inst/tinytest/test_browse_dot_graph.r

In stasvlasov/nstandr: Name Standardization in R

## -------->>  [[file:../../nstandr.src.org::*visualize][visualize:2]]
paste_dot_node_tr_td <- nstandr:::paste_dot_node_tr_td

expect_equal(paste_dot_node_tr_td(NULL)
           , NULL)

expect_equal(paste_dot_node_tr_td("")
           , NULL)

expect_equal(
    paste_dot_node_tr_td("Hello", i = TRUE, b = TRUE, font = "Arial", bg_color = "blue")
  , "<TR><TD BGCOLOR=\"blue\"><I><B><FONT FACE=\"Arial\">Hello</FONT></B></I></TD></TR>")


paste_dot_node <- nstandr:::paste_dot_node

expect_equal(
    paste_dot_node("name_standardization_procedure", 1)

  , "node_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">name_standardization_procedure</FONT></TD></TR></TABLE>>];"
)

expect_equal(
    paste_dot_node("name_standardization_procedure", 1, "Name Standardization Procedure")

  , "node_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Name Standardization Procedure</TD></TR></TABLE>>];"
)

expect_equal(
    paste_dot_node(call("name_standardization_procedure"), 1, add_procedure_args = TRUE)

  , "node_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">name_standardization_procedure</FONT></TD></TR></TABLE>>];"
)

expect_equal(
    paste_dot_node(call("name_standardization_procedure", arg1 = 1, arg2 = 2), 1, add_procedure_args = TRUE)

  , "node_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">name_standardization_procedure</FONT></TD></TR><TR><TD><FONT FACE=\"Courier\">(arg1 = 1, arg2 = 2)</FONT></TD></TR></TABLE>>];"
)

## test examples
expect_equal(
    paste_dot_node("magerman_remove_double_spaces", 1, add_example = TRUE)

  , "node_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Removes double spaces</TD></TR><TR><TD><I>'  ' -&gt; ' '</I></TD></TR></TABLE>>];")







procedures_list <- list(
    "this is a" = "a"
  , "b"
  , "c" = list(1,2,3)
  , "e"
  , "f" = list(4,5,6)
)

make_dot_nodes <- nstandr:::make_dot_nodes


expect_equal(
    procedures_list |>
    make_dot_nodes() |>
    paste0(collapse = "\n")
  , "node_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">this is a</TD></TR></TABLE>>];\nnode_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">b</FONT></TD></TR></TABLE>>];\nsubgraph cluster_3 {\n    label=\"c\";\n    bgcolor=\"#ecf0f1\";\n    fontname=\"Helvetica\"\n    node_3_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">1</FONT></TD></TR></TABLE>>];\n    node_3_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">2</FONT></TD></TR></TABLE>>];\n    node_3_3 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">3</FONT></TD></TR></TABLE>>];\n}\nnode_4 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">e</FONT></TD></TR></TABLE>>];\nsubgraph cluster_5 {\n    label=\"f\";\n    bgcolor=\"#ecf0f1\";\n    fontname=\"Helvetica\"\n    node_5_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">4</FONT></TD></TR></TABLE>>];\n    node_5_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">5</FONT></TD></TR></TABLE>>];\n    node_5_3 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">6</FONT></TD></TR></TABLE>>];\n}")


make_dot_edges <- nstandr:::make_dot_edges

expect_equal(
    procedures_list |>
    make_dot_edges() |>
    paste(collapse = "\n")
  , "node_1 -> node_2 [];\nnode_2 -> node_3_1 [lhead = \"cluster_3\"];\n// cluster_3\n  node_3_1 -> node_3_2 [];\n  node_3_2 -> node_3_3 [];\nnode_3_3 -> node_4 [];\nnode_4 -> node_5_1 [lhead = \"cluster_5\"];\n// cluster_5\n  node_5_1 -> node_5_2 [];\n  node_5_2 -> node_5_3 [];")



