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net/url: add Values.Has

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Adds a method within Values for detecting whether a query parameter is set.

Fixes #45100

Change-Id: I6bb49417e8547e11cc7e8d55c5211d24ee436ec1
GitHub-Last-Rev: 0b27cdab90
GitHub-Pull-Request: golang/go#45835
Reviewed-on: https://go-review.googlesource.com/c/go/+/314850
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
Ian Mckay 2021-04-29 06:30:44 +00:00 committed by Ian Lance Taylor
parent 3366556d1c
commit a893682d83
2 changed files with 21 additions and 3 deletions
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6
src/net/url/url.go
View File

@ -909,6 +909,12 @@ func (v Values) Del(key string) {
delete(v, key)
}
// Has checks whether a given key is set.
func (v Values) Has(key string) bool {
_, ok := v[key]
return ok
}
// ParseQuery parses the URL-encoded query string and returns
// a map listing the values specified for each key.
// ParseQuery always returns a non-nil map containing all the

18
src/net/url/url_test.go
View File

@ -1295,10 +1295,10 @@ func TestResolveReference(t *testing.T) {
}
func TestQueryValues(t *testing.T) {
u, _ := Parse("http://x.com?foo=bar&bar=1&bar=2")
u, _ := Parse("http://x.com?foo=bar&bar=1&bar=2&baz")
v := u.Query()
if len(v) != 2 {
t.Errorf("got %d keys in Query values, want 2", len(v))
if len(v) != 3 {
t.Errorf("got %d keys in Query values, want 3", len(v))
}
if g, e := v.Get("foo"), "bar"; g != e {
t.Errorf("Get(foo) = %q, want %q", g, e)
@ -1313,6 +1313,18 @@ func TestQueryValues(t *testing.T) {
if g, e := v.Get("baz"), ""; g != e {
t.Errorf("Get(baz) = %q, want %q", g, e)
}
if h, e := v.Has("foo"), true; h != e {
t.Errorf("Has(foo) = %t, want %t", h, e)
}
if h, e := v.Has("bar"), true; h != e {
t.Errorf("Has(bar) = %t, want %t", h, e)
}
if h, e := v.Has("baz"), true; h != e {
t.Errorf("Has(baz) = %t, want %t", h, e)
}
if h, e := v.Has("noexist"), false; h != e {
t.Errorf("Has(noexist) = %t, want %t", h, e)
}
v.Del("bar")
if g, e := v.Get("bar"), ""; g != e {
t.Errorf("second Get(bar) = %q, want %q", g, e)