res: "-2"},
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{desc: "pos_I", src: "+2", res: "2"},
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{desc: "bitnot_I", src: "^2", res: "-3"},
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{desc: "bitnot_F", src: "^0.2", err: "1:28: invalid operation: operator ^ not defined on float64"},
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{desc: "not_B", src: "!false", res: "true"},
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{desc: "not_I", src: "!0", err: "1:28: invalid operation: operator ! not defined on int"},
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})
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}
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func TestEvalAssign(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{src: `a := "Hello"; a += " world"`, res: "Hello world"},
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{src: `b := "Hello"; b += 1`, err: "1:42: invalid operation: mismatched types string and int"},
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{src: `c := "Hello"; c -= " world"`, err: "1:42: invalid operation: operator -= not defined on string"},
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{src: "e := 64.4; e %= 64", err: "1:39: invalid operation: operator %= not defined on float64"},
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{src: "f := int64(3.2)", err: "1:33: truncated to integer"},
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{src: "g := 1; g <<= 8", res: "256"},
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{src: "h := 1; h >>= 8", res: "0"},
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})
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}
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func TestEvalBuiltin(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{src: `a := []int{}; a = append(a, 1); a`, res: "[1]"},
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{src: `b := []int{1}; b = append(a, 2, 3); b`, res: "[1 2 3]"},
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{src: `c := []int{1}; d := []int{2, 3}; c = append(c, d...); c`, res: "[1 2 3]"},
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{src: `string(append([]byte("hello "), "world"...))`, res: "hello world"},
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{src: `e := "world"; string(append([]byte("hello "), e...))`, res: "hello world"},
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{src: `f := []byte("Hello"); copy(f, "world"); string(f)`, res: "world"},
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})
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}
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func TestEvalDecl(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{pre: func() { eval(t, i, "var i int = 2") }, src: "i", res: "2"},
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{pre: func() { eval(t, i, "var j, k int = 2, 3") }, src: "j", res: "2"},
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{pre: func() { eval(t, i, "var l, m int = 2, 3") }, src: "k", res: "3"},
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{pre: func() { eval(t, i, "func f() int {return 4}") }, src: "f()", res: "4"},
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{pre: func() { eval(t, i, `package foo; var I = 2`) }, src: "foo.I", res: "2"},
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{pre: func() { eval(t, i, `package foo; func F() int {return 5}`) }, src: "foo.F()", res: "5"},
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})
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}
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func TestEvalFunc(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{src: `(func () string {return "ok"})()`, res: "ok"},
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{src: `(func () (res string) {res = "ok"; return})()`, res: "ok"},
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{src: `(func () int {f := func() (a, b int) {a, b = 3, 4; return}; x, y := f(); return x+y})()`, res: "7"},
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{src: `(func () int {f := func() (a int, b, c int) {a, b, c = 3, 4, 5; return}; x, y, z := f(); return x+y+z})()`, res: "12"},
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{src: `(func () int {f := func() (a, b, c int) {a, b, c = 3, 4, 5; return}; x, y, z := f(); return x+y+z})()`, res: "12"},
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})
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}
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func TestEvalImport(t *testing.T) {
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i := interp.New(interp.Options{})
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i.Use(stdlib.Symbols)
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runTests(t, i, []testCase{
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{pre: func() { eval(t, i, `import "time"`) }, src: "2 * time.Second", res: "2s"},
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})
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}
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func TestEvalNil(t *testing.T) {
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i := interp.New(interp.Options{})
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i.Use(stdlib.Symbols)
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runTests(t, i, []testCase{
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{desc: "assign nil", src: "a := nil", err: "1:33: use of untyped nil"},
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{desc: "return nil", pre: func() { eval(t, i, "func getNil() error {return nil}") }, src: "getNil()", res: "<nil>"},
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{
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desc: "return func which return error",
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pre: func() {
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eval(t, i, `
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package bar
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func New() func(string) error {
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return func(v string) error {
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return nil
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}
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}
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`)
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v := eval(t, i, `bar.New()`)
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fn, ok := v.Interface().(func(string) error)
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if !ok {
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t.Fatal("conversion failed")
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}
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if res := fn("hello"); res != nil {
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t.Fatalf("got %v, want nil", res)
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}
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},
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},
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{
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desc: "return nil pointer",
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pre: func() {
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eval(t, i, `
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import "fmt"
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type Foo struct{}
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func Hello() *Foo {
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fmt.Println("Hello")
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return nil
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}
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`)
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},
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src: "Hello()",
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res: "<nil>",
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},
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{
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desc: "return nil func",
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pre: func() {
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eval(t, i, `func Bar() func() { return nil }`)
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},
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src: "Bar()",
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res: "<nil>",
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},
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})
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}
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func TestEvalStruct0(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{
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desc: "func field in struct",
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pre: func() {
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eval(t, i, `
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type Fromage struct {
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Name string
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Call func(string) string
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}
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func f() string {
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a := Fromage{}
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a.Name = "test"
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a.Call = func(s string) string { return s }
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return a.Call(a.Name)
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}
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`)
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},
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src: "f()",
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res: "test",
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},
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{
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desc: "literal func field in struct",
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pre: func() {
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eval(t, i, `
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type Fromage2 struct {
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Name string
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Call func(string) string
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}
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func f2() string {
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a := Fromage2{
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"test",
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func(s string) string { return s },
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}
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return a.Call(a.Name)
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}
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`)
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},
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src: "f2()",