expect_equal(procedures_list |>
             make_dot_graph()
           , "digraph nstantr_procedures {\n  compound=true;\n  node [shape = plain, fontname = Helvetica]\n  node_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">this is a</TD></TR></TABLE>>];\n  node_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">b</FONT></TD></TR></TABLE>>];\n  subgraph cluster_3 {\n      label=\"c\";\n      bgcolor=\"#ecf0f1\";\n      fontname=\"Helvetica\"\n      node_3_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">1</FONT></TD></TR></TABLE>>];\n      node_3_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">2</FONT></TD></TR></TABLE>>];\n      node_3_3 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">3</FONT></TD></TR></TABLE>>];\n  }\n  node_4 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">e</FONT></TD></TR></TABLE>>];\n  subgraph cluster_5 {\n      label=\"f\";\n      bgcolor=\"#ecf0f1\";\n      fontname=\"Helvetica\"\n      node_5_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">4</FONT></TD></TR></TABLE>>];\n      node_5_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">5</FONT></TD></TR></TABLE>>];\n      node_5_3 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\"><FONT FACE=\"Courier\">6</FONT></TD></TR></TABLE>>];\n  }\n  node_1 -> node_2 [];\n  node_2 -> node_3_1 [lhead = \"cluster_3\"];\n  // cluster_3\n    node_3_1 -> node_3_2 [];\n    node_3_2 -> node_3_3 [];\n  node_3_3 -> node_4 [];\n  node_4 -> node_5_1 [lhead = \"cluster_5\"];\n  // cluster_5\n    node_5_1 -> node_5_2 [];\n    node_5_2 -> node_5_3 [];\n}")


save_dot_graph_as <- nstandr:::save_dot_graph_as

if(system("which dot", intern = TRUE, ignore.stdout = TRUE, ignore.stderr = TRUE) |>
   suppressWarnings() |>
   attr("status", exact = TRUE) |>
   is.null()) {

