Function TestEachKeyEmptyKeyPathComponent

empty_key_path_test.go:138–169

============================================================================= EachKey — empty key component emits no callback (SYS-REQ-008) ============================================================================= Verifies: SYS-REQ-008 [boundary] An empty-string path component cannot address an

(t *testing.T)

// must skip the path (missing-request => no callback) and must not panic on
// the `p[level][0]` dereference.
func TestEachKeyEmptyKeyPathComponent(t *testing.T) {
	cases := []struct {
		name  string
		data  string
		paths [][]string
	}{
		{name: "single empty path on array root", data: `[1,2,3]`, paths: [][]string{{""}}},
		{name: "empty path mixed with valid path", data: `{"a":1,"b":2}`, paths: [][]string{{""}, {"a"}}},
		{name: "empty leading component", data: `{"a":1}`, paths: [][]string{{"", "a"}}},
		{name: "empty trailing component", data: `{"a":[1]}`, paths: [][]string{{"a", ""}}},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			emptyCalled := false
			runNoPanic(t, tc.name, func() {
				EachKey([]byte(tc.data), func(idx int, val []byte, dt ValueType, err error) {
					// Callbacks may fire for the valid path, but the empty path
					// must never resolve to a real callback slot.
					if len(tc.paths[idx]) == 0 || tc.paths[idx][0] == "" {
						emptyCalled = true
					}
				}, tc.paths...)
			})
			if emptyCalled {
				t.Fatalf("EachKey(%q,%v) emitted a callback for an empty path component", tc.data, tc.paths)
			}
			// No assertion on the valid-path callback: it may or may not fire
			// depending on the case; the regression gate is "no panic, no
			// callback for the empty component".
		})
	}
}

// =============================================================================
// Set — empty key component produces a defined document, no panic (SYS-REQ-009)