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-rw-r--r--vendor/github.com/smartystreets/assertions/internal/oglematchers/less_than.go152
1 files changed, 152 insertions, 0 deletions
diff --git a/vendor/github.com/smartystreets/assertions/internal/oglematchers/less_than.go b/vendor/github.com/smartystreets/assertions/internal/oglematchers/less_than.go
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+++ b/vendor/github.com/smartystreets/assertions/internal/oglematchers/less_than.go
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+// 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"
+)
+
+// LessThan returns a matcher that matches integer, floating point, or strings
+// values v such that v < x. Comparison is not defined between numeric and
+// string types, but is defined between all integer and floating point types.
+//
+// x must itself be an integer, floating point, or string type; otherwise,
+// LessThan will panic.
+func LessThan(x interface{}) Matcher {
+ v := reflect.ValueOf(x)
+ kind := v.Kind()
+
+ switch {
+ case isInteger(v):
+ case isFloat(v):
+ case kind == reflect.String:
+
+ default:
+ panic(fmt.Sprintf("LessThan: unexpected kind %v", kind))
+ }
+
+ return &lessThanMatcher{v}
+}
+
+type lessThanMatcher struct {
+ limit reflect.Value
+}
+
+func (m *lessThanMatcher) Description() string {
+ // Special case: make it clear that strings are strings.
+ if m.limit.Kind() == reflect.String {
+ return fmt.Sprintf("less than \"%s\"", m.limit.String())
+ }
+
+ return fmt.Sprintf("less than %v", m.limit.Interface())
+}
+
+func compareIntegers(v1, v2 reflect.Value) (err error) {
+ err = errors.New("")
+
+ switch {
+ case isSignedInteger(v1) && isSignedInteger(v2):
+ if v1.Int() < v2.Int() {
+ err = nil
+ }
+ return
+
+ case isSignedInteger(v1) && isUnsignedInteger(v2):
+ if v1.Int() < 0 || uint64(v1.Int()) < v2.Uint() {
+ err = nil
+ }
+ return
+
+ case isUnsignedInteger(v1) && isSignedInteger(v2):
+ if v1.Uint() <= math.MaxInt64 && int64(v1.Uint()) < v2.Int() {
+ err = nil
+ }
+ return
+
+ case isUnsignedInteger(v1) && isUnsignedInteger(v2):
+ if v1.Uint() < v2.Uint() {
+ err = nil
+ }
+ return
+ }
+
+ panic(fmt.Sprintf("compareIntegers: %v %v", v1, v2))
+}
+
+func getFloat(v reflect.Value) float64 {
+ switch {
+ case isSignedInteger(v):
+ return float64(v.Int())
+
+ case isUnsignedInteger(v):
+ return float64(v.Uint())
+
+ case isFloat(v):
+ return v.Float()
+ }
+
+ panic(fmt.Sprintf("getFloat: %v", v))
+}
+
+func (m *lessThanMatcher) Matches(c interface{}) (err error) {
+ v1 := reflect.ValueOf(c)
+ v2 := m.limit
+
+ err = errors.New("")
+
+ // Handle strings as a special case.
+ if v1.Kind() == reflect.String && v2.Kind() == reflect.String {
+ if v1.String() < v2.String() {
+ err = nil
+ }
+ return
+ }
+
+ // If we get here, we require that we are dealing with integers or floats.
+ v1Legal := isInteger(v1) || isFloat(v1)
+ v2Legal := isInteger(v2) || isFloat(v2)
+ if !v1Legal || !v2Legal {
+ err = NewFatalError("which is not comparable")
+ return
+ }
+
+ // Handle the various comparison cases.
+ switch {
+ // Both integers
+ case isInteger(v1) && isInteger(v2):
+ return compareIntegers(v1, v2)
+
+ // At least one float32
+ case v1.Kind() == reflect.Float32 || v2.Kind() == reflect.Float32:
+ if float32(getFloat(v1)) < float32(getFloat(v2)) {
+ err = nil
+ }
+ return
+
+ // At least one float64
+ case v1.Kind() == reflect.Float64 || v2.Kind() == reflect.Float64:
+ if getFloat(v1) < getFloat(v2) {
+ err = nil
+ }
+ return
+ }
+
+ // We shouldn't get here.
+ panic(fmt.Sprintf("lessThanMatcher.Matches: Shouldn't get here: %v %v", v1, v2))
+}