    expect_equal(
        make_dot_graph(procedures_list) |>
        save_dot_graph_as(save_as = "svg")
      , c("<?xml version=\"1.0\" encoding=\"UTF-8\"?>", "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"69\" height=\"507\" viewBox=\"0 0 69 507\">", 
"<defs>", "<g>", "<g id=\"glyph-0-0\">", "<path d=\"M 0.703125 2 L 0.703125 -10 L 7.703125 -10 L 7.703125 2 Z M 1.484375 1 L 6.921875 1 L 6.921875 -9 L 1.484375 -9 Z M 1.484375 1 \"/>", 
"</g>", "<g id=\"glyph-0-1\">", "<path d=\"M 6.828125 -7 L 6.828125 -6 C 6.472656 -6.332031 6.113281 -6.582031 5.75 -6.75 C 5.394531 -6.914062 5.035156 -7 4.671875 -7 C 3.859375 -7 3.222656 -6.734375 2.765625 -6.203125 C 2.316406 -5.679688 2.09375 -4.945312 2.09375 -4 C 2.09375 -3.050781 2.316406 -2.3125 2.765625 -1.78125 C 3.222656 -1.257812 3.859375 -1 4.671875 -1 C 5.035156 -1 5.394531 -1.082031 5.75 -1.25 C 6.113281 -1.414062 6.472656 -1.664062 6.828125 -2 L 6.828125 -1 C 6.472656 -0.664062 6.109375 -0.414062 5.734375 -0.25 C 5.359375 -0.0820312 4.957031 0 4.53125 0 C 3.382812 0 2.46875 -0.359375 1.78125 -1.078125 C 1.101562 -1.796875 0.765625 -2.769531 0.765625 -4 C 0.765625 -5.238281 1.109375 -6.210938 1.796875 -6.921875 C 2.484375 -7.640625 3.425781 -8 4.625 -8 C 5.007812 -8 5.382812 -7.914062 5.75 -7.75 C 6.125 -7.582031 6.484375 -7.332031 6.828125 -7 Z M 6.828125 -7 \"/>", 
"</g>", "<g id=\"glyph-0-2\">", "<path d=\"M 5.203125 -11 L 5.203125 -10 L 4 -10 C 3.550781 -10 3.238281 -9.90625 3.0625 -9.71875 C 2.882812 -9.53125 2.796875 -9.191406 2.796875 -8.703125 L 2.796875 -8 L 4.859375 -8 L 4.859375 -7 L 2.796875 -7 L 2.796875 0 L 1.53125 0 L 1.53125 -7 L 0.328125 -7 L 0.328125 -8 L 1.53125 -8 L 1.53125 -8.546875 C 1.53125 -9.398438 1.726562 -10.019531 2.125 -10.40625 C 2.519531 -10.800781 3.144531 -11 4 -11 Z M 5.203125 -11 \"/>", 
"</g>", "<g id=\"glyph-0-3\">", "<path d=\"M 2.5625 -10 L 2.5625 -8 L 5.15625 -8 L 5.15625 -7 L 2.5625 -7 L 2.5625 -2.5625 C 2.5625 -1.894531 2.644531 -1.46875 2.8125 -1.28125 C 2.988281 -1.09375 3.335938 -1 3.859375 -1 L 5.15625 -1 L 5.15625 0 L 3.859375 0 C 2.890625 0 2.21875 -0.179688 1.84375 -0.546875 C 1.476562 -0.921875 1.296875 -1.59375 1.296875 -2.5625 L 1.296875 -7 L 0.375 -7 L 0.375 -8 L 1.296875 -8 L 1.296875 -10 Z M 2.5625 -10 \"/>", 
"</g>", "<g id=\"glyph-0-4\">", "<path d=\"M 7.6875 -5 L 7.6875 0 L 6.421875 0 L 6.421875 -4.953125 C 6.421875 -5.640625 6.28125 -6.148438 6 -6.484375 C 5.71875 -6.828125 5.289062 -7 4.71875 -7 C 4.039062 -7 3.503906 -6.789062 3.109375 -6.375 C 2.722656 -5.96875 2.53125 -5.40625 2.53125 -4.6875 L 2.53125 0 L 1.265625 0 L 1.265625 -11 L 2.53125 -11 L 2.53125 -7 C 2.832031 -7.332031 3.1875 -7.582031 3.59375 -7.75 C 4 -7.914062 4.472656 -8 5.015625 -8 C 5.890625 -8 6.550781 -7.742188 7 -7.234375 C 7.457031 -6.734375 7.6875 -5.988281 7.6875 -5 Z M 7.6875 -5 \"/>", 
