feat: Add an AI-Proxy Wasm plugin (#921)

Co-authored-by: 澄潭 <zty98751@alibaba-inc.com>

plugins/wasm-go/extensions/ai-proxy/util/json_test.go

@@ -0,0 +1,28 @@
+package util
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestEscapeForJsonString(t *testing.T) {
+	var tests = []struct {
+		input, output string
+	}{
+		{"hello", "hello"},
+		{"hello\"world", "hello\\\"world"},
+		{"h\be\vl\tlo\rworld\n", "h\\be\\vl\\tlo\\rworld\\n"},
+	}
+
+	for _, tt := range tests {
+		// t.Run enables running "subtests", one for each
+		// table entry. These are shown separately
+		// when executing `go test -v`.
+		testName := tt.input
+		t.Run(testName, func(t *testing.T) {
+			output := EscapeStringForJson(tt.input)
+			assert.Equal(t, tt.output, output)
+		})
+	}
+}