1 files changed, 67 insertions, 0 deletions
diff --git a/test/-ext-/bignum/test_export.rb b/test/-ext-/bignum/test_export.rb
new file mode 100644
index 0000000000..3c1fc2e5e7
--- /dev/null
+++ b/test/-ext-/bignum/test_export.rb
@@ -0,0 +1,67 @@
+# coding: ASCII-8BIT
+
+require 'test/unit'
+require "-test-/bignum"
+
+class TestBignum < Test::Unit::TestCase
+  class TestExport < Test::Unit::TestCase
+    def test_export_zero
+      assert_equal([0, "", 0], 0.test_export(nil, 1, 1, 1, 0))
+    end
+
+    def test_argument_check
+      assert_raise(ArgumentError) { 0.test_export(nil, 0, 1, 1, 0) }
+      assert_raise(ArgumentError) { 0.test_export(nil, 1, 1, 2, 0) }
+      assert_raise(ArgumentError) { 0.test_export(nil, 1, 0, 1, 0) }
+      assert_raise(ArgumentError) { 0.test_export(nil, 1, 1, 1, 8) }
+
+      # assume sizeof(ssize_t) == sizeof(intptr_t)
+      assert_raise(ArgumentError) { 0.test_export(nil, 1, 1 << ([""].pack("p").length * 8 - 1), 1, 0) }
+    end
+
+    def test_export_wordsize
+      assert_equal([1, "\x01", 1], 1.test_export(nil, 1, 1, 1, 0))
+      assert_equal([1, "\x00\x01", 1], 1.test_export(nil, 1, 2, 1, 0))
+      assert_equal([1, "\x00\x00\x01", 1], 1.test_export(nil, 1, 3, 1, 0))
+      assert_equal([1, "\x01", 1], 1.test_export(nil, 1, 1, -1, 0))
+      assert_equal([1, "\x01\x00", 1], 1.test_export(nil, 1, 2, -1, 0))
+      assert_equal([1, "\x01\x00\x00", 1], 1.test_export(nil, 1, 3, -1, 0))
+    end
+
+    def test_export_fixed_buffer
+      assert_equal([0, "\x00\x00", 2], 0.test_export("xx", 1, 1, 1, 0))
+      assert_equal([1, "\x00\x01", 2], 0x01.test_export("xx", 1, 1, 1, 0))
+      assert_equal([1, "\x02\x01", 2], 0x0201.test_export("xx", 1, 1, 1, 0))
+      assert_equal([2, "\x02\x01", 2], 0x030201.test_export("xx", 1, 1, 1, 0))
+      assert_equal([2, "\x02\x01", 2], 0x04030201.test_export("xx", 1, 1, 1, 0))
+      assert_equal([0, "\x00\x00", 2], 0.test_export("xx", -1, 1, 1, 0))
+      assert_equal([1, "\x01\x00", 2], 0x01.test_export("xx", -1, 1, 1, 0))
+      assert_equal([1, "\x01\x02", 2], 0x0201.test_export("xx", -1, 1, 1, 0))
+      assert_equal([2, "\x01\x02", 2], 0x030201.test_export("xx", -1, 1, 1, 0))
+      assert_equal([2, "\x01\x02", 2], 0x04030201.test_export("xx", -1, 1, 1, 0))
+    end
+
+    def test_export_wordorder_and_endian
+      assert_equal([1, "\x12\x34\x56\x78", 2], 0x12345678.test_export(nil, 1, 2, 1, 0))
+      assert_equal([1, "\x34\x12\x78\x56", 2], 0x12345678.test_export(nil, 1, 2, -1, 0))
+      assert_equal([1, "\x56\x78\x12\x34", 2], 0x12345678.test_export(nil, -1, 2, 1, 0))
+      assert_equal([1, "\x78\x56\x34\x12", 2], 0x12345678.test_export(nil, -1, 2, -1, 0))
+    end
+
+    def test_export_native_endian
+      assert_equal([1, [0x1234].pack("S!"), 1], 0x1234.test_export(nil, 1, 2, 0, 0))
+    end
+
+    def test_export_nail
+      assert_equal([1, "\x01\x00\x00\x00\x01\x01", 6], 0b100011.test_export(nil, 1, 1, 1, 7))
+      assert_equal([1, "\x01\x02\x03\x04\x05\x06\x07\x08", 8], 0x12345678.test_export(nil, 1, 1, 1, 4))
+      assert_equal([1, "\x00\x12\x00\x34\x00\x56\x00\x78", 4], 0x12345678.test_export(nil, 1, 2, 1, 8))
+    end
+
+    def test_export_sign
+      assert_equal([-1, "\x01", 1], (-1).test_export(nil, 1, 1, 1, 0))
+      assert_equal([-1, "\x80\x70\x60\x50\x40\x30\x20\x10", 8], (-0x8070605040302010).test_export(nil, 1, 1, 1, 0))
+    end
+
+  end
+end