assert_ggplot           Assert that an object is a ggplot
canon                   Canonicalise a ggplot specification
check_plot              Framework-agnostic plot check
compare_conceptual      Compare two ggplot objects for conceptual
                        similarity
compare_plots           Compare two ggplot objects
compare_visual          Compare two ggplot objects for visual
                        equivalence
enrich_spec             Enrich a plot's layer specification with
                        build-derived default information
equiv_aes               Compare aesthetic mappings of two ggplot
                        objects
equiv_coord             Compare coordinate systems of two ggplot
                        objects
equiv_data              Compare the data of a layer in two ggplot
                        objects
equiv_facets            Compare facet specification of two ggplot
                        objects
equiv_labels            Compare labels of two ggplot objects
equiv_layers            Compare layer structure of two ggplot objects
equiv_params            Compare parameters of a specific layer in two
                        ggplot objects
equiv_plot              Compare two ggplot objects across multiple
                        dimensions
equiv_rendered          Compare the rendered (built) layer data of two
                        ggplot objects
equiv_scales            Compare scales of two ggplot objects
expect_equiv_plot       testthat expectation for plot equivalence
has_layer               Test whether a plot contains a given layer
is_ggplot               Test whether an object is a ggplot
mapping_exists          Test whether a specific aesthetic mapping
                        exists in a plot
n_layers                Count the number of layers in a ggplot
spec_aes                Extract aesthetic mappings as a long-format
                        tidy data frame
spec_coord              Extract coordinate system specification as a
                        tidy data frame
spec_data               Extract the dataset table for a ggplot object
spec_facets             Extract facet specification as a tidy data
                        frame
spec_labels             Extract plot labels as a tidy data frame
spec_layers             Extract layer specifications as a tidy data
                        frame
spec_plot               Extract the full plot specification as a master
                        tidy data frame
spec_scales             Extract scale specifications as a tidy data
                        frame
