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unary_test.go
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unary_test.go
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package estree
import (
"testing"
)
func TestUnaryExpression(t *testing.T) {
var ue UnaryExpression
if !ue.IsZero() {
t.Error("expected IsZero()")
}
ue.Operator = TypeOf
ue.Argument = ThisExpression{}
ue.Prefix = true
if ue.IsZero() {
t.Error("expected !IsZero()")
}
if ue.MinVersion() != ES5 {
t.Errorf("expected ES5, got %s", ue.MinVersion())
}
var v mockVisitor
ue.Walk(&v)
v.expect(t, ue, ue.Argument, nil, nil)
testRoundtripJSON(t, ue, new(UnaryExpression))
if errs := ue.Errors(); len(errs) != 0 {
t.Fatalf("unexpected errors: %v", errs)
}
ue.Operator = "not valid"
if !hasError(ErrWrongValue, ue.Errors()...) {
t.Error("expected ErrWrongValue for invalid UnaryOperator")
}
ue.Operator = Delete
ue.Argument = Identifier{}
if !hasError(ErrMissingNode, ue.Errors()...) {
t.Error("expected ErrMissingNode for zero Argument")
}
ue.Argument = nil
if !hasError(ErrMissingNode, ue.Errors()...) {
t.Error("expected ErrMissingNode for nil Argument")
}
}
func TestUpdateExpression(t *testing.T) {
var ue UpdateExpression
if !ue.IsZero() {
t.Error("expected IsZero()")
}
ue.Operator = Decrement
ue.Argument = Identifier{Name: "foo"}
ue.Prefix = true
if ue.IsZero() {
t.Error("expected !IsZero()")
}
if ue.MinVersion() != ES5 {
t.Errorf("expected ES5, got %s", ue.MinVersion())
}
var v mockVisitor
ue.Walk(&v)
v.expect(t, ue, ue.Argument, nil, nil)
testRoundtripJSON(t, ue, new(UpdateExpression))
if errs := ue.Errors(); len(errs) != 0 {
t.Fatalf("unexpected errors: %v", errs)
}
ue.Operator = "not valid"
if !hasError(ErrWrongValue, ue.Errors()...) {
t.Error("expected ErrWrongValue for invalid UpdateOperator")
}
ue.Operator = Increment
ue.Argument = Identifier{}
if !hasError(ErrMissingNode, ue.Errors()...) {
t.Error("expected ErrMissingNode for zero Argument")
}
ue.Argument = nil
if !hasError(ErrMissingNode, ue.Errors()...) {
t.Error("expected ErrMissingNode for nil Argument")
}
}