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res: "test",
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},
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})
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}
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func TestEvalStruct1(t *testing.T) {
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i := interp.New(interp.Options{})
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eval(t, i, `
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type Fromage struct {
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Name string
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Call func(string) string
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}
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func f() string {
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a := Fromage{
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"test",
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func(s string) string { return s },
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}
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return a.Call(a.Name)
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}
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`)
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v := eval(t, i, `f()`)
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if v.Interface().(string) != "test" {
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t.Fatalf("got %v, want test", v)
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}
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}
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func TestEvalComposite0(t *testing.T) {
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i := interp.New(interp.Options{})
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eval(t, i, `
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type T struct {
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a, b, c, d, e, f, g, h, i, j, k, l, m, n string
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o map[string]int
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p []string
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}
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var a = T{
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o: map[string]int{"truc": 1, "machin": 2},
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p: []string{"hello", "world"},
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}
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`)
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v := eval(t, i, `a.p[1]`)
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if v.Interface().(string) != "world" {
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t.Fatalf("got %v, want word", v)
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}
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}
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func TestEvalCompositeBin0(t *testing.T) {
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i := interp.New(interp.Options{})
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i.Use(stdlib.Symbols)
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eval(t, i, `
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import (
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"fmt"
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"net/http"
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"time"
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)
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func Foo() {
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http.DefaultClient = &http.Client{Timeout: 2 * time.Second}
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}
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`)
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http.DefaultClient = &http.Client{}
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eval(t, i, `Foo()`)
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if http.DefaultClient.Timeout != 2*time.Second {
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t.Fatalf("got %v, want 2s", http.DefaultClient.Timeout)
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}
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}
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func TestEvalComparison(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{src: `"hhh" > "ggg"`, res: "true"},
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{
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desc: "mismatched types",
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src: `
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type Foo string
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type Bar string
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var a = Foo("test")
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var b = Bar("test")
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var c = a == b
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`,
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err: "7:13: invalid operation: mismatched types main.Foo and main.Bar",
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},
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})
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}
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func TestEvalCompositeArray(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{src: "a := []int{1, 2, 7: 20, 30}", res: "[1 2 0 0 0 0 0 20 30]"},
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})
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}
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func TestEvalUnary(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{src: "a := -1", res: "-1"},
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{src: "b := +1", res: "1", skip: "BUG"},
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{src: "c := !false", res: "true"},
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})
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}
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func TestEvalMethod(t *testing.T) {
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i := interp.New(interp.Options{})
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eval(t, i, `
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type Root struct {
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Name string
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}
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type One struct {
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Root
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}
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type Hi interface {
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Hello() string
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}
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func (r *Root) Hello() string { return "Hello " + r.Name }
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var r = Root{"R"}
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var o = One{r}
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var root interface{} = &Root{Name: "test1"}
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var one interface{} = &One{Root{Name: "test2"}}
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`)
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runTests(t, i, []testCase{
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{src: "r.Hello()", res: "Hello R"},
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{src: "(&r).Hello()", res: "Hello R"},
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{src: "o.Hello()", res: "Hello R"},
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{src: "(&o).Hello()", res: "Hello R"},
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{src: "root.(Hi).Hello()", res: "Hello test1"},
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{src: "one.(Hi).Hello()", res: "Hello test2"},
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})
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}
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func TestEvalChan(t *testing.T) {
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i := interp.New(interp.Options{})
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runTests(t, i, []testCase{
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{
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src: `(func () string {
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messages := make(chan string)
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go func() { messages <- "ping" }()
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msg := <-messages
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return msg
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})()`, res: "ping",
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},
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{
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src: `(func () bool {
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messages := make(chan string)
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go func() { messages <- "ping" }()
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msg, ok := <-messages
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return ok && msg == "ping"
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})()`, res: "true",
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},
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{
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src: `(func () bool {
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messages := make(chan string)
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go func() { messages <- "ping" }()
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var msg string
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var ok bool
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msg, ok = <-messages
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return ok && msg == "ping"
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})()`, res: "true",
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},
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})
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}
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func TestEvalFunctionCallWithFunctionParam(t *testing.T) {
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i := interp.New(interp.Options{})
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eval(t, i, `
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func Bar(s string, fn func(string)string) string { return fn(s) }
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`)
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v := eval(t, i, "Bar")
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bar := v.Interface().(func(string, func(string) string) string)
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got := bar("hello ", func(s string) string {
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return s + "world!"
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})
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want := "hello world!"
