library(SEMID)
library(igraph)
context("Testing known examples on graphID.ancestralID.")

source("graphExamples.R")

test_that("graphID.ancestralID returns correct value for known examples.", {
    for (i in 1:length(graphExamples)) {
        graphExample <- graphExamples[[i]]
        L <- graphExample$L
        O <- graphExample$O
        htcId <- graphExample$htcId
        ancId <- graphExample$ancId
        m <- nrow(L)
        if (!is.dag(graph.adjacency(L))) {
            next
        }
        
        result <- graphID.ancestralID(L, O)
        
        if (!is.null(ancId)) {
            if (ancId == 1) {
                expect_equal(sort(result), 1:m)
            } else {
                expect_true(all(result %in% 1:m) && length(result) < m)
            }
        }
        
        if (htcId == 0) {
            expect_true(all(result %in% 1:m) && length(result) < m)
        } else if (htcId == 1) {
            expect_equal(sort(result), 1:m)
        } else {
            expect_true(all(graphID.htcID(L, O) %in% result))
        }
    }
})