From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/test/test_tsort.rb | 113 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 jni/ruby/test/test_tsort.rb

(limited to 'jni/ruby/test/test_tsort.rb')

diff --git a/jni/ruby/test/test_tsort.rb b/jni/ruby/test/test_tsort.rb
new file mode 100644
index 0000000..4a13a6e
--- /dev/null
+++ b/jni/ruby/test/test_tsort.rb
@@ -0,0 +1,113 @@
+require 'tsort'
+require 'test/unit'
+
+class TSortHash < Hash # :nodoc:
+  include TSort
+  alias tsort_each_node each_key
+  def tsort_each_child(node, &block)
+    fetch(node).each(&block)
+  end
+end
+
+class TSortArray < Array # :nodoc:
+  include TSort
+  alias tsort_each_node each_index
+  def tsort_each_child(node, &block)
+    fetch(node).each(&block)
+  end
+end
+
+class TSortTest < Test::Unit::TestCase # :nodoc:
+  def test_dag
+    h = TSortHash[{1=>[2, 3], 2=>[3], 3=>[]}]
+    assert_equal([3, 2, 1], h.tsort)
+    assert_equal([[3], [2], [1]], h.strongly_connected_components)
+  end
+
+  def test_cycle
+    h = TSortHash[{1=>[2], 2=>[3, 4], 3=>[2], 4=>[]}]
+    assert_equal([[4], [2, 3], [1]],
+      h.strongly_connected_components.map {|nodes| nodes.sort})
+    assert_raise(TSort::Cyclic) { h.tsort }
+  end
+
+  def test_array
+    a = TSortArray[[1], [0], [0], [2]]
+    assert_equal([[0, 1], [2], [3]],
+      a.strongly_connected_components.map {|nodes| nodes.sort})
+
+    a = TSortArray[[], [0]]
+    assert_equal([[0], [1]],
+      a.strongly_connected_components.map {|nodes| nodes.sort})
+  end
+
+  def test_s_tsort
+    g = {1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]}
+    each_node = lambda {|&b| g.each_key(&b) }
+    each_child = lambda {|n, &b| g[n].each(&b) }
+    assert_equal([4, 2, 3, 1], TSort.tsort(each_node, each_child))
+    g = {1=>[2], 2=>[3, 4], 3=>[2], 4=>[]}
+    assert_raise(TSort::Cyclic) { TSort.tsort(each_node, each_child) }
+  end
+
+  def test_s_tsort_each
+    g = {1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]}
+    each_node = lambda {|&b| g.each_key(&b) }
+    each_child = lambda {|n, &b| g[n].each(&b) }
+    r = []
+    TSort.tsort_each(each_node, each_child) {|n| r << n }
+    assert_equal([4, 2, 3, 1], r)
+
+    r = TSort.tsort_each(each_node, each_child).map {|n| n.to_s }
+    assert_equal(['4', '2', '3', '1'], r)
+  end
+
+  def test_s_strongly_connected_components
+    g = {1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]}
+    each_node = lambda {|&b| g.each_key(&b) }
+    each_child = lambda {|n, &b| g[n].each(&b) }
+    assert_equal([[4], [2], [3], [1]],
+                 TSort.strongly_connected_components(each_node, each_child))
+    g = {1=>[2], 2=>[3, 4], 3=>[2], 4=>[]}
+    assert_equal([[4], [2, 3], [1]],
+                 TSort.strongly_connected_components(each_node, each_child))
+  end
+
+  def test_s_each_strongly_connected_component
+    g = {1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]}
+    each_node = lambda {|&b| g.each_key(&b) }
+    each_child = lambda {|n, &b| g[n].each(&b) }
+    r = []
+    TSort.each_strongly_connected_component(each_node, each_child) {|scc|
+      r << scc
+    }
+    assert_equal([[4], [2], [3], [1]], r)
+    g = {1=>[2], 2=>[3, 4], 3=>[2], 4=>[]}
+    r = []
+    TSort.each_strongly_connected_component(each_node, each_child) {|scc|
+      r << scc
+    }
+    assert_equal([[4], [2, 3], [1]], r)
+
+    r = TSort.each_strongly_connected_component(each_node, each_child).map {|scc|
+      scc.map(&:to_s)
+    }
+    assert_equal([['4'], ['2', '3'], ['1']], r)
+  end
+
+  def test_s_each_strongly_connected_component_from
+    g = {1=>[2], 2=>[3, 4], 3=>[2], 4=>[]}
+    each_child = lambda {|n, &b| g[n].each(&b) }
+    r = []
+    TSort.each_strongly_connected_component_from(1, each_child) {|scc|
+      r << scc
+    }
+    assert_equal([[4], [2, 3], [1]], r)
+
+    r = TSort.each_strongly_connected_component_from(1, each_child).map {|scc|
+      scc.map(&:to_s)
+    }
+    assert_equal([['4'], ['2', '3'], ['1']], r)
+  end
+end
+
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