diff options
Diffstat (limited to 'vendor/github.com/smartystreets/assertions/internal/oglematchers/equals.go')
-rw-r--r-- | vendor/github.com/smartystreets/assertions/internal/oglematchers/equals.go | 541 |
1 files changed, 0 insertions, 541 deletions
diff --git a/vendor/github.com/smartystreets/assertions/internal/oglematchers/equals.go b/vendor/github.com/smartystreets/assertions/internal/oglematchers/equals.go deleted file mode 100644 index a510707b..00000000 --- a/vendor/github.com/smartystreets/assertions/internal/oglematchers/equals.go +++ /dev/null @@ -1,541 +0,0 @@ -// Copyright 2011 Aaron Jacobs. All Rights Reserved. -// Author: aaronjjacobs@gmail.com (Aaron Jacobs) -// -// 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. - -package oglematchers - -import ( - "errors" - "fmt" - "math" - "reflect" -) - -// Equals(x) returns a matcher that matches values v such that v and x are -// equivalent. This includes the case when the comparison v == x using Go's -// built-in comparison operator is legal (except for structs, which this -// matcher does not support), but for convenience the following rules also -// apply: -// -// * Type checking is done based on underlying types rather than actual -// types, so that e.g. two aliases for string can be compared: -// -// type stringAlias1 string -// type stringAlias2 string -// -// a := "taco" -// b := stringAlias1("taco") -// c := stringAlias2("taco") -// -// ExpectTrue(a == b) // Legal, passes -// ExpectTrue(b == c) // Illegal, doesn't compile -// -// ExpectThat(a, Equals(b)) // Passes -// ExpectThat(b, Equals(c)) // Passes -// -// * Values of numeric type are treated as if they were abstract numbers, and -// compared accordingly. Therefore Equals(17) will match int(17), -// int16(17), uint(17), float32(17), complex64(17), and so on. -// -// If you want a stricter matcher that contains no such cleverness, see -// IdenticalTo instead. -// -// Arrays are supported by this matcher, but do not participate in the -// exceptions above. Two arrays compared with this matcher must have identical -// types, and their element type must itself be comparable according to Go's == -// operator. -func Equals(x interface{}) Matcher { - v := reflect.ValueOf(x) - - // This matcher doesn't support structs. - if v.Kind() == reflect.Struct { - panic(fmt.Sprintf("oglematchers.Equals: unsupported kind %v", v.Kind())) - } - - // The == operator is not defined for non-nil slices. - if v.Kind() == reflect.Slice && v.Pointer() != uintptr(0) { - panic(fmt.Sprintf("oglematchers.Equals: non-nil slice")) - } - - return &equalsMatcher{v} -} - -type equalsMatcher struct { - expectedValue reflect.Value -} - -//////////////////////////////////////////////////////////////////////// -// Numeric types -//////////////////////////////////////////////////////////////////////// - -func isSignedInteger(v reflect.Value) bool { - k := v.Kind() - return k >= reflect.Int && k <= reflect.Int64 -} - -func isUnsignedInteger(v reflect.Value) bool { - k := v.Kind() - return k >= reflect.Uint && k <= reflect.Uintptr -} - -func isInteger(v reflect.Value) bool { - return isSignedInteger(v) || isUnsignedInteger(v) -} - -func isFloat(v reflect.Value) bool { - k := v.Kind() - return k == reflect.Float32 || k == reflect.Float64 -} - -func isComplex(v reflect.Value) bool { - k := v.Kind() - return k == reflect.Complex64 || k == reflect.Complex128 -} - -func checkAgainstInt64(e int64, c reflect.Value) (err error) { - err = errors.New("") - - switch { - case isSignedInteger(c): - if c.Int() == e { - err = nil - } - - case isUnsignedInteger(c): - u := c.Uint() - if u <= math.MaxInt64 && int64(u) == e { - err = nil - } - - // Turn around the various floating point types so that the checkAgainst* - // functions for them can deal with precision issues. - case isFloat(c), isComplex(c): - return Equals(c.Interface()).Matches(e) - - default: - err = NewFatalError("which is not numeric") - } - - return -} - -func checkAgainstUint64(e uint64, c reflect.Value) (err error) { - err = errors.New("") - - switch { - case isSignedInteger(c): - i := c.Int() - if i >= 0 && uint64(i) == e { - err = nil - } - - case isUnsignedInteger(c): - if c.Uint() == e { - err = nil - } - - // Turn around the various floating point types so that the checkAgainst* - // functions for them can deal with precision issues. - case