"</g>", "<g id=\"glyph-0-5\">", "<path d=\"M 1.3125 -8 L 2.578125 -8 L 2.578125 0 L 1.3125 0 Z M 1.3125 -11 L 2.578125 -11 L 2.578125 -9 L 1.3125 -9 Z M 1.3125 -11 \"/>", 
"</g>", "<g id=\"glyph-0-6\">", "<path d=\"M 6.203125 -7 L 6.203125 -6 C 5.847656 -6.332031 5.476562 -6.582031 5.09375 -6.75 C 4.707031 -6.914062 4.3125 -7 3.90625 -7 C 3.28125 -7 2.8125 -6.894531 2.5 -6.6875 C 2.1875 -6.476562 2.03125 -6.164062 2.03125 -5.75 C 2.03125 -5.425781 2.140625 -5.175781 2.359375 -5 C 2.585938 -4.820312 3.039062 -4.648438 3.71875 -4.484375 L 4.140625 -4.40625 C 5.035156 -4.21875 5.671875 -3.957031 6.046875 -3.625 C 6.421875 -3.289062 6.609375 -2.820312 6.609375 -2.21875 C 6.609375 -1.539062 6.328125 -1 5.765625 -0.59375 C 5.203125 -0.195312 4.429688 0 3.453125 0 C 3.035156 0 2.601562 -0.0820312 2.15625 -0.25 C 1.71875 -0.414062 1.253906 -0.664062 0.765625 -1 L 0.765625 -2 C 1.234375 -1.664062 1.691406 -1.414062 2.140625 -1.25 C 2.585938 -1.082031 3.03125 -1 3.46875 -1 C 4.0625 -1 4.515625 -1.097656 4.828125 -1.296875 C 5.148438 -1.503906 5.3125 -1.796875 5.3125 -2.171875 C 5.3125 -2.515625 5.195312 -2.78125 4.96875 -2.96875 C 4.738281 -3.15625 4.234375 -3.332031 3.453125 -3.5 L 3.015625 -3.59375 C 2.234375 -3.757812 1.671875 -4.007812 1.328125 -4.34375 C 0.984375 -4.6875 0.8125 -5.15625 0.8125 -5.75 C 0.8125 -6.46875 1.066406 -7.019531 1.578125 -7.40625 C 2.085938 -7.800781 2.8125 -8 3.75 -8 C 4.21875 -8 4.65625 -7.914062 5.0625 -7.75 C 5.476562 -7.582031 5.859375 -7.332031 6.203125 -7 Z M 6.203125 -7 \"/>", 
"</g>", "<g id=\"glyph-0-7\">", "</g>", "<g id=\"glyph-0-8\">", 
"<path d=\"M 4.796875 -4 C 3.773438 -4 3.066406 -3.878906 2.671875 -3.640625 C 2.285156 -3.410156 2.09375 -3.015625 2.09375 -2.453125 C 2.09375 -2.003906 2.238281 -1.648438 2.53125 -1.390625 C 2.820312 -1.128906 3.222656 -1 3.734375 -1 C 4.429688 -1 4.988281 -1.242188 5.40625 -1.734375 C 5.832031 -2.222656 6.046875 -2.875 6.046875 -3.6875 L 6.046875 -4 Z M 7.3125 -4.53125 L 7.3125 0 L 6.046875 0 L 6.046875 -1 C 5.753906 -0.65625 5.394531 -0.398438 4.96875 -0.234375 C 4.539062 -0.078125 4.019531 0 3.40625 0 C 2.625 0 2 -0.21875 1.53125 -0.65625 C 1.070312 -1.09375 0.84375 -1.675781 0.84375 -2.40625 C 0.84375 -3.269531 1.128906 -3.914062 1.703125 -4.34375 C 2.273438 -4.78125 3.132812 -5 4.28125 -5 L 6.046875 -5 L 6.046875 -5.1875 C 6.046875 -5.757812 5.851562 -6.203125 5.46875 -6.515625 C 5.09375 -6.835938 4.5625 -7 3.875 -7 C 3.4375 -7 3.007812 -7 2.59375 -7 C 2.1875 -7 1.789062 -7 1.40625 -7 L 1.40625 -8 C 1.863281 -8 2.304688 -8 2.734375 -8 C 3.171875 -8 3.597656 -8 4.015625 -8 C 5.117188 -8 5.941406 -7.710938 6.484375 -7.140625 C 7.035156 -6.566406 7.3125 -5.695312 7.3125 -4.53125 Z M 7.3125 -4.53125 \"/>", 
"</g>", "<g id=\"glyph-1-0\">", "</g>", "<g id=\"glyph-1-1\">", 
"<path d=\"M 3.71875 0 C 3.332031 0 2.972656 -0.0859375 2.640625 -0.265625 C 2.316406 -0.441406 2.046875 -0.6875 1.828125 -1 L 1.484375 0 L 0.84375 0 L 0.84375 -10 L 1.984375 -10 L 1.984375 -9.890625 C 1.929688 -9.835938 1.894531 -9.773438 1.875 -9.703125 C 1.863281 -9.628906 1.859375 -9.507812 1.859375 -9.34375 L 1.859375 -5.828125 C 2.066406 -6.179688 2.34375 -6.460938 2.6875 -6.671875 C 3.039062 -6.890625 3.398438 -7 3.765625 -7 C 4.535156 -7 5.164062 -6.710938 5.65625 -6.140625 C 6.144531 -5.578125 6.390625 -4.71875 6.390625 -3.5625 C 6.390625 -2.769531 6.257812 -2.109375 6 -1.578125 C 5.738281 -1.054688 5.40625 -0.660156 5 -0.390625 C 4.59375 -0.128906 4.164062 0 3.71875 0 Z M 3.59375 -0.890625 C 3.894531 -0.890625 4.179688 -0.96875 4.453125 -1.125 C 4.722656 -1.289062 4.941406 -1.566406 5.109375 -1.953125 C 5.273438 -2.335938 5.359375 -2.851562 5.359375 -3.5 C 5.359375 -4.394531 5.195312 -5.050781 4.875 -5.46875 C 4.550781 -5.894531 4.132812 -6.109375 3.625 -6.109375 C 3.113281 -6.109375 2.691406 -5.863281 2.359375 -5.375 C 2.023438 -4.882812 1.859375 -4.25 1.859375 -3.46875 C 1.859375 -2.6875 1.988281 -2.0625 2.25 -1.59375 C 2.519531 -1.125 2.96875 -0.890625 3.59375 -0.890625 Z M 3.59375 -0.890625 \"/>", 
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"</g>", "<path fill=\"none\" stroke-width=\"1\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\" stroke=\"rgb(0%, 0%, 0%)\" stroke-opacity=\"1\" stroke-miterlimit=\"10\" d=\"M 30.5 -130.417969 C 30.5 -123.453125 30.5 -113.574219 30.5 -104.761719 \" transform=\"matrix(1, 0, 0, 1, 4, 503)\"/>", 
"<path fill-rule=\"nonzero\" fill=\"rgb(0%, 0%, 0%)\" fill-opacity=\"1\" stroke-width=\"1\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\" stroke=\"rgb(0%, 0%, 0%)\" stroke-opacity=\"1\" stroke-miterlimit=\"10\" d=\"M 34 -104.78125 L 30.5 -94.78125 L 27 -104.78125 Z M 34 -104.78125 \" transform=\"matrix(1, 0, 0, 1, 4, 503)\"/>", 
"<path fill-rule=\"nonzero\" fill=\"rgb(100%, 100%, 100%)\" fill-opacity=\"1\" d=\"M 28 487 L 28 466 L 41 466 L 41 487 Z M 28 487 \"/>", 
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)

