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0f20c4cdab
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0f20c4cdab | |||
1b82f2cd83 | |||
6ba70ed046 |
@ -3,6 +3,7 @@ package testutil
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import "fmt"
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import "slices"
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import "strings"
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import "reflect"
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// Snake lets you compare blocks of data where the ordering of certain parts may
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// be swapped every which way. It is designed for comparing the encoding of
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@ -92,3 +93,69 @@ func HexBytes(data []byte) string {
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}
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return out.String()
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}
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// Describe returns a string representing the type and data of the given value.
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func Describe(value any) string {
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desc := describer { }
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desc.describe(reflect.ValueOf(value))
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return desc.String()
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}
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type describer struct {
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strings.Builder
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indent int
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}
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func (this *describer) describe(value reflect.Value) {
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value = reflect.ValueOf(value.Interface())
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switch value.Kind() {
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case reflect.Array, reflect.Slice:
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this.printf("[\n")
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this.indent += 1
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for index := 0; index < value.Len(); index ++ {
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this.iprintf("")
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this.describe(value.Index(index))
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this.iprintf("\n")
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}
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this.indent -= 1
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this.iprintf("]")
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case reflect.Struct:
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this.printf("struct {\n")
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this.indent += 1
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typ := value.Type()
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for index := range typ.NumField() {
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indexBuffer := [1]int { index }
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this.iprintf("%s: ", typ.Field(index).Name)
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this.describe(value.FieldByIndex(indexBuffer[:]))
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this.iprintf("\n")
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}
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this.indent -= 1
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this.iprintf("}\n")
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case reflect.Map:
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this.printf("map {\n")
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this.indent += 1
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iter := value.MapRange()
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for iter.Next() {
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this.iprintf("")
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this.describe(iter.Key())
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this.printf(": ")
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this.describe(iter.Value())
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this.iprintf("\n")
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}
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this.indent -= 1
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this.iprintf("}\n")
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case reflect.Pointer:
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this.printf("& ")
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this.describe(value.Elem())
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default:
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this.printf("<%v %v>", value.Type(), value.Interface())
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}
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}
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func (this *describer) printf(format string, v ...any) {
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fmt.Fprintf(this, format, v...)
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}
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func (this *describer) iprintf(format string, v ...any) {
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fmt.Fprintf(this, strings.Repeat("\t", this.indent) + format, v...)
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}
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@ -58,8 +58,8 @@ func TestEncodeAnyTable(test *testing.T) {
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func TestEncodeDecodeAnyTable(test *testing.T) {
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err := testEncodeDecodeAny(test, map[uint16] any {
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0xF3B9: 1,
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0x0102: 2,
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0xF3B9: uint32(1),
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0x0102: uint32(2),
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0x0000: []byte("hi!"),
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0xFFFF: []uint16 { 0xBEE5, 0x7777 },
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0x1234: [][]uint16 { []uint16 { 0x5 }, []uint16 { 0x17, 0xAAAA} },
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@ -183,8 +183,8 @@ func testEncodeDecodeAny(test *testing.T, value, correctValue any) error {
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_, decoded, n, err := decAny(bytes)
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if err != nil { return err }
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test.Log("got: ", decoded)
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test.Log("correct:", correctValue)
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test.Log("got: ", tu.Describe(decoded))
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test.Log("correct:", tu.Describe(correctValue))
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if !reflect.DeepEqual(decoded, correctValue) {
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return fmt.Errorf("values not equal")
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}
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