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@everdance everdance fix mutex 221dbe5 Jul 12, 2019
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package mock
import (
"errors"
"fmt"
"reflect"
"regexp"
"runtime"
"strings"
"sync"
"time"
"github.com/davecgh/go-spew/spew"
"github.com/pmezard/go-difflib/difflib"
"github.com/stretchr/objx"
"github.com/stretchr/testify/assert"
)
// TestingT is an interface wrapper around *testing.T
type TestingT interface {
Logf(format string, args ...interface{})
Errorf(format string, args ...interface{})
FailNow()
}
/*
Call
*/
// Call represents a method call and is used for setting expectations,
// as well as recording activity.
type Call struct {
Parent *Mock
// The name of the method that was or will be called.
Method string
// Holds the arguments of the method.
Arguments Arguments
// Holds the arguments that should be returned when
// this method is called.
ReturnArguments Arguments
// Holds the caller info for the On() call
callerInfo []string
// The number of times to return the return arguments when setting
// expectations. 0 means to always return the value.
Repeatability int
// Amount of times this call has been called
totalCalls int
// Call to this method can be optional
optional bool
// Holds a channel that will be used to block the Return until it either
// receives a message or is closed. nil means it returns immediately.
WaitFor <-chan time.Time
waitTime time.Duration
// Holds a handler used to manipulate arguments content that are passed by
// reference. It's useful when mocking methods such as unmarshalers or
// decoders.
RunFn func(Arguments)
}
func newCall(parent *Mock, methodName string, callerInfo []string, methodArguments ...interface{}) *Call {
return &Call{
Parent: parent,
Method: methodName,
Arguments: methodArguments,
ReturnArguments: make([]interface{}, 0),
callerInfo: callerInfo,
Repeatability: 0,
WaitFor: nil,
RunFn: nil,
}
}
func (c *Call) lock() {
c.Parent.mutex.Lock()
}
func (c *Call) unlock() {
c.Parent.mutex.Unlock()
}
// Return specifies the return arguments for the expectation.
//
// Mock.On("DoSomething").Return(errors.New("failed"))
func (c *Call) Return(returnArguments ...interface{}) *Call {
c.lock()
defer c.unlock()
c.ReturnArguments = returnArguments
return c
}
// Once indicates that that the mock should only return the value once.
//
// Mock.On("MyMethod", arg1, arg2).Return(returnArg1, returnArg2).Once()
func (c *Call) Once() *Call {
return c.Times(1)
}
// Twice indicates that that the mock should only return the value twice.
//
// Mock.On("MyMethod", arg1, arg2).Return(returnArg1, returnArg2).Twice()
func (c *Call) Twice() *Call {
return c.Times(2)
}
// Times indicates that that the mock should only return the indicated number
// of times.
//
// Mock.On("MyMethod", arg1, arg2).Return(returnArg1, returnArg2).Times(5)
func (c *Call) Times(i int) *Call {
c.lock()
defer c.unlock()
c.Repeatability = i
return c
}
// WaitUntil sets the channel that will block the mock's return until its closed
// or a message is received.
//
// Mock.On("MyMethod", arg1, arg2).WaitUntil(time.After(time.Second))
func (c *Call) WaitUntil(w <-chan time.Time) *Call {
c.lock()
defer c.unlock()
c.WaitFor = w
return c
}
// After sets how long to block until the call returns
//
// Mock.On("MyMethod", arg1, arg2).After(time.Second)
func (c *Call) After(d time.Duration) *Call {
c.lock()
defer c.unlock()
c.waitTime = d
return c
}
// Run sets a handler to be called before returning. It can be used when
// mocking a method such as unmarshalers that takes a pointer to a struct and
// sets properties in such struct
//
// Mock.On("Unmarshal", AnythingOfType("*map[string]interface{}").Return().Run(func(args Arguments) {
// arg := args.Get(0).(*map[string]interface{})
// arg["foo"] = "bar"
// })
func (c *Call) Run(fn func(args Arguments)) *Call {
c.lock()
defer c.unlock()
c.RunFn = fn
return c
}
// Maybe allows the method call to be optional. Not calling an optional method
// will not cause an error while asserting expectations
func (c *Call) Maybe() *Call {
c.lock()
defer c.unlock()
c.optional = true
return c
}
// On chains a new expectation description onto the mocked interface. This
// allows syntax like.
