std::unique_ptr<GradientFunction> gradient_function(
      new PassThroughGradientFunction);
  tape.RecordOperation(inputs, {exp_output}, gradient_function.release());
  TF_RETURN_IF_ERROR(tape.ComputeGradient(ctx,
                                          /*targets*/ {exp_output},
                                          /*sources=*/inputs,
                                          /*output_gradients=*/{},

        assertEquals(exp, transformer.getHostOnFile(url));

        url = "example:";
        exp = "unknown";
        assertEquals(exp, transformer.getHostOnFile(url));

        url = "file:";
        exp = "localhost";
        assertEquals(exp, transformer.getHostOnFile(url));

        url = "file://";
        exp = "localhost";
        assertEquals(exp, transformer.getHostOnFile(url));

	if err != nil {
		t.Errorf("Unexpected error during diff: %v", err)
	}

	expected := []string{"Clusters Match", "Listeners Match", "Routes Match"}
	for _, exp := range expected {
		if !bytes.Contains(outputBuffer.Bytes(), []byte(exp)) {
			t.Errorf("Expected %s, but it was not found", exp)
		}
	}
}

// TestComparatorMismatchedConfigs tests the scenario where Istiod and Envoy configurations do not match

		sort.Slice(got, byResourceUID{got}.Less)
		// printEntries(exp)
		// printEntries(got)
		for i, e := range exp {
			if !e.Timestamp.Equal(got[i].Timestamp) {
				return i, false
			}
			// Skip checking elapsed since it's time sensitive.
			// if e.Elapsed != got[i].Elapsed {
			// 	return false
			// }
			if e.Resource != got[i].Resource {
				return i, false
			}

	switch exp := expI.(type) {
	case string:
		expAt, err = strconv.ParseInt(exp, 10, 64)
	case float64:
		expAt, err = int64(exp), nil
	case int64:
		expAt, err = exp, nil
	case int:
		expAt, err = int64(exp), nil
	case uint64:
		expAt, err = int64(exp), nil
	case uint:
		expAt, err = int64(exp), nil
	case json.Number:
		expAt, err = exp.Int64()
	case time.Duration:

}

// UnmarshalXML decodes delete marker boolean from the XML form.
func (b *Boolean) UnmarshalXML(d *xml.Decoder, startElement xml.StartElement) error {
	var exp bool
	err := d.DecodeElement(&exp, &startElement)
	if err != nil {
		return err
	}
	b.val = exp
	b.set = true
	return nil
}

// MarshalXML encodes expiration field into an XML form.

				h.add(sz)
			}
			got := h.toMap()
			exp := test.want
			// what is in exp is in got
			for k := range exp {
				if exp[k] != got[k] {
					t.Fatalf("interval %s: Expected %d values but got %d values\n", k, exp[k], got[k])
				}
			}
			// what is absent in exp is absent in got too
			for k := range got {
				if _, ok := exp[k]; !ok && got[k] > 0 {

	// Set table alias
	stmt.tableAlias = selectAST.From.As
	// Remove quotes from column aliases
	if selectAST.Expression != nil {
		for _, exp := range selectAST.Expression.Expressions {
			if strings.HasSuffix(exp.As, "'") && strings.HasPrefix(exp.As, "'") && len(exp.As) >= 2 {
				exp.As = exp.As[1 : len(exp.As)-1]
			}
		}
	}
	return
}

func validateTableName(from *TableExpression) error {

			oiCache := newObjInfoCache()
			for _, exp := range toExpire {
				if exp.ExpireAll {
					toExpireAll = append(toExpireAll, exp.ObjectInfo)
					continue
				}
				// Cache ObjectInfo value via pointers for
				// subsequent use to track objects which
				// couldn't be deleted.
				od := ObjectToDelete{
					ObjectV: ObjectV{
						ObjectName: exp.Name,
						VersionID:  exp.VersionID,
					},
				}

  explicit ExpGradientFunction(AbstractTensorHandle* exp) : exp_(exp) {
    exp->Ref();
  }
  Status Compute(AbstractContext* ctx,
                 absl::Span<AbstractTensorHandle* const> grad_outputs,
                 absl::Span<AbstractTensorHandle*> grad_inputs) override {
    AbstractTensorHandle* conj_output;
    std::string name = "Conj_Exp_Grad";
    TF_RETURN_IF_ERROR(SafeConj(ctx, exp_.get(), &conj_output, name.c_str()));