// Copyright 2010 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//go:generate mockgen -destination internal/mock_gomock/mock_matcher.go github.com/golang/mock/gomock Matcher

package gomock_test

import (
	"errors"
	"testing"

	"github.com/golang/mock/gomock"
	"github.com/golang/mock/gomock/internal/mock_gomock"
)

func TestMatchers(t *testing.T) {
	type e interface{}
	type testCase struct {
		matcher gomock.Matcher
		yes, no []e
	}
	tests := []testCase{
		{gomock.Any(), []e{3, nil, "foo"}, nil},
		{gomock.Eq(4), []e{4}, []e{3, "blah", nil, int64(4)}},
		{gomock.Nil(),
			[]e{nil, (error)(nil), (chan bool)(nil), (*int)(nil)},
			[]e{"", 0, make(chan bool), errors.New("err"), new(int)}},
		{gomock.Not(gomock.Eq(4)), []e{3, "blah", nil, int64(4)}, []e{4}},
	}
	for i, test := range tests {
		for _, x := range test.yes {
			if !test.matcher.Matches(x) {
				t.Errorf(`test %d: "%v %s" should be true.`, i, x, test.matcher)
			}
		}
		for _, x := range test.no {
			if test.matcher.Matches(x) {
				t.Errorf(`test %d: "%v %s" should be false.`, i, x, test.matcher)
			}
		}
	}
}

// A more thorough test of notMatcher
func TestNotMatcher(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()

	mockMatcher := mock_gomock.NewMockMatcher(ctrl)
	notMatcher := gomock.Not(mockMatcher)

	mockMatcher.EXPECT().Matches(4).Return(true)
	if match := notMatcher.Matches(4); match {
		t.Errorf("notMatcher should not match 4")
	}

	mockMatcher.EXPECT().Matches(5).Return(false)
	if match := notMatcher.Matches(5); !match {
		t.Errorf("notMatcher should match 5")
	}
}

type Dog struct {
	Breed, Name string
}

// A thorough test of assignableToTypeOfMatcher
func TestAssignableToTypeOfMatcher(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()

	aStr := "def"
	anotherStr := "ghi"

	if match := gomock.AssignableToTypeOf("abc").Matches(4); match {
		t.Errorf(`AssignableToTypeOf("abc") should not match 4`)
	}
	if match := gomock.AssignableToTypeOf("abc").Matches(&aStr); match {
		t.Errorf(`AssignableToTypeOf("abc") should not match &aStr (*string)`)
	}
	if match := gomock.AssignableToTypeOf("abc").Matches("def"); !match {
		t.Errorf(`AssignableToTypeOf("abc") should match "def"`)
	}
	if match := gomock.AssignableToTypeOf(&aStr).Matches("abc"); match {
		t.Errorf(`AssignableToTypeOf(&aStr) should not match "abc"`)
	}
	if match := gomock.AssignableToTypeOf(&aStr).Matches(&anotherStr); !match {
		t.Errorf(`AssignableToTypeOf(&aStr) should match &anotherStr`)
	}
	if match := gomock.AssignableToTypeOf(0).Matches(4); !match {
		t.Errorf(`AssignableToTypeOf(0) should match 4`)
	}
	if match := gomock.AssignableToTypeOf(0).Matches("def"); match {
		t.Errorf(`AssignableToTypeOf(0) should not match "def"`)
	}
	if match := gomock.AssignableToTypeOf(Dog{}).Matches(&Dog{}); match {
		t.Errorf(`AssignableToTypeOf(Dog{}) should not match &Dog{}`)
	}
	if match := gomock.AssignableToTypeOf(Dog{}).Matches(Dog{Breed: "pug", Name: "Fido"}); !match {
		t.Errorf(`AssignableToTypeOf(Dog{}) should match Dog{Breed: "pug", Name: "Fido"}`)
	}
	if match := gomock.AssignableToTypeOf(&Dog{}).Matches(Dog{}); match {
		t.Errorf(`AssignableToTypeOf(&Dog{}) should not match Dog{}`)
	}
	if match := gomock.AssignableToTypeOf(&Dog{}).Matches(&Dog{Breed: "pug", Name: "Fido"}); !match {
		t.Errorf(`AssignableToTypeOf(&Dog{}) should match &Dog{Breed: "pug", Name: "Fido"}`)
	}
}