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if got != want {
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t.Errorf("unexpected result of function eval: got %q, want %q", got, want)
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}
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}
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func TestEvalMissingSymbol(t *testing.T) {
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defer func() {
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r := recover()
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if r != nil {
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t.Errorf("unexpected panic: %v", r)
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}
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}()
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type S2 struct{}
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type S1 struct {
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F S2
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}
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i := interp.New(interp.Options{})
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i.Use(interp.Exports{"p": map[string]reflect.Value{
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"S1": reflect.Zero(reflect.TypeOf(&S1{})),
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}})
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_, err := i.Eval(`import "p"`)
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if err != nil {
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t.Fatalf("failed to import package: %v", err)
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}
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_, err = i.Eval(`p.S1{F: p.S2{}}`)
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if err == nil {
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t.Error("unexpected nil error for expression with undefined type")
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}
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}
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func TestEvalWithContext(t *testing.T) {
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tests := []testCase{
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{
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desc: "for {}",
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src: `(func() {
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for {}
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})()`,
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},
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{
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desc: "select {}",
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src: `(func() {
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select {}
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})()`,
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},
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{
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desc: "blocked chan send",
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src: `(func() {
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c := make(chan int)
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c <- 1
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})()`,
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},
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{
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desc: "blocked chan recv",
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src: `(func() {
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c := make(chan int)
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<-c
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})()`,
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},
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{
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desc: "blocked chan recv2",
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src: `(func() {
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c := make(chan int)
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_, _ = <-c
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})()`,
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},
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{
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desc: "blocked range chan",
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src: `(func() {
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c := make(chan int)
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for range c {}
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})()`,
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},
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{
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desc: "double lock",
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src: `(func() {
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var mu sync.Mutex
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mu.Lock()
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mu.Lock()
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})()`,
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},
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}
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for _, test := range tests {
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done := make(chan struct{})
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src := test.src
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go func() {
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defer close(done)
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i := interp.New(interp.Options{})
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i.Use(stdlib.Symbols)
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_, err := i.Eval(`import "sync"`)
|
|
if err != nil {
|
|
t.Errorf(`failed to import "sync": %v`, err)
|
|
return
|
|
}
|
|
ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
|
|
defer cancel()
|
|
_, err = i.EvalWithContext(ctx, src)
|
|
switch err {
|
|
case context.DeadlineExceeded:
|
|
// Successful cancellation.
|
|
|
|
// Check we can still execute an expression.
|
|
v, err := i.EvalWithContext(context.Background(), "1+1\n")
|
|
if err != nil {
|
|
t.Errorf("failed to evaluate expression after cancellation: %v", err)
|
|
}
|
|
got := v.Interface()
|
|
if got != 2 {
|
|
t.Errorf("unexpected result of eval(1+1): got %v, want 2", got)
|
|
}
|
|
case nil:
|
|
t.Errorf("unexpected success evaluating expression %q", test.desc)
|
|
default:
|
|
t.Errorf("failed to evaluate expression %q: %v", test.desc, err)
|
|
}
|
|
}()
|
|
select {
|
|
case <-time.After(time.Second):
|
|
t.Errorf("timeout failed to terminate execution of %q", test.desc)
|
|
case <-done:
|
|
}
|
|
}
|
|
}
|
|
|
|
func runTests(t *testing.T, i *interp.Interpreter, tests []testCase) {
|
|
for _, test := range tests {
|
|
t.Run(test.desc, func(t *testing.T) {
|
|
if test.skip != "" {
|
|
t.Skip(test.skip)
|
|
}
|
|
if test.pre != nil {
|
|
test.pre()
|
|
}
|
|
if test.src != "" {
|
|
assertEval(t, i, test.src, test.err, test.res)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func eval(t *testing.T, i *interp.Interpreter, src string) reflect.Value {
|
|
t.Helper()
|
|
res, err := i.Eval(src)
|
|
if err != nil {
|
|
t.Logf("Error: %v", err)
|
|
if e, ok := err.(interp.Panic); ok {
|
|
t.Logf(string(e.Stack))
|
|
}
|
|
t.FailNow()
|
|
}
|
|
return res
|
|
}
|
|
|
|
func assertEval(t *testing.T, i *interp.Interpreter, src, expectedError, expectedRes string) {
|
|
res, err := i.Eval(src)
|
|
|
|
if expectedError != "" {
|
|
if err == nil || !strings.Contains(err.Error(), expectedError) {
|
|
t.Fatalf("got %v, want %s", err, expectedError)
|
|
}
|
|
return
|
|
}
|
|
|
|
if err != nil {
|
|
t.Logf("got an error: %v", err)
|
|
if e, ok := err.(interp.Panic); ok {
|
|
t.Logf(string(e.Stack))
|
|
}
|
|
t.FailNow()
|
|
}
|
|
|
|
if fmt.Sprintf("%v", res) != expectedRes {
|
|
t.Fatalf("got %v, want %s", res, expectedRes)
|
|
}
|
|
}
|