fix: improve support for nested value tags in json data (#31)

* fix: improve support for nested value tags in json data

* fix: AT name

test/acceptance/features/mockhttp.feature

@@ -93,6 +93,33 @@ Feature: HTTP Mock server
       And the HTTP response body must have the JSON properties
           | value | test mock response |
 
+  @mockhttp
+  Scenario: Mock request with full configuration and complex tag nesting
+    Given I store "[UUID]" in context "id"
+      And I mock the HTTP request at "[CONF:httpMockUrl]" with the JSON
+      """
+      {
+        "request": {
+          "method": "POST",
+          "path": "/test/[CTXT:id]"
+        },
+        "response": {
+          "status": 201,
+          "headers": {
+            "Content-Type": ["application/json"]
+          },
+          "body": "{ \"values\": [ { \"type\": \"blacklist\", \"path\": \"/[CTXT:id]-[CTXT:id]\" } ] }"
+        }
+      }
+      """
+    Given the HTTP endpoint "[CONF:httpMockUrl]/test/[CTXT:id]"
+     When I send a HTTP "POST" request
+     Then the HTTP status code must be "201"
+      And the HTTP request headers
+          | Content-Type | application/json |
+      And the HTTP response body must have the JSON properties
+          | values.0.path | /[CTXT:id]-[CTXT:id] |
+
   @mockhttp
   Scenario: Mock request with timeout
     Given I store "[UUID]" in context "id"

value.go

@@ -23,6 +23,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode"
 
 	"github.com/google/uuid"
 )
@@ -213,7 +214,7 @@ func NewComposedTag(s string) Tag {
 
 func (t ComposedTag) findSeparators() (separators []separator) {
 	for i, c := range t.s {
-		if c == '[' {
+		if c == '[' && unicode.IsUpper(rune(t.s[i+1])) {
 			sep := separator{opener: true, pos: i}
 			separators = append(separators, sep)
 		} else if c == ']' {