//
// Mock.
// On("MyMethod", 1).Return(nil).
// On("MyOtherMethod", 'a', 'b', 'c').Return(errors.New("Some Error"))
//go:noinline
func (c *Call) On(methodName string, arguments ...interface{}) *Call {
return c.Parent.On(methodName, arguments...)
}
// Mock is the workhorse used to track activity on another object.
// For an example of its usage, refer to the "Example Usage" section at the top
// of this document.
type Mock struct {
// Represents the calls that are expected of
// an object.
ExpectedCalls []*Call
// Holds the calls that were made to this mocked object.
Calls []Call
// test is An optional variable that holds the test struct, to be used when an
// invalid mock call was made.
test TestingT
// TestData holds any data that might be useful for testing. Testify ignores
// this data completely allowing you to do whatever you like with it.
testData objx.Map
mutex sync.Mutex
}
// TestData holds any data that might be useful for testing. Testify ignores
// this data completely allowing you to do whatever you like with it.
func (m *Mock) TestData() objx.Map {
if m.testData == nil {
m.testData = make(objx.Map)
}
return m.testData
}
/*
Setting expectations
*/
// Test sets the test struct variable of the mock object
func (m *Mock) Test(t TestingT) {
m.mutex.Lock()
defer m.mutex.Unlock()
m.test = t
}
// fail fails the current test with the given formatted format and args.
// In case that a test was defined, it uses the test APIs for failing a test,
// otherwise it uses panic.
func (m *Mock) fail(format string, args ...interface{}) {
m.mutex.Lock()
defer m.mutex.Unlock()
if m.test == nil {
panic(fmt.Sprintf(format, args...))
}
m.test.Errorf(format, args...)
m.test.FailNow()
}
// On starts a description of an expectation of the specified method
// being called.
//
// Mock.On("MyMethod", arg1, arg2)
func (m *Mock) On(methodName string, arguments ...interface{}) *Call {
for _, arg := range arguments {
if v := reflect.ValueOf(arg); v.Kind() == reflect.Func {
panic(fmt.Sprintf("cannot use Func in expectations. Use mock.AnythingOfType(\"%T\")", arg))
}
}
m.mutex.Lock()
defer m.mutex.Unlock()
c := newCall(m, methodName, assert.CallerInfo(), arguments...)
m.ExpectedCalls = append(m.ExpectedCalls, c)
return c
}
// /*
// Recording and responding to activity
// */
func (m *Mock) findExpectedCall(method string, arguments ...interface{}) (int, *Call) {
var expectedCall *Call
for i, call := range m.ExpectedCalls {
if call.Method == method {
_, diffCount := call.Arguments.Diff(arguments)
if diffCount == 0 {
expectedCall = call
if call.Repeatability > -1 {
return i, call
}
}
}
}
return -1, expectedCall
}
func (m *Mock) findClosestCall(method string, arguments ...interface{}) (*Call, string) {
var diffCount int
var closestCall *Call
var err string
for _, call := range m.expectedCalls() {
if call.Method == method {
errInfo, tempDiffCount := call.Arguments.Diff(arguments)
if tempDiffCount < diffCount || diffCount == 0 {
diffCount = tempDiffCount
closestCall = call
err = errInfo
}
}
}
return closestCall, err
}
func callString(method string, arguments Arguments, includeArgumentValues bool) string {
var argValsString string
if includeArgumentValues {
var argVals []string
for argIndex, arg := range arguments {
argVals = append(argVals, fmt.Sprintf("%d: %#v", argIndex, arg))
}
argValsString = fmt.Sprintf("\n\t\t%s", strings.Join(argVals, "\n\t\t"))
}
return fmt.Sprintf("%s(%s)%s", method, arguments.String(), argValsString)
}
// Called tells the mock object that a method has been called, and gets an array
// of arguments to return. Panics if the call is unexpected (i.e. not preceded by
// appropriate .On .Return() calls)
// If Call.WaitFor is set, blocks until the channel is closed or receives a message.
