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ofxgo/response_test.go

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package ofxgo_test
import (
"fmt"
"github.com/aclindsa/go/src/encoding/xml"
"github.com/aclindsa/ofxgo"
"reflect"
"testing"
)
// Attempt to find a method on the provided Value called 'Equal' which is a
// receiver for the Value, takes one argument of the same type, and returns
// one bool. equalMethodOf() returns the nil value if the method couldn't be
// found.
func equalMethodOf(v reflect.Value) reflect.Value {
if equalMethod, ok := v.Type().MethodByName("Equal"); ok {
if !equalMethod.Func.IsNil() &&
equalMethod.Type.NumIn() == 2 &&
equalMethod.Type.In(0) == v.Type() &&
equalMethod.Type.In(1) == v.Type() &&
equalMethod.Type.NumOut() == 1 &&
equalMethod.Type.Out(0).Kind() == reflect.Bool {
return v.MethodByName("Equal")
}
}
return reflect.ValueOf(nil)
}
// Attempt to return a string representation of the value appropriate for its
// type by finding a method on the provided Value called 'String' which is a
// receiver for the Value, and returns one string. stringMethodOf() returns
// fmt.Sprintf("%s", v) if it can't find a String method.
func valueToString(v reflect.Value) string {
if equalMethod, ok := v.Type().MethodByName("String"); ok {
if !equalMethod.Func.IsNil() &&
equalMethod.Type.NumIn() == 1 &&
equalMethod.Type.In(0) == v.Type() &&
equalMethod.Type.NumOut() == 1 &&
equalMethod.Type.Out(0).Kind() == reflect.String {
out := v.MethodByName("String").Call([]reflect.Value{})
return out[0].String()
}
}
return fmt.Sprintf("%s", v)
}
// Recursively check that the expected and actual Values are equal in value.
// If the two Values are equal in type and contain an appropriate Equal()
// method (see equalMethodOf()), that method is used for comparison. The
// provided testing.T is failed with a message if any inequality is found.
func checkEqual(t *testing.T, fieldName string, expected, actual reflect.Value) {
if expected.IsValid() && !actual.IsValid() {
t.Fatalf("%s: %s was unexpectedly nil\n", t.Name(), fieldName)
} else if !expected.IsValid() && actual.IsValid() {
t.Fatalf("%s: Expected %s to be nil (it wasn't)\n", t.Name(), fieldName)
} else if !expected.IsValid() && !actual.IsValid() {
return
}
if expected.Type() != actual.Type() {
t.Fatalf("%s: Expected %s type for %s, found %s\n", t.Name(), expected.Type().Name(), fieldName, actual.Type().Name())
}
equalMethod := equalMethodOf(expected)
if equalMethod.IsValid() {
in := []reflect.Value{actual}
out := equalMethod.Call(in)
if !out[0].Bool() {
t.Fatalf("%s: %s !Equal(): expected '%s', got '%s'\n", t.Name(), fieldName, valueToString(expected), valueToString(actual))
}
return
}
switch expected.Kind() {
case reflect.Array:
for i := 0; i < expected.Len(); i++ {
checkEqual(t, fmt.Sprintf("%s[%d]", fieldName, i), expected.Index(i), actual.Index(i))
}
case reflect.Slice:
if !expected.IsNil() && actual.IsNil() {
t.Fatalf("%s: %s was unexpectedly nil\n", t.Name(), fieldName)
} else if expected.IsNil() && !actual.IsNil() {
t.Fatalf("%s: Expected %s to be nil (it wasn't)\n", t.Name(), fieldName)
}
if expected.Len() != actual.Len() {
t.Fatalf("%s: Expected len(%s) to to be %d, was %d\n", t.Name(), fieldName, expected.Len(), actual.Len())
}
for i := 0; i < expected.Len(); i++ {
checkEqual(t, fmt.Sprintf("%s[%d]", fieldName, i), expected.Index(i), actual.Index(i))
}
case reflect.Interface:
if !expected.IsNil() && actual.IsNil() {
t.Fatalf("%s: %s was unexpectedly nil\n", t.Name(), fieldName)
} else if expected.IsNil() && !actual.IsNil() {
t.Fatalf("%s: Expected %s to be nil (it wasn't)\n", t.Name(), fieldName)
}
checkEqual(t, fieldName, expected.Elem(), actual.Elem())
case reflect.Ptr:
checkEqual(t, fieldName, expected.Elem(), actual.Elem())
case reflect.Struct:
structType := expected.Type()
for i, n := 0, expected.NumField(); i < n; i++ {
field := structType.Field(i)
// skip XMLName fields so we can be lazy and not fill them out in
// testing code
var xmlname xml.Name
if field.Name == "XMLName" && field.Type == reflect.TypeOf(xmlname) {
continue
}
// Construct a new field name for this field, containing the parent
// fieldName
newFieldName := fieldName
if fieldName != "" {
newFieldName = fieldName + "."
}
newFieldName = newFieldName + field.Name
checkEqual(t, newFieldName, expected.Field(i), actual.Field(i))
}
case reflect.String:
if expected.String() != actual.String() {
t.Fatalf("%s: %s expected to be '%s', found '%s'\n", t.Name(), fieldName, expected.String(), actual.String())
}
default:
t.Fatalf("%s: %s has unexpected type that didn't provide an Equal() method: %s\n", t.Name(), fieldName, expected.Type().Name())
}
}
func checkResponsesEqual(t *testing.T, expected, actual *ofxgo.Response) {
checkEqual(t, "", reflect.ValueOf(expected), reflect.ValueOf(actual))
}