feat: add deployment foundation and cross-device handoff

internal/wire/json_test.go

@@ -0,0 +1,70 @@
+package wire
+
+import (
+	"strings"
+	"testing"
+)
+
+type component struct {
+	Name string `json:"name"`
+}
+type document struct {
+	Components []component `json:"components"`
+}
+
+func TestStrictNestedArrays(t *testing.T) {
+	var doc document
+	if err := Decode(strings.NewReader(`{"components":[{"name":"server"}]}`), &doc, 1024); err != nil || doc.Components[0].Name != "server" {
+		t.Fatal(err)
+	}
+	for _, input := range []string{
+		`{"components":[{"name":"server","command":"secret"}]}`,
+		`{"components":[{}]}`,
+		`{"components":[{"Name":"server"}]}`,
+		`{"components":[null]}`,
+		`{"components":null}`,
+		`{"components":[{"name":null}]}`,
+		`{"components":[{"name":"one","name":"two"}]}`,
+		"{\"components\":[{\"name\":\"\xff\"}]}",
+	} {
+		if Decode(strings.NewReader(input), &doc, 1024) == nil {
+			t.Errorf("accepted malformed nested JSON: %q", input)
+		}
+	}
+}
+
+func TestDecodeBounds(t *testing.T) {
+	var doc document
+	for _, input := range []string{`{"components":[]} {}`, strings.Repeat(" ", 1025) + `{"components":[]}`} {
+		if Decode(strings.NewReader(input), &doc, 1024) == nil {
+			t.Fatal("accepted trailing or oversized input")
+		}
+	}
+}
+
+func TestInvalidDecoderArguments(t *testing.T) {
+	var doc document
+	for _, limit := range []int64{0, -1, 1<<63 - 1} {
+		if Decode(strings.NewReader(`{}`), &doc, limit) == nil {
+			t.Fatal("accepted invalid limit")
+		}
+	}
+	var nilDoc *document
+	for _, target := range []any{nil, doc, nilDoc} {
+		if Decode(strings.NewReader(`{}`), target, 1024) == nil {
+			t.Fatal("accepted invalid target")
+		}
+	}
+}
+
+func TestStrictTypedMaps(t *testing.T) {
+	var target map[string]component
+	for _, input := range []string{`{"api":{"name":"ok","extra":true}}`, `{"api":{"Name":"ok"}}`, `{"api":{}}`, `{"api":null}`} {
+		if Decode(strings.NewReader(input), &target, 1024) == nil {
+			t.Errorf("accepted malformed map entry: %s", input)
+		}
+	}
+	if err := Decode(strings.NewReader(`{"api":{"name":"ok"}}`), &target, 1024); err != nil {
+		t.Fatal(err)
+	}
+}