func (m *Mock) Called(arguments ...interface{}) Arguments {
// get the calling function's name
pc, _, _, ok := runtime.Caller(1)
if !ok {
panic("Couldn't get the caller information")
}
functionPath := runtime.FuncForPC(pc).Name()
//Next four lines are required to use GCCGO function naming conventions.
//For Ex: github_com_docker_libkv_store_mock.WatchTree.pN39_github_com_docker_libkv_store_mock.Mock
//uses interface information unlike golang github.com/docker/libkv/store/mock.(*Mock).WatchTree
//With GCCGO we need to remove interface information starting from pN<dd>.
re := regexp.MustCompile("\\.pN\\d+_")
if re.MatchString(functionPath) {
functionPath = re.Split(functionPath, -1)[0]
}
parts := strings.Split(functionPath, ".")
functionName := parts[len(parts)-1]
return m.MethodCalled(functionName, arguments...)
}
// MethodCalled tells the mock object that the given method has been called, and gets
// an array of arguments to return. Panics if the call is unexpected (i.e. not preceded
// by appropriate .On .Return() calls)
// If Call.WaitFor is set, blocks until the channel is closed or receives a message.
func (m *Mock) MethodCalled(methodName string, arguments ...interface{}) Arguments {
m.mutex.Lock()
//TODO: could combine expected and closes in single loop
found, call := m.findExpectedCall(methodName, arguments...)
if found < 0 {
// expected call found but it has already been called with repeatable times
if call != nil {
m.mutex.Unlock()
m.fail("\nassert: mock: The method has been called over %d times.\n\tEither do one more Mock.On(\"%s\").Return(...), or remove extra call.\n\tThis call was unexpected:\n\t\t%s\n\tat: %s", call.totalCalls, methodName, callString(methodName, arguments, true), assert.CallerInfo())
}
// we have to fail here - because we don't know what to do
// as the return arguments. This is because:
//
// a) this is a totally unexpected call to this method,
// b) the arguments are not what was expected, or
// c) the developer has forgotten to add an accompanying On...Return pair.
closestCall, mismatch := m.findClosestCall(methodName, arguments...)
m.mutex.Unlock()
if closestCall != nil {
m.fail("\n\nmock: Unexpected Method Call\n-----------------------------\n\n%s\n\nThe closest call I have is: \n\n%s\n\n%s\nDiff: %s",
callString(methodName, arguments, true),
callString(methodName, closestCall.Arguments, true),
diffArguments(closestCall.Arguments, arguments),
strings.TrimSpace(mismatch),
)
} else {
m.fail("\nassert: mock: I don't know what to return because the method call was unexpected.\n\tEither do Mock.On(\"%s\").Return(...) first, or remove the %s() call.\n\tThis method was unexpected:\n\t\t%s\n\tat: %s", methodName, methodName, callString(methodName, arguments, true), assert.CallerInfo())
}
}
if call.Repeatability == 1 {
call.Repeatability = -1
} else if call.Repeatability > 1 {
call.Repeatability--
}
call.totalCalls++
// add the call
m.Calls = append(m.Calls, *newCall(m, methodName, assert.CallerInfo(), arguments...))
m.mutex.Unlock()
// block if specified
if call.WaitFor != nil {
<-call.WaitFor
} else {
time.Sleep(call.waitTime)
}
m.mutex.Lock()
runFn := call.RunFn
m.mutex.Unlock()
if runFn != nil {
runFn(arguments)
}
m.mutex.Lock()
returnArgs := call.ReturnArguments
m.mutex.Unlock()
return returnArgs
}
/*
Assertions
*/
type assertExpectationser interface {
AssertExpectations(TestingT) bool
}
// AssertExpectationsForObjects asserts that everything specified with On and Return
// of the specified objects was in fact called as expected.
