tests/testthat/test-arbitrary.R

In dparser: Port of 'Dparser' Package

context("Test grammar parsing on the fly");

test_that("expression specification works", {
  skip_on_os("solaris")

    f <- dparse(system.file("tran.g", package = "dparser"), children_first=FALSE)

    sink("tran.g-1");
    f("
    b       = -1
    d/dt(X) = a*X + Y*Z;
    d/dt(Y) = b*(Y - Z);
    d/dt(Z) = -X*Y + c*Y - Z
    if (t < 0.02 | t > 99.98){
        print
    }
", function(name, value, pos, depth){
    cat(sprintf("name:%s;value:%s;pos:%s;depth:%s\n", name, value, pos, depth))
})
    sink()
    t1 <- readLines("tran.g-1");
    t1c <- readLines("tran.g-1.check");
    test_that("character specification works", {
        expect_equal(t1, t1c);
    })
    ##unlink("tran.g-1.check");file.copy("tran.g-1", "tran.g-1.check");
    unlink("tran.g-1");

    sink("tran.g-2");
    f({
        b       = -1
        d/dt(X) = a*X + Y*Z;
        d/dt(Y) = b*(Y - Z);
        d/dt(Z) = -X*Y + c*Y - Z
        if (t < 0.02 | t > 99.98){
            print
        }
    }, function(name, value, pos, depth){
        cat(sprintf("name:%s;value:%s;pos:%s;depth:%s\n", name, value, pos, depth));
    })
    sink();
    t2 <- readLines("tran.g-2");
    t2c <- readLines("tran.g-2.check");

    expect_equal(t2, t2c);
    unlink("tran.g-2");

})
test_that("function specification works", {
    skip_on_os("solaris");
    ##unlink("tran.g-2.check");file.copy("tran.g-2", "tran.g-2.check");
    f <- dparse(system.file("tran.g", package = "dparser"), children_first=FALSE);
    sink("tran.g-3");
    suppressWarnings(f(function(){
        b       = -1
        d/dt(X) = a*X + Y*Z;
        d/dt(Y) = b*(Y - Z);
        d/dt(Z) = -X*Y + c*Y - Z
        if (t < 0.02 | t > 99.98){
            print
        }
    }, function(name, value, pos, depth){
        cat(sprintf("name:%s;value:%s;pos:%s;depth:%s\n", name, value, pos, depth));
    }))
    sink();
    t3 <- readLines("tran.g-3");
    t3c <- readLines("tran.g-3.check");

    expect_equal(t3, t3c);
    ##unlink("tran.g-3.check");file.copy("tran.g-3", "tran.g-3.check");
    unlink("tran.g-3");
})

gc();