isFloat(c), isComplex(c): - return Equals(c.Interface()).Matches(e) - - default: - err = NewFatalError("which is not numeric") - } - - return -} - -func checkAgainstFloat32(e float32, c reflect.Value) (err error) { - err = errors.New("") - - switch { - case isSignedInteger(c): - if float32(c.Int()) == e { - err = nil - } - - case isUnsignedInteger(c): - if float32(c.Uint()) == e { - err = nil - } - - case isFloat(c): - // Compare using float32 to avoid a false sense of precision; otherwise - // e.g. Equals(float32(0.1)) won't match float32(0.1). - if float32(c.Float()) == e { - err = nil - } - - case isComplex(c): - comp := c.Complex() - rl := real(comp) - im := imag(comp) - - // Compare using float32 to avoid a false sense of precision; otherwise - // e.g. Equals(float32(0.1)) won't match (0.1 + 0i). - if im == 0 && float32(rl) == e { - err = nil - } - - default: - err = NewFatalError("which is not numeric") - } - - return -} - -func checkAgainstFloat64(e float64, c reflect.Value) (err error) { - err = errors.New("") - - ck := c.Kind() - - switch { - case isSignedInteger(c): - if float64(c.Int()) == e { - err = nil - } - - case isUnsignedInteger(c): - if float64(c.Uint()) == e { - err = nil - } - - // If the actual value is lower precision, turn the comparison around so we - // apply the low-precision rules. Otherwise, e.g. Equals(0.1) may not match - // float32(0.1). - case ck == reflect.Float32 || ck == reflect.Complex64: - return Equals(c.Interface()).Matches(e) - - // Otherwise, compare with double precision. - case isFloat(c): - if c.Float() == e { - err = nil - } - - case isComplex(c): - comp := c.Complex() - rl := real(comp) - im := imag(comp) - - if im == 0 && rl == e { - err = nil - } - - default: - err = NewFatalError("which is not numeric") - } - - return -} - -func checkAgainstComplex64(e complex64, c reflect.Value) (err error) { - err = errors.New("") - realPart := real(e) - imaginaryPart := imag(e) - - switch { - case isInteger(c) || isFloat(c): - // If we have no imaginary part, then we should just compare against the - // real part. Otherwise, we can't be equal. - if imaginaryPart != 0 { - return - } - - return checkAgainstFloat32(realPart, c) - - case isComplex(c): - // Compare using complex64 to avoid a false sense of precision; otherwise - // e.g. Equals(0.1 + 0i) won't match float32(0.1). - if complex64(c.Complex()) == e { - err = nil - } - - default: - err = NewFatalError("which is not numeric") - } - - return -} - -func checkAgainstComplex128(e complex128, c reflect.Value) (err error) { - err = errors.New("") - realPart := real(e) - imaginaryPart := imag(e) - - switch { - case isInteger(c) || isFloat(c): - // If we have no imaginary part, then we should just compare against the - // real part. Otherwise, we can't be equal. - if imaginaryPart != 0 { - return - } - - return checkAgainstFloat64(realPart, c) - - case isComplex(c): - if c.Complex() == e { - err = nil - } - - default: - err = NewFatalError("which is not numeric") - } - - return -} - -//////////////////////////////////////////////////////////////////////// -// Other types -//////////////////////////////////////////////////////////////////////// - -func checkAgainstBool(e bool, c reflect.Value) (err error) { - if c.Kind() != reflect.Bool { - err = NewFatalError("which is not a bool") - return - } - - err = errors.New("") - if c.Bool() == e { - err = nil - } - return -} - -func checkAgainstChan(e reflect.Value, c reflect.Value) (err error) { - // Create a description of e's type, e.g. "chan int". - typeStr := fmt.Sprintf("%s %s", e.Type().ChanDir(), e.Type().Elem()) - - // Make sure c is a chan of the correct type. - if c.Kind() != reflect.Chan || - c.Type().ChanDir() != e.Type().ChanDir() || - c.Type().Elem() != e.Type().Elem() { - err = NewFatalError(fmt.Sprintf("which is not a %s", typeStr)) - return - } - - err = errors.New("") - if c.Pointer() == e.Pointer() { - err = nil - } - return -} - -func checkAgainstFunc(e reflect.Value, c reflect.Value) (err error) { - // Make sure c is a function. - if c.Kind() != reflect.Func { - err = NewFatalError("which is not a function") - return - } - - err = errors.New("") - if c.Pointer() == e.Pointer() { - err = nil - } - return -} - -func checkAgainstMap(e reflect.Value, c reflect.Value) (err error) { - // Make sure c is a map. - if c.Kind() != reflect.Map { - err = NewFatalError("which