//
// Calls may have occurred in any order.
func AssertExpectationsForObjects(t TestingT, testObjects ...interface{}) bool {
if h, ok := t.(tHelper); ok {
h.Helper()
}
for _, obj := range testObjects {
if m, ok := obj.(Mock); ok {
t.Logf("Deprecated mock.AssertExpectationsForObjects(myMock.Mock) use mock.AssertExpectationsForObjects(myMock)")
obj = &m
}
m := obj.(assertExpectationser)
if !m.AssertExpectations(t) {
t.Logf("Expectations didn't match for Mock: %+v", reflect.TypeOf(m))
return false
}
}
return true
}
// AssertExpectations asserts that everything specified with On and Return was
// in fact called as expected. Calls may have occurred in any order.
func (m *Mock) AssertExpectations(t TestingT) bool {
if h, ok := t.(tHelper); ok {
h.Helper()
}
m.mutex.Lock()
defer m.mutex.Unlock()
var somethingMissing bool
var failedExpectations int
// iterate through each expectation
expectedCalls := m.expectedCalls()
for _, expectedCall := range expectedCalls {
if !expectedCall.optional && !m.methodWasCalled(expectedCall.Method, expectedCall.Arguments) && expectedCall.totalCalls == 0 {
somethingMissing = true
failedExpectations++
t.Logf("FAIL:\t%s(%s)\n\t\tat: %s", expectedCall.Method, expectedCall.Arguments.String(), expectedCall.callerInfo)
} else {
if expectedCall.Repeatability > 0 {
somethingMissing = true
failedExpectations++
t.Logf("FAIL:\t%s(%s)\n\t\tat: %s", expectedCall.Method, expectedCall.Arguments.String(), expectedCall.callerInfo)
} else {
t.Logf("PASS:\t%s(%s)", expectedCall.Method, expectedCall.Arguments.String())
}
}
}
if somethingMissing {
t.Errorf("FAIL: %d out of %d expectation(s) were met.\n\tThe code you are testing needs to make %d more call(s).\n\tat: %s", len(expectedCalls)-failedExpectations, len(expectedCalls), failedExpectations, assert.CallerInfo())
}
return !somethingMissing
}
// AssertNumberOfCalls asserts that the method was called expectedCalls times.
func (m *Mock) AssertNumberOfCalls(t TestingT, methodName string, expectedCalls int) bool {
if h, ok := t.(tHelper); ok {
h.Helper()
}
m.mutex.Lock()
defer m.mutex.Unlock()
var actualCalls int
for _, call := range m.calls() {
if call.Method == methodName {
actualCalls++
}
}
return assert.Equal(t, expectedCalls, actualCalls, fmt.Sprintf("Expected number of calls (%d) does not match the actual number of calls (%d).", expectedCalls, actualCalls))
}
// AssertCalled asserts that the method was called.
// It can produce a false result when an argument is a pointer type and the underlying value changed after calling the mocked method.
func (m *Mock) AssertCalled(t TestingT, methodName string, arguments ...interface{}) bool {
if h, ok := t.(tHelper); ok {
h.Helper()
}
m.mutex.Lock()
defer m.mutex.Unlock()
if !m.methodWasCalled(methodName, arguments) {
var calledWithArgs []string
for _, call := range m.calls() {
calledWithArgs = append(calledWithArgs, fmt.Sprintf("%v", call.Arguments))
}
if len(calledWithArgs) == 0 {
return assert.Fail(t, "Should have called with given arguments",
fmt.Sprintf("Expected %q to have been called with:\n%v\nbut no actual calls happened", methodName, arguments))
}
return assert.Fail(t, "Should have called with given arguments",
fmt.Sprintf("Expected %q to have been called with:\n%v\nbut actual calls were:\n %v", methodName, arguments, strings.Join(calledWithArgs, "\n")))
}
return true
}
// AssertNotCalled asserts that the method was not called.
