caddyhttp: Merge query matchers in Caddyfile (#3839)

Also, turns out that `Add` on headers will work even if there's nothing there yet, so we can remove the condition I introduced in #3832

1 files changed, 28 insertions, 0 deletions

diff --git a/caddytest/integration/caddyfile_adapt/matcher_syntax.txt b/caddytest/integration/caddyfile_adapt/matcher_syntax.txt
index 55c06ea01..c5c276075 100644
--- a/caddytest/integration/caddyfile_adapt/matcher_syntax.txt
+++ b/caddytest/integration/caddyfile_adapt/matcher_syntax.txt
@@ -25,6 +25,12 @@
 		header Bar foo
 	}
 	respond @matcher7 "header matcher merging values of the same field"
+
+	@matcher8 {
+		query foo=bar foo=baz bar=foo
+		query bar=baz
+	}
+	respond @matcher8 "query matcher merging pairs with the same keys"
 }
 ----------
 {
@@ -155,6 +161,28 @@
 									"handler": "static_response"
 								}
 							]
+						},
+						{
+							"match": [
+								{
+									"query": {
+										"bar": [
+											"foo",
+											"baz"
+										],
+										"foo": [
+											"bar",
+											"baz"
+										]
+									}
+								}
+							],
+							"handle": [
+								{
+									"body": "query matcher merging pairs with the same keys",
+									"handler": "static_response"
+								}
+							]
 						}
 					]
 				}