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Original file line number | Diff line number | Diff line change |
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package validation | ||
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// When returns a validation rule that checks if the specified condition | ||
//is true, validate the value by the specified rules. | ||
func When(condition bool, rules ...Rule) WhenRule { | ||
return WhenRule{ | ||
condition: condition, | ||
rules: rules, | ||
} | ||
} | ||
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// WhenRule is a validation rule that validate element if condition is true. | ||
type WhenRule struct { | ||
condition bool | ||
rules []Rule | ||
} | ||
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// Validate checks if the condition is true, validate value by specified rules. | ||
func (r WhenRule) Validate(value interface{}) error { | ||
if r.condition { | ||
return Validate(value, r.rules...) | ||
} | ||
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return nil | ||
} |
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Original file line number | Diff line number | Diff line change |
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// Copyright 2016 Qiang Xue. All rights reserved. | ||
// Use of this source code is governed by a MIT-style | ||
// license that can be found in the LICENSE file. | ||
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package validation | ||
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import ( | ||
"testing" | ||
) | ||
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func abcValidation(val string) bool { | ||
return val == "abc" | ||
} | ||
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func TestWhen(t *testing.T) { | ||
abcRule := NewStringRule(abcValidation, "wrong_abc") | ||
validateMeRule := NewStringRule(validateMe, "wrong_me") | ||
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tests := []struct { | ||
tag string | ||
condition bool | ||
value interface{} | ||
rules []Rule | ||
err string | ||
}{ | ||
// True condition | ||
{"t1.1", true, nil, []Rule{}, ""}, | ||
{"t1.2", true, "", []Rule{}, ""}, | ||
{"t1.3", true, "", []Rule{abcRule}, ""}, | ||
{"t1.4", true, 12, []Rule{Required}, ""}, | ||
{"t1.5", true, nil, []Rule{Required}, "cannot be blank"}, | ||
{"t1.6", true, "123", []Rule{abcRule}, "wrong_abc"}, | ||
{"t1.7", true, "abc", []Rule{abcRule}, ""}, | ||
{"t1.8", true, "abc", []Rule{abcRule, abcRule}, ""}, | ||
{"t1.9", true, "abc", []Rule{abcRule, validateMeRule}, "wrong_me"}, | ||
{"t1.10", true, "me", []Rule{abcRule, validateMeRule}, "wrong_abc"}, | ||
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// False condition | ||
{"t2.1", false, "", []Rule{}, ""}, | ||
{"t2.2", false, "", []Rule{abcRule}, ""}, | ||
{"t2.3", false, "abc", []Rule{abcRule}, ""}, | ||
{"t2.4", false, "abc", []Rule{abcRule, abcRule}, ""}, | ||
{"t2.5", false, "abc", []Rule{abcRule, validateMeRule}, ""}, | ||
{"t2.6", false, "me", []Rule{abcRule, validateMeRule}, ""}, | ||
{"t2.7", false, "", []Rule{abcRule, validateMeRule}, ""}, | ||
} | ||
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for _, test := range tests { | ||
err := Validate(test.value, When(test.condition, test.rules...)) | ||
assertError(t, test.err, err, test.tag) | ||
} | ||
} |