// It can produce a false result when an argument is a pointer type and the underlying value changed after calling the mocked method.
func (m *Mock) AssertNotCalled(t TestingT, methodName string, arguments ...interface{}) bool {
if h, ok := t.(tHelper); ok {
h.Helper()
}
m.mutex.Lock()
defer m.mutex.Unlock()
if m.methodWasCalled(methodName, arguments) {
return assert.Fail(t, "Should not have called with given arguments",
fmt.Sprintf("Expected %q to not have been called with:\n%v\nbut actually it was.", methodName, arguments))
}
return true
}
func (m *Mock) methodWasCalled(methodName string, expected []interface{}) bool {
for _, call := range m.calls() {
if call.Method == methodName {
_, differences := Arguments(expected).Diff(call.Arguments)
if differences == 0 {
// found the expected call
return true
}
}
}
// we didn't find the expected call
return false
}
func (m *Mock) expectedCalls() []*Call {
return append([]*Call{}, m.ExpectedCalls...)
}
func (m *Mock) calls() []Call {
return append([]Call{}, m.Calls...)
}
/*
Arguments
*/
// Arguments holds an array of method arguments or return values.
type Arguments []interface{}
const (
// Anything is used in Diff and Assert when the argument being tested
// shouldn't be taken into consideration.
Anything = "mock.Anything"
)
// AnythingOfTypeArgument is a string that contains the type of an argument
// for use when type checking. Used in Diff and Assert.
type AnythingOfTypeArgument string
// AnythingOfType returns an AnythingOfTypeArgument object containing the
// name of the type to check for. Used in Diff and Assert.
//
// For example:
// Assert(t, AnythingOfType("string"), AnythingOfType("int"))
func AnythingOfType(t string) AnythingOfTypeArgument {
return AnythingOfTypeArgument(t)
}
// argumentMatcher performs custom argument matching, returning whether or
// not the argument is matched by the expectation fixture function.
type argumentMatcher struct {
// fn is a function which accepts one argument, and returns a bool.
fn reflect.Value
}
func (f argumentMatcher) Matches(argument interface{}) bool {
expectType := f.fn.Type().In(0)
expectTypeNilSupported := false
switch expectType.Kind() {
case reflect.Interface, reflect.Chan, reflect.Func, reflect.Map, reflect.Slice, reflect.Ptr:
expectTypeNilSupported = true
}
argType := reflect.TypeOf(argument)
var arg reflect.Value
if argType == nil {
arg = reflect.New(expectType).Elem()
} else {
arg = reflect.ValueOf(argument)
}
if argType == nil && !expectTypeNilSupported {
panic(errors.New("attempting to call matcher with nil for non-nil expected type"))
}
if argType == nil || argType.AssignableTo(expectType) {
result := f.fn.Call([]reflect.Value{arg})
return result[0].Bool()
}
return false
}
func (f argumentMatcher) String() string {
return fmt.Sprintf("func(%s) bool", f.fn.Type().In(0).Name())
}
// MatchedBy can be used to match a mock call based on only certain properties
// from a complex struct or some calculation. It takes a function that will be
// evaluated with the called argument and will return true when there's a match
// and false otherwise.
