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test-data_frame.cpp
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129 lines (95 loc) · 3.36 KB
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#include "cpp11/data_frame.hpp"
#include "cpp11/function.hpp"
#include "cpp11/integers.hpp"
#include "cpp11/strings.hpp"
#include <testthat.h>
context("data_frame-C++") {
test_that("data_frame works") {
auto getExportedValue = cpp11::package("base")["getExportedValue"];
auto mtcars = getExportedValue("datasets", "mtcars");
cpp11::data_frame mtcars_df(mtcars);
expect_true(mtcars_df.nrow() == 32);
expect_true(mtcars_df.ncol() == 11);
cpp11::strings names(mtcars_df.names());
expect_true(names[0] == "mpg");
expect_true(names[7] == "vs");
auto iris = getExportedValue("datasets", "iris");
cpp11::data_frame iris_df(iris);
expect_true(iris_df.nrow() == 150);
expect_true(iris_df.ncol() == 5);
}
test_that("data_frame::nrow works with 0x0 dfs") {
SEXP x = PROTECT(Rf_allocVector(VECSXP, 0));
cpp11::data_frame df(x);
expect_true(df.nrow() == 0);
UNPROTECT(1);
}
test_that("data_frame::nrow works with 10x0 dfs") {
using namespace cpp11::literals;
cpp11::writable::list x(0_xl);
x.attr(R_RowNamesSymbol) = {NA_INTEGER, -10};
cpp11::data_frame df(x);
expect_true(df.nrow() == 10);
}
test_that("writable::data_frame::nrow works with 0x0 dfs") {
SEXP x = PROTECT(Rf_allocVector(VECSXP, 0));
cpp11::writable::data_frame df(x);
expect_true(df.nrow() == 0);
UNPROTECT(1);
}
test_that("writable::data_frame::nrow works with 10x0 dfs (#272)") {
SEXP x = PROTECT(Rf_allocVector(VECSXP, 0));
bool is_altrep = false;
R_xlen_t nrow = 10;
// Manually specify `nrow` using special constructor
cpp11::writable::data_frame df(x, is_altrep, nrow);
expect_true(df.nrow() == 10);
UNPROTECT(1);
}
test_that("writable::data_frame works") {
using namespace cpp11::literals;
cpp11::writable::data_frame df({"x"_nm = {1, 2, 3}, "y"_nm = {"a", "b", "c"}});
auto nrows = df.nrow();
expect_true(df.nrow() == 3);
expect_true(df.ncol() == 2);
cpp11::strings names(df.names());
expect_true(names[0] == "x");
expect_true(names[1] == "y");
cpp11::integers x(df[0]);
expect_true(x[0] == 1);
expect_true(x[1] == 2);
expect_true(x[2] == 3);
cpp11::strings y(df[1]);
expect_true(y[0] == "a");
expect_true(y[1] == "b");
expect_true(y[2] == "c");
SEXP out = df;
std::string clazz(
Rf_translateCharUTF8(STRING_ELT(Rf_getAttrib(out, R_ClassSymbol), 0)));
expect_true(clazz == "data.frame");
cpp11::integers row_names(Rf_getAttrib(out, R_RowNamesSymbol));
expect_true(row_names[0] == 1);
expect_true(row_names[1] == 2);
expect_true(row_names[2] == 3);
}
test_that("can set attributes on a data_frame") {
using namespace cpp11::literals;
cpp11::writable::data_frame df({"x"_nm = {1, 2, 3}, "y"_nm = {"a", "b", "c"}});
df.attr("foo") = "bar";
cpp11::r_string foo = cpp11::strings(df.attr("foo"))[0];
expect_true(foo == "bar");
df.names() = {"a", "b"};
expect_true(cpp11::integers(df["a"])[0] == 1);
expect_true(cpp11::strings(df["b"])[2] == "c");
}
test_that("growing vectors uses proper length") {
using namespace cpp11::literals;
cpp11::writable::integers x, y;
for (int i = 0; i < 10; ++i) {
x.push_back(i);
y.push_back(i);
}
cpp11::writable::data_frame out({"x"_nm = x, "y"_nm = y});
expect_true(out.nrow() == 10);
}
}