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# error messages work
Code
set_vertex_attr(g, "test", value = c(1, 2))
Condition
Error in `i_set_vertex_attr()`:
! Length of new attribute value must be 1 or 5, the number of target vertices, not 2.
---
Code
set_edge_attr(g, "test", value = c(1, 2))
Condition
Error in `i_set_edge_attr()`:
! Length of new attribute value must be 1 or 10, the number of target edges, not 2.
---
Code
delete_graph_attr(g, "a")
Condition
Error in `delete_graph_attr()`:
! No graph attribute `a` found.
---
Code
delete_vertex_attr(g, "a")
Condition
Error in `delete_vertex_attr()`:
! No vertex attribute `a` found.
---
Code
delete_edge_attr(g, "a")
Condition
Error in `delete_edge_attr()`:
! No edge attribute `a` found.
---
Code
assert_named_list("a")
Condition
Error in `assert_named_list()`:
! `value` must be a named list with unique names
---
Code
assert_named_list(list("a", "b"))
Condition
Error in `assert_named_list()`:
! `value` must be a named list with unique names
# good error message when not using character
Code
set_graph_attr(ring, 1, 1)
Condition
Error in `set_graph_attr()`:
! `name` must be a single string, not the number 1.
# set_vertex_attrs() works
Code
set_vertex_attrs(g)
Condition
Error in `set_vertex_attrs()`:
! All arguments in `...` must be named.
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