//
// Example:
// m.On("Do", MatchedBy(func(req *http.Request) bool { return req.Host == "example.com" }))
//
// |fn|, must be a function accepting a single argument (of the expected type)
// which returns a bool. If |fn| doesn't match the required signature,
// MatchedBy() panics.
func MatchedBy(fn interface{}) argumentMatcher {
fnType := reflect.TypeOf(fn)
if fnType.Kind() != reflect.Func {
panic(fmt.Sprintf("assert: arguments: %s is not a func", fn))
}
if fnType.NumIn() != 1 {
panic(fmt.Sprintf("assert: arguments: %s does not take exactly one argument", fn))
}
if fnType.NumOut() != 1 || fnType.Out(0).Kind() != reflect.Bool {
panic(fmt.Sprintf("assert: arguments: %s does not return a bool", fn))
}
return argumentMatcher{fn: reflect.ValueOf(fn)}
}
// Get Returns the argument at the specified index.
func (args Arguments) Get(index int) interface{} {
if index+1 > len(args) {
panic(fmt.Sprintf("assert: arguments: Cannot call Get(%d) because there are %d argument(s).", index, len(args)))
}
return args[index]
}
// Is gets whether the objects match the arguments specified.
func (args Arguments) Is(objects ...interface{}) bool {
for i, obj := range args {
if obj != objects[i] {
return false
}
}
return true
}
// Diff gets a string describing the differences between the arguments
// and the specified objects.
//
// Returns the diff string and number of differences found.
func (args Arguments) Diff(objects []interface{}) (string, int) {
//TODO: could return string as error and nil for No difference
var output = "\n"
var differences int
var maxArgCount = len(args)
if len(objects) > maxArgCount {
maxArgCount = len(objects)
}
for i := 0; i < maxArgCount; i++ {
var actual, expected interface{}
var actualFmt, expectedFmt string
if len(objects) <= i {
actual = "(Missing)"
actualFmt = "(Missing)"
} else {
actual = objects[i]
actualFmt = fmt.Sprintf("(%[1]T=%[1]v)", actual)
}
if len(args) <= i {
expected = "(Missing)"
expectedFmt = "(Missing)"
} else {
expected = args[i]
expectedFmt = fmt.Sprintf("(%[1]T=%[1]v)", expected)
}
if matcher, ok := expected.(argumentMatcher); ok {
if matcher.Matches(actual) {
output = fmt.Sprintf("%s\t%d: PASS: %s matched by %s\n", output, i, actualFmt, matcher)
} else {
differences++
output = fmt.Sprintf("%s\t%d: FAIL: %s not matched by %s\n", output, i, actualFmt, matcher)
}
} else if reflect.TypeOf(expected) == reflect.TypeOf((*AnythingOfTypeArgument)(nil)).Elem() {
// type checking
if reflect.TypeOf(actual).Name() != string(expected.(AnythingOfTypeArgument)) && reflect.TypeOf(actual).String() != string(expected.(AnythingOfTypeArgument)) {
// not match
differences++
output = fmt.Sprintf("%s\t%d: FAIL: type %s != type %s - %s\n", output, i, expected, reflect.TypeOf(actual).Name(), actualFmt)
}
} else {
// normal checking
if assert.ObjectsAreEqual(expected, Anything) || assert.ObjectsAreEqual(actual, Anything) || assert.ObjectsAreEqual(actual, expected) {
// match
output = fmt.Sprintf("%s\t%d: PASS: %s == %s\n", output, i, actualFmt, expectedFmt)
} else {
// not match
differences++
output = fmt.Sprintf("%s\t%d: FAIL: %s != %s\n", output, i, actualFmt, expectedFmt)
}
}
}
if differences == 0 {
return "No differences.", differences
}
return output, differences
}
// Assert compares the arguments with the specified objects and fails if
// they do not exactly match.
func (args Arguments) Assert(t TestingT, objects ...interface{}) bool {
if h, ok := t.(tHelper); ok {
h.Helper()
}
// get the differences
diff, diffCount := args.Diff(objects)
if diffCount == 0 {
return true
}
// there are differences... report them...
t.Logf(diff)
t.Errorf("%sArguments do not match.", assert.CallerInfo())
return false
}
// String gets the argument at the specified index. Panics if there is no argument, or
// if the argument is of the wrong type.
