istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/test/framework/components/echo/caller.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package echo
    16  
    17  import (
    18  	"istio.io/istio/pkg/test"
    19  	"istio.io/istio/pkg/test/echo"
    20  )
    21  
    22  // CallResult the result of a call operation.
    23  type CallResult struct {
    24  	From      Caller
    25  	Opts      CallOptions
    26  	Responses echo.Responses
    27  }
    28  
    29  type Caller interface {
    30  	// Call from this Instance to a target Instance.
    31  	Call(options CallOptions) (CallResult, error)
    32  	CallOrFail(t test.Failer, options CallOptions) CallResult
    33  }
    34  
    35  type Callers []Caller
    36  
    37  // Instances returns an Instances if all callers are Instance, otherwise returns nil.
    38  func (c Callers) Instances() Instances {
    39  	var out Instances
    40  	for _, caller := range c {
    41  		c, ok := caller.(Instance)
    42  		if !ok {
    43  			return nil
    44  		}
    45  		out = append(out, c)
    46  	}
    47  	return out
    48  }