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// Package shakers provide some checker implementation the go-check.Checker interface.
package shakers
import (
"fmt"
"strings"
"github.com/go-check/check"
)
// Contains checker verifies that obtained value contains a substring.
var Contains check.Checker = &substringChecker{
&check.CheckerInfo{
Name: "Contains",
Params: []string{"obtained", "substring"},
},
strings.Contains,
}
// ContainsAny checker verifies that any Unicode code points in chars
// are in the obtained string.
var ContainsAny check.Checker = &substringChecker{
&check.CheckerInfo{
Name: "ContainsAny",
Params: []string{"obtained", "chars"},
},
strings.ContainsAny,
}
// HasPrefix checker verifies that obtained value has the specified substring as prefix
var HasPrefix check.Checker = &substringChecker{
&check.CheckerInfo{
Name: "HasPrefix",
Params: []string{"obtained", "prefix"},
},
strings.HasPrefix,
}
// HasSuffix checker verifies that obtained value has the specified substring as prefix
var HasSuffix check.Checker = &substringChecker{
&check.CheckerInfo{
Name: "HasSuffix",
Params: []string{"obtained", "suffix"},
},
strings.HasSuffix,
}
// EqualFold checker verifies that obtained value is, interpreted as UTF-8 strings, are equal under Unicode case-folding.
var EqualFold check.Checker = &substringChecker{
&check.CheckerInfo{
Name: "EqualFold",
Params: []string{"obtained", "expected"},
},
strings.EqualFold,
}
type substringChecker struct {
*check.CheckerInfo
substringFunction func(string, string) bool
}
func (checker *substringChecker) Check(params []interface{}, names []string) (bool, string) {
obtained := params[0]
substring := params[1]
substringStr, ok := substring.(string)
if !ok {
return false, fmt.Sprintf("%s value must be a string.", names[1])
}
obtainedString, obtainedIsStr := obtained.(string)
if !obtainedIsStr {
if obtainedWithStringer, obtainedHasStringer := obtained.(fmt.Stringer); obtainedHasStringer {
obtainedString, obtainedIsStr = obtainedWithStringer.String(), true
}
}
if obtainedIsStr {
return checker.substringFunction(obtainedString, substringStr), ""
}
return false, "obtained value is not a string and has no .String()."
}
// IndexAny checker verifies that the index of the first instance of any Unicode code point from chars in the obtained value is equal to expected
var IndexAny check.Checker = &substringCountChecker{
&check.CheckerInfo{
Name: "IndexAny",
Params: []string{"obtained", "chars", "expected"},
},
strings.IndexAny,
}
// Index checker verifies that the index of the first instance of sep in the obtained value is equal to expected
var Index check.Checker = &substringCountChecker{
&check.CheckerInfo{
Name: "Index",
Params: []string{"obtained", "sep", "expected"},
},
strings.Index,
}
// Count checker verifies that obtained value has the specified number of non-overlapping instances of sep
var Count check.Checker = &substringCountChecker{
&check.CheckerInfo{
Name: "Count",
Params: []string{"obtained", "sep", "expected"},
},
strings.Count,
}
type substringCountChecker struct {
*check.CheckerInfo
substringFunction func(string, string) int
}
func (checker *substringCountChecker) Check(params []interface{}, names []string) (bool, string) {
obtained := params[0]
substring := params[1]
expected := params[2]
substringStr, ok := substring.(string)
if !ok {
return false, fmt.Sprintf("%s value must be a string.", names[1])
}
obtainedString, obtainedIsStr := obtained.(string)
if !obtainedIsStr {
if obtainedWithStringer, obtainedHasStringer := obtained.(fmt.Stringer); obtainedHasStringer {
obtainedString, obtainedIsStr = obtainedWithStringer.String(), true
}
}
if obtainedIsStr {
return checker.substringFunction(obtainedString, substringStr) == expected, ""
}
return false, "obtained value is not a string and has no .String()."
}
// IsLower checker verifies that the obtained value is in lower case
var IsLower check.Checker = &stringTransformChecker{
&check.CheckerInfo{
Name: "IsLower",
Params: []string{"obtained"},
},
strings.ToLower,
}
// IsUpper checker verifies that the obtained value is in lower case
var IsUpper check.Checker = &stringTransformChecker{
&check.CheckerInfo{
Name: "IsUpper",
Params: []string{"obtained"},
},
strings.ToUpper,
}
type stringTransformChecker struct {
*check.CheckerInfo
stringFunction func(string) string
}
func (checker *stringTransformChecker) Check(params []interface{}, names []string) (bool, string) {
obtained := params[0]
obtainedString, obtainedIsStr := obtained.(string)
if !obtainedIsStr {
if obtainedWithStringer, obtainedHasStringer := obtained.(fmt.Stringer); obtainedHasStringer {
obtainedString, obtainedIsStr = obtainedWithStringer.String(), true
}
}
if obtainedIsStr {
return checker.stringFunction(obtainedString) == obtainedString, ""
}
return false, "obtained value is not a string and has no .String()."
}
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