//
// If no index is provided, String() returns a complete string representation
// of the arguments.
func (args Arguments) String(indexOrNil ...int) string {
if len(indexOrNil) == 0 {
// normal String() method - return a string representation of the args
var argsStr []string
for _, arg := range args {
argsStr = append(argsStr, fmt.Sprintf("%s", reflect.TypeOf(arg)))
}
return strings.Join(argsStr, ",")
} else if len(indexOrNil) == 1 {
// Index has been specified - get the argument at that index
var index = indexOrNil[0]
var s string
var ok bool
if s, ok = args.Get(index).(string); !ok {
panic(fmt.Sprintf("assert: arguments: String(%d) failed because object wasn't correct type: %s", index, args.Get(index)))
}
return s
}
panic(fmt.Sprintf("assert: arguments: Wrong number of arguments passed to String. Must be 0 or 1, not %d", len(indexOrNil)))
}
// Int gets the argument at the specified index. Panics if there is no argument, or
// if the argument is of the wrong type.
func (args Arguments) Int(index int) int {
var s int
var ok bool
if s, ok = args.Get(index).(int); !ok {
panic(fmt.Sprintf("assert: arguments: Int(%d) failed because object wasn't correct type: %v", index, args.Get(index)))
}
return s
}
// Error gets the argument at the specified index. Panics if there is no argument, or
// if the argument is of the wrong type.
func (args Arguments) Error(index int) error {
obj := args.Get(index)
var s error
var ok bool
if obj == nil {
return nil
}
if s, ok = obj.(error); !ok {
panic(fmt.Sprintf("assert: arguments: Error(%d) failed because object wasn't correct type: %v", index, args.Get(index)))
}
return s
}
// Bool gets the argument at the specified index. Panics if there is no argument, or
// if the argument is of the wrong type.
func (args Arguments) Bool(index int) bool {
var s bool
var ok bool
if s, ok = args.Get(index).(bool); !ok {
panic(fmt.Sprintf("assert: arguments: Bool(%d) failed because object wasn't correct type: %v", index, args.Get(index)))
}
return s
}
func typeAndKind(v interface{}) (reflect.Type, reflect.Kind) {
t := reflect.TypeOf(v)
k := t.Kind()
if k == reflect.Ptr {
t = t.Elem()
k = t.Kind()
}
return t, k
}
func diffArguments(expected Arguments, actual Arguments) string {
if len(expected) != len(actual) {
return fmt.Sprintf("Provided %v arguments, mocked for %v arguments", len(expected), len(actual))
}
for x := range expected {
if diffString := diff(expected[x], actual[x]); diffString != "" {
return fmt.Sprintf("Difference found in argument %v:\n\n%s", x, diffString)
}
}
return ""
}
// diff returns a diff of both values as long as both are of the same type and
// are a struct, map, slice or array. Otherwise it returns an empty string.
func diff(expected interface{}, actual interface{}) string {
if expected == nil || actual == nil {
return ""
}
et, ek := typeAndKind(expected)
at, _ := typeAndKind(actual)
if et != at {
return ""
}
if ek != reflect.Struct && ek != reflect.Map && ek != reflect.Slice && ek != reflect.Array {
return ""
}
e := spewConfig.Sdump(expected)
a := spewConfig.Sdump(actual)
diff, _ := difflib.GetUnifiedDiffString(difflib.UnifiedDiff{
A: difflib.SplitLines(e),
B: difflib.SplitLines(a),
FromFile: "Expected",
FromDate: "",
ToFile: "Actual",
ToDate: "",
Context: 1,
})
return diff
}
var spewConfig = spew.ConfigState{
Indent: " ",
DisablePointerAddresses: true,
DisableCapacities: true,
SortKeys: true,
}
type tHelper interface {
Helper()
}
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