context("New isomorphism API") test_that("isomorphic", { g <- graph_(from_literal(A - B - C - A)) expect_true(isomorphic(g, g)) expect_true(isomorphic(g, g, method = "direct")) expect_true(isomorphic(g, g, method = "vf2")) expect_true(isomorphic(g, g, method = "bliss")) g2 <- graph_(from_literal(A - B - C)) expect_false(isomorphic(g, g2)) expect_false(isomorphic(g, g2, method = "direct")) expect_false(isomorphic(g, g2, method = "vf2")) expect_false(isomorphic(g, g2, method = "bliss")) }) test_that("subgraph_isomorphic", { g <- graph_(from_literal(A - B - C - D - E - A)) g2 <- graph_(from_literal(A - B - C - D)) expect_true(subgraph_isomorphic(g2, g)) expect_true(subgraph_isomorphic(g2, g, method = "vf2")) expect_true(subgraph_isomorphic(g2, g, method = "lad")) g3 <- graph_(from_literal(A - B - C - A)) expect_false(subgraph_isomorphic(g3, g)) expect_false(subgraph_isomorphic(g3, g, method = "vf2")) expect_false(subgraph_isomorphic(g3, g, method = "lad")) }) test_that("count_isomorphisms", { g <- graph_(from_literal(A - B - C - D - A)) expect_equal(count_isomorphisms(g, g), 8) g2 <- graph_(from_literal(A - B - C - A)) expect_equal(count_isomorphisms(g, g2), 0) }) test_that("count_subgraph_isomorphisms", { g <- graph_(from_literal(A - B - C - D - A)) g2 <- graph_(from_literal(A - B - C - D)) expect_equal(count_subgraph_isomorphisms(g2, g, method = "lad"), 8) expect_equal(count_subgraph_isomorphisms(g2, g, method = "vf2"), 8) g3 <- graph_(from_literal(A - B - C - A)) expect_equal(count_subgraph_isomorphisms(g3, g, method = "lad"), 0) expect_equal(count_subgraph_isomorphisms(g3, g, method = "vf2"), 0) }) test_that("isomorphisms", { g <- graph_(from_literal(A - B - C - D - A)) g2 <- graph_(from_literal(W - X - Y - Z - W)) res <- list(V(g2)[1,2,3,4], V(g2)[1,4,3,2], V(g2)[2,1,4,3], V(g2)[2,3,4,1], V(g2)[3,2,1,4], V(g2)[3,4,1,2], V(g2)[4,1,2,3], V(g2)[4,3,2,1]) expect_equivalent(isomorphisms(g, g2), res) g3 <- graph_(from_literal(X - Y - Z - X)) expect_equal(isomorphisms(g, g3), list()) }) test_that("subgraph_isomorphisms, lad", { g <- graph_(from_literal(A - B - C - D - A)) g2 <- graph_(from_literal(Z - X - Y)) res <- list(V(g)[1,4,3], V(g)[1,2,3], V(g)[2,1,4], V(g)[2,3,4], V(g)[3,2,1], V(g)[3,4,1], V(g)[4,3,2], V(g)[4,1,2]) expect_equivalent(subgraph_isomorphisms(g2, g, method = "lad"), res) g3 <- graph_(from_literal(X - Y - Z - X)) expect_equal(subgraph_isomorphisms(g3, g, method = "lad"), list()) }) test_that("subgraph_isomorphisms, vf2", { g <- graph_(from_literal(A - B - C - D - A)) g2 <- graph_(from_literal(Z - X - Y)) res <- list(V(g)[1,2,3], V(g)[1,4,3], V(g)[2,1,4], V(g)[2,3,4], V(g)[3,2,1], V(g)[3,4,1], V(g)[4,1,2], V(g)[4,3,2]) expect_equivalent(subgraph_isomorphisms(g2, g, method = "vf2"), res) g3 <- graph_(from_literal(X - Y - Z - X)) expect_equal(subgraph_isomorphisms(g3, g, method = "vf2"), list()) })
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