callset_test.go

Documentation: github.com/golang/mock/gomock

     1  // Copyright 2011 Google Inc.
     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 gomock
    16  
    17  import (
    18  	"reflect"
    19  	"testing"
    20  )
    21  
    22  type receiverType struct{}
    23  
    24  func (receiverType) Func() {}
    25  
    26  func TestCallSetAdd(t *testing.T) {
    27  	method := "TestMethod"
    28  	var receiver interface{} = "TestReceiver"
    29  	cs := newCallSet()
    30  
    31  	numCalls := 10
    32  	for i := 0; i < numCalls; i++ {
    33  		cs.Add(newCall(t, receiver, method, reflect.TypeOf(receiverType{}.Func)))
    34  	}
    35  
    36  	call, err := cs.FindMatch(receiver, method, []interface{}{})
    37  	if err != nil {
    38  		t.Fatalf("FindMatch: %v", err)
    39  	}
    40  	if call == nil {
    41  		t.Fatalf("FindMatch: Got nil, want non-nil *Call")
    42  	}
    43  }
    44  
    45  func TestCallSetRemove(t *testing.T) {
    46  	method := "TestMethod"
    47  	var receiver interface{} = "TestReceiver"
    48  
    49  	cs := newCallSet()
    50  	ourCalls := []*Call{}
    51  
    52  	numCalls := 10
    53  	for i := 0; i < numCalls; i++ {
    54  		// NOTE: abuse the `numCalls` value to convey initial ordering of mocked calls
    55  		generatedCall := &Call{receiver: receiver, method: method, numCalls: i}
    56  		cs.Add(generatedCall)
    57  		ourCalls = append(ourCalls, generatedCall)
    58  	}
    59  
    60  	// validateOrder validates that the calls in the array are ordered as they were added
    61  	validateOrder := func(calls []*Call) {
    62  		// lastNum tracks the last `numCalls` (call order) value seen
    63  		lastNum := -1
    64  		for _, c := range calls {
    65  			if lastNum >= c.numCalls {
    66  				t.Errorf("found call %d after call %d", c.numCalls, lastNum)
    67  			}
    68  			lastNum = c.numCalls
    69  		}
    70  	}
    71  
    72  	for _, c := range ourCalls {
    73  		validateOrder(cs.expected[callSetKey{receiver, method}])
    74  		cs.Remove(c)
    75  	}
    76  }
    77  
    78  func TestCallSetFindMatch(t *testing.T) {
    79  	t.Run("call is exhausted", func(t *testing.T) {
    80  		cs := callSet{}
    81  		var receiver interface{} = "TestReceiver"
    82  		method := "TestMethod"
    83  		args := []interface{}{}
    84  
    85  		c1 := newCall(t, receiver, method, reflect.TypeOf(receiverType{}.Func))
    86  		cs.exhausted = map[callSetKey][]*Call{
    87  			{receiver: receiver, fname: method}: {c1},
    88  		}
    89  
    90  		_, err := cs.FindMatch(receiver, method, args)
    91  		if err == nil {
    92  			t.Fatal("expected error, but was nil")
    93  		}
    94  
    95  		if err.Error() == "" {
    96  			t.Fatal("expected error to have message, but was empty")
    97  		}
    98  	})
    99  }
   100
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