    expect_equal(
        make_dot_graph(procedures_list) |>
        save_dot_graph_as(save_as = "svg", width = 50, height = 50)
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"</g>", "<g id=\"glyph-0-7\">", "</g>", "<g id=\"glyph-0-8\">", 
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"</g>", "<g id=\"glyph-1-0\">", "</g>", "<g id=\"glyph-1-1\">", 
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"</g>", "<g id=\"glyph-1-4\">", "<path d=\"M 0.328125 0 C 0.285156 0 0.242188 -0.0078125 0.203125 -0.03125 C 0.160156 -0.0507812 0.125 -0.078125 0.09375 -0.109375 L 0.15625 -0.203125 L 0.171875 -0.21875 L 0.171875 -0.203125 C 0.171875 -0.203125 0.171875 -0.195312 0.171875 -0.1875 C 0.179688 -0.175781 0.191406 -0.164062 0.203125 -0.15625 C 0.210938 -0.132812 0.226562 -0.117188 0.25 -0.109375 C 0.269531 -0.0976562 0.296875 -0.09375 0.328125 -0.09375 C 0.378906 -0.09375 0.414062 -0.109375 0.4375 -0.140625 C 0.46875 -0.179688 0.484375 -0.234375 0.484375 -0.296875 C 0.484375 -0.367188 0.460938 -0.421875 0.421875 -0.453125 C 0.378906 -0.484375 0.320312 -0.492188 0.25 -0.484375 L 0.25 -0.578125 C 0.3125 -0.578125 0.351562 -0.582031 0.375 -0.59375 C 0.40625 -0.613281 0.425781 -0.640625 0.4375 -0.671875 C 0.445312 -0.703125 0.453125 -0.734375 0.453125 -0.765625 C 0.453125 -0.804688 0.441406 -0.835938 0.421875 -0.859375 C 0.398438 -0.890625 0.375 -0.90625 0.34375 -0.90625 C 0.3125 -0.90625 0.28125 -0.898438 0.25 -0.890625 C 0.226562 -0.878906 0.207031 -0.859375 0.1875 -0.828125 L 0.125 -0.90625 C 0.15625 -0.9375 0.1875 -0.957031 0.21875 -0.96875 C 0.257812 -0.988281 0.296875 -1 0.328125 -1 C 0.398438 -1 0.457031 -0.976562 0.5 -0.9375 C 0.539062 -0.894531 0.5625 -0.835938 0.5625 -0.765625 C 0.5625 -0.710938 0.550781 -0.664062 0.53125 -0.625 C 0.507812 -0.59375 0.472656 -0.566406 0.421875 -0.546875 C 0.472656 -0.523438 0.515625 -0.492188 0.546875 -0.453125 C 0.578125 -0.410156 0.59375 -0.359375 0.59375 -0.296875 C 0.59375 -0.242188 0.582031 -0.191406 0.5625 -0.140625 C 0.539062 -0.0976562 0.507812 -0.0625 0.46875 -0.03125 C 0.425781 -0.0078125 0.378906 0 0.328125 0 Z M 0.328125 0 \"/>", 
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}

