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- // A test that uses a mock.
- package user_test
-
- import (
- "testing"
-
- "github.com/golang/mock/gomock"
- "github.com/golang/mock/sample"
- "github.com/golang/mock/sample/imp1"
- mock_user "github.com/golang/mock/sample/mock_user"
- )
-
- func TestRemember(t *testing.T) {
- ctrl := gomock.NewController(t)
- defer ctrl.Finish()
-
- mockIndex := mock_user.NewMockIndex(ctrl)
- mockIndex.EXPECT().Put("a", 1) // literals work
- mockIndex.EXPECT().Put("b", gomock.Eq(2)) // matchers work too
-
- // NillableRet returns error. Not declaring it should result in a nil return.
- mockIndex.EXPECT().NillableRet()
- // Calls that returns something assignable to the return type.
- boolc := make(chan bool)
- // In this case, "chan bool" is assignable to "chan<- bool".
- mockIndex.EXPECT().ConcreteRet().Return(boolc)
- // In this case, nil is assignable to "chan<- bool".
- mockIndex.EXPECT().ConcreteRet().Return(nil)
-
- // Should be able to place expectations on variadic methods.
- mockIndex.EXPECT().Ellip("%d", 0, 1, 1, 2, 3) // direct args
- tri := []interface{}{1, 3, 6, 10, 15}
- mockIndex.EXPECT().Ellip("%d", tri...) // args from slice
- mockIndex.EXPECT().EllipOnly(gomock.Eq("arg"))
-
- user.Remember(mockIndex, []string{"a", "b"}, []interface{}{1, 2})
- // Check the ConcreteRet calls.
- if c := mockIndex.ConcreteRet(); c != boolc {
- t.Errorf("ConcreteRet: got %v, want %v", c, boolc)
- }
- if c := mockIndex.ConcreteRet(); c != nil {
- t.Errorf("ConcreteRet: got %v, want nil", c)
- }
-
- // Try one with an action.
- calledString := ""
- mockIndex.EXPECT().Put(gomock.Any(), gomock.Any()).Do(func(key string, _ interface{}) {
- calledString = key
- })
- mockIndex.EXPECT().NillableRet()
- user.Remember(mockIndex, []string{"blah"}, []interface{}{7})
- if calledString != "blah" {
- t.Fatalf(`Uh oh. %q != "blah"`, calledString)
- }
-
- // Use Do with a nil arg.
- mockIndex.EXPECT().Put("nil-key", gomock.Any()).Do(func(key string, value interface{}) {
- if value != nil {
- t.Errorf("Put did not pass through nil; got %v", value)
- }
- })
- mockIndex.EXPECT().NillableRet()
- user.Remember(mockIndex, []string{"nil-key"}, []interface{}{nil})
- }
-
- func TestVariadicFunction(t *testing.T) {
- ctrl := gomock.NewController(t)
- defer ctrl.Finish()
-
- mockIndex := mock_user.NewMockIndex(ctrl)
- mockIndex.EXPECT().Ellip("%d", 5, 6, 7, 8).Do(func(format string, nums ...int) {
- sum := 0
- for _, value := range nums {
- sum += value
- }
- if sum != 26 {
- t.Errorf("Expected 7, got %d", sum)
- }
- })
- mockIndex.EXPECT().Ellip("%d", gomock.Any()).Do(func(format string, nums ...int) {
- sum := 0
- for _, value := range nums {
- sum += value
- }
- if sum != 10 {
- t.Errorf("Expected 7, got %d", sum)
- }
- })
- mockIndex.EXPECT().Ellip("%d", gomock.Any()).Do(func(format string, nums ...int) {
- sum := 0
- for _, value := range nums {
- sum += value
- }
- if sum != 0 {
- t.Errorf("Expected 0, got %d", sum)
- }
- })
- mockIndex.EXPECT().Ellip("%d", gomock.Any()).Do(func(format string, nums ...int) {
- sum := 0
- for _, value := range nums {
- sum += value
- }
- if sum != 0 {
- t.Errorf("Expected 0, got %d", sum)
- }
- })
- mockIndex.EXPECT().Ellip("%d").Do(func(format string, nums ...int) {
- sum := 0
- for _, value := range nums {
- sum += value
- }
- if sum != 0 {
- t.Errorf("Expected 0, got %d", sum)
- }
- })
-
- mockIndex.Ellip("%d", 1, 2, 3, 4) // Match second matcher.
- mockIndex.Ellip("%d", 5, 6, 7, 8) // Match first matcher.
- mockIndex.Ellip("%d", 0)
- mockIndex.Ellip("%d")
- mockIndex.Ellip("%d")
- }
-
- func TestGrabPointer(t *testing.T) {
- ctrl := gomock.NewController(t)
- defer ctrl.Finish()
-
- mockIndex := mock_user.NewMockIndex(ctrl)
- mockIndex.EXPECT().Ptr(gomock.Any()).SetArg(0, 7) // set first argument to 7
-
- i := user.GrabPointer(mockIndex)
- if i != 7 {
- t.Errorf("Expected 7, got %d", i)
- }
- }
-
- func TestEmbeddedInterface(t *testing.T) {
- ctrl := gomock.NewController(t)
- defer ctrl.Finish()
-
- mockEmbed := mock_user.NewMockEmbed(ctrl)
- mockEmbed.EXPECT().RegularMethod()
- mockEmbed.EXPECT().EmbeddedMethod()
- mockEmbed.EXPECT().ForeignEmbeddedMethod()
-
- mockEmbed.RegularMethod()
- mockEmbed.EmbeddedMethod()
- var emb imp1.ForeignEmbedded = mockEmbed // also does interface check
- emb.ForeignEmbeddedMethod()
- }
-
- func TestExpectTrueNil(t *testing.T) {
- // Make sure that passing "nil" to EXPECT (thus as a nil interface value),
- // will correctly match a nil concrete type.
- ctrl := gomock.NewController(t)
- defer ctrl.Finish()
-
- mockIndex := mock_user.NewMockIndex(ctrl)
- mockIndex.EXPECT().Ptr(nil) // this nil is a nil interface{}
- mockIndex.Ptr(nil) // this nil is a nil *int
- }
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