is not a map") - return - } - - err = errors.New("") - if c.Pointer() == e.Pointer() { - err = nil - } - return -} - -func checkAgainstPtr(e reflect.Value, c reflect.Value) (err error) { - // Create a description of e's type, e.g. "*int". - typeStr := fmt.Sprintf("*%v", e.Type().Elem()) - - // Make sure c is a pointer of the correct type. - if c.Kind() != reflect.Ptr || - c.Type().Elem() != e.Type().Elem() { - err = NewFatalError(fmt.Sprintf("which is not a %s", typeStr)) - return - } - - err = errors.New("") - if c.Pointer() == e.Pointer() { - err = nil - } - return -} - -func checkAgainstSlice(e reflect.Value, c reflect.Value) (err error) { - // Create a description of e's type, e.g. "[]int". - typeStr := fmt.Sprintf("[]%v", e.Type().Elem()) - - // Make sure c is a slice of the correct type. - if c.Kind() != reflect.Slice || - c.Type().Elem() != e.Type().Elem() { - err = NewFatalError(fmt.Sprintf("which is not a %s", typeStr)) - return - } - - err = errors.New("") - if c.Pointer() == e.Pointer() { - err = nil - } - return -} - -func checkAgainstString(e reflect.Value, c reflect.Value) (err error) { - // Make sure c is a string. - if c.Kind() != reflect.String { - err = NewFatalError("which is not a string") - return - } - - err = errors.New("") - if c.String() == e.String() { - err = nil - } - return -} - -func checkAgainstArray(e reflect.Value, c reflect.Value) (err error) { - // Create a description of e's type, e.g. "[2]int". - typeStr := fmt.Sprintf("%v", e.Type()) - - // Make sure c is the correct type. - if c.Type() != e.Type() { - err = NewFatalError(fmt.Sprintf("which is not %s", typeStr)) - return - } - - // Check for equality. - if e.Interface() != c.Interface() { - err = errors.New("") - return - } - - return -} - -func checkAgainstUnsafePointer(e reflect.Value, c reflect.Value) (err error) { - // Make sure c is a pointer. - if c.Kind() != reflect.UnsafePointer { - err = NewFatalError("which is not a unsafe.Pointer") - return - } - - err = errors.New("") - if c.Pointer() == e.Pointer() { - err = nil - } - return -} - -func checkForNil(c reflect.Value) (err error) { - err = errors.New("") - - // Make sure it is legal to call IsNil. - switch c.Kind() { - case reflect.Invalid: - case reflect.Chan: - case reflect.Func: - case reflect.Interface: - case reflect.Map: - case reflect.Ptr: - case reflect.Slice: - - default: - err = NewFatalError("which cannot be compared to nil") - return - } - - // Ask whether the value is nil. Handle a nil literal (kind Invalid) - // specially, since it's not legal to call IsNil there. - if c.Kind() == reflect.Invalid || c.IsNil() { - err = nil - } - return -} - -//////////////////////////////////////////////////////////////////////// -// Public implementation -//////////////////////////////////////////////////////////////////////// - -func (m *equalsMatcher) Matches(candidate interface{}) error { - e := m.expectedValue - c := reflect.ValueOf(candidate) - ek := e.Kind() - - switch { - case ek == reflect.Bool: - return checkAgainstBool(e.Bool(), c) - - case isSignedInteger(e): - return checkAgainstInt64(e.Int(), c) - - case isUnsignedInteger(e): - return checkAgainstUint64(e.Uint(), c) - - case ek == reflect.Float32: - return checkAgainstFloat32(float32(e.Float()), c) - - case ek == reflect.Float64: - return checkAgainstFloat64(e.Float(), c) - - case ek == reflect.Complex64: - return checkAgainstComplex64(complex64(e.Complex()), c) - - case ek == reflect.Complex128: - return checkAgainstComplex128(complex128(e.Complex()), c) - - case ek == reflect.Chan: - return checkAgainstChan(e, c) - - case ek == reflect.Func: - return checkAgainstFunc(e, c) - - case ek == reflect.Map: - return checkAgainstMap(e, c) - - case ek == reflect.Ptr: - return checkAgainstPtr(e, c) - - case ek == reflect.Slice: - return checkAgainstSlice(e, c) - - case ek == reflect.String: - return checkAgainstString(e, c) - - case ek == reflect.Array: - return checkAgainstArray(e, c) - - case ek == reflect.UnsafePointer: - return checkAgainstUnsafePointer(e, c) - - case ek == reflect.Invalid: - return checkForNil(c) - } - - panic(fmt.Sprintf("equalsMatcher.Matches: unexpected kind: %v", ek)) -} - -func (m *equalsMatcher) Description() string { - // Special case: handle nil. - if !m.expectedValue.IsValid() { - return "is nil" - } - - return fmt.Sprintf("%v", m.expectedValue.Interface()) -} |