## test examples
expect_equal(

    make_dot_graph(nstandr:::nstandr_magerman_procedures_list)

  , "digraph nstantr_procedures {\n  compound=true;\n  node [shape = plain, fontname = Helvetica]\n  subgraph cluster_1 {\n      label=\"Prepossessing\";\n      bgcolor=\"#ecf0f1\";\n      fontname=\"Helvetica\"\n      node_1_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Upper casing</TD></TR></TABLE>>];\n      node_1_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Cleaning spaces</TD></TR></TABLE>>];\n  }\n  subgraph cluster_2 {\n      label=\"Characters\";\n      bgcolor=\"#ecf0f1\";\n      fontname=\"Helvetica\"\n      node_2_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Removing HTML codes</TD></TR><TR><TD><I>`&lt;BR&gt;` -&gt; ' '</I></TD></TR></TABLE>>];\n      node_2_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Cleaning spaces (2)</TD></TR></TABLE>>];\n      node_2_3 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Replacing SGML coded characters</TD></TR><TR><TD><I>&amp;AMP;EXCL; -&gt; !</I></TD></TR></TABLE>>];\n      node_2_4 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Replacing proprietary characters</TD></TR><TR><TD><I>{UMLAUT OVER (A)} -&gt; Ä</I></TD></TR></TABLE>>];\n      node_2_5 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Detecting Umlauts</TD></TR><TR><TD><I>GLÜHLAMPEN -&gt; GLUEHLAMPEN</I></TD></TR></TABLE>>];\n      node_2_6 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Replacing accented characters</TD></TR><TR><TD><I>Æ -&gt; AE</I></TD></TR></TABLE>>];\n  }\n  subgraph cluster_3 {\n      label=\"Punctuation\";\n      bgcolor=\"#ecf0f1\";\n      fontname=\"Helvetica\"\n      node_3_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Removing special characters</TD></TR><TR><TD><I>'©%^_' -&gt; ' '</I></TD></TR></TABLE>>];\n      node_3_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Fixing quotation irregularities</TD></TR><TR><TD><I>\"\"IBM\" -&gt; \"IBM\"</I></TD></TR></TABLE>>];\n      node_3_3 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Removing double quotations</TD></TR><TR><TD><I>\"\"IBM Co.\"\" -&gt; IBM Co.</I></TD></TR></TABLE>>];\n      node_3_4 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Removing non alphanumeric characters (1)</TD></TR><TR><TD><I>.IBM Co. -&gt; IBM Co.</I></TD></TR></TABLE>>];\n      node_3_5 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Removing non alphanumeric characters (2)</TD></TR><TR><TD><I>IBM Co., DITE : -&gt; IBM Co.</I></TD></TR></TABLE>>];\n      node_3_6 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Fixing comma and period irregularities</TD></TR><TR><TD><I>' CO.,INC.' -&gt; ' CO., INC.'</I></TD></TR></TABLE>>];\n  }\n  subgraph cluster_4 {\n      label=\"Legal forms\";\n      bgcolor=\"#ecf0f1\";\n      fontname=\"Helvetica\"\n      node_4_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Detecting legal form</TD></TR></TABLE>>];\n      node_4_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Removing legal form</TD></TR><TR><TD><I>IBM INC. -&gt; IBM</I></TD></TR></TABLE>>];\n  }\n  subgraph cluster_5 {\n      label=\"Common words\";\n      bgcolor=\"#ecf0f1\";\n      fontname=\"Helvetica\"\n      node_5_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Removing common words</TD></TR><TR><TD><I>3COM CORPORATION -&gt; 3COM</I></TD></TR></TABLE>>];\n      node_5_2 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Fixing spelling variations</TD></TR><TR><TD><I>INTERNATIONALE -&gt; INTERNATIONAL</I></TD></TR></TABLE>>];\n      node_5_3 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Condensing</TD></TR><TR><TD><I>3 COM -&gt; 3COM</I></TD></TR></TABLE>>];\n  }\n  subgraph cluster_6 {\n      label=\"Umlaut standardization\";\n      bgcolor=\"#ecf0f1\";\n      fontname=\"Helvetica\"\n      node_6_1 [label = <<TABLE BGCOLOR=\"white\" BORDER=\"0\" CELLBORDER=\"1\" CELLSPACING=\"0\"><TR><TD BGCOLOR=\"#bdc3c7\">Fixing umlaut variations</TD></TR><TR><TD><I>GLÜHLAMPEN -&gt; GLUEHLAMPEN</I></TD></TR></TABLE>>];\n  }\n  // cluster_1\n    node_1_1 -> node_1_2 [];\n  node_1_2 -> node_2_1 [lhead = \"cluster_2\"];\n  // cluster_2\n    node_2_1 -> node_2_2 [];\n    node_2_2 -> node_2_3 [];\n    node_2_3 -> node_2_4 [];\n    node_2_4 -> node_2_5 [];\n    node_2_5 -> node_2_6 [];\n  node_2_6 -> node_3_1 [lhead = \"cluster_3\"];\n  // cluster_3\n    node_3_1 -> node_3_2 [];\n    node_3_2 -> node_3_3 [];\n    node_3_3 -> node_3_4 [];\n    node_3_4 -> node_3_5 [];\n    node_3_5 -> node_3_6 [];\n  node_3_6 -> node_4_1 [lhead = \"cluster_4\"];\n  // cluster_4\n    node_4_1 -> node_4_2 [];\n  node_4_2 -> node_5_1 [lhead = \"cluster_5\"];\n  // cluster_5\n    node_5_1 -> node_5_2 [];\n    node_5_2 -> node_5_3 [];\n  node_5_3 -> node_6_1 [lhead = \"cluster_6\"];\n  // cluster_6\n    \n}"
)
## --------<<  visualize:2 ends here