Implement data structures from X.680, X.501, X.509, and PKCS#10, with X.690 encoding / decoding support

The implementation took four days, and it is still a little bit rough. Updated version should arrive soon.

Signed-off-by: Yuuta Liang <yuutaw@students.cs.ubc.ca>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/test/model/asn1/NullTest.java b/src/test/model/asn1/NullTest.java
new file mode 100644
index 0000000..4ec2c64
--- /dev/null
+++ b/src/test/model/asn1/NullTest.java
@@ -0,0 +1,38 @@
+package model.asn1;
+
+import model.asn1.exceptions.ParseException;
+import model.asn1.parsing.BytesReader;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class NullTest {
+    @Test
+    void testConstructor() {
+        assertEquals(Null.TAG, new Null(Null.TAG, null).getTag());
+        assertEquals(0x01,
+                new Null(Null.TAG, new Tag(TagClass.CONTEXT_SPECIFIC, true, 0x01)).getParentTag().getNumber());
+    }
+
+    @Test
+    void testEncode() {
+        assertEquals(0, new Null(Null.TAG, null).encodeValueDER().length);
+        assertArrayEquals(new Byte[] {
+                0x5, 0x0 // Tag - Length
+        }, new Null(Null.TAG, null).encodeDER());
+    }
+
+    @Test
+    void testParse() throws ParseException {
+        new Null(new BytesReader(new Byte[]{ 0x5, 0x0 }), false);
+        new Null(new BytesReader(new Byte[]{ -95, 2, 0x5, 0x0 }), true);
+    }
+
+    @Test
+    void testParseFail() {
+        assertThrows(ParseException.class, () ->
+                new Null(new BytesReader(new Byte[]{ 0x5, 0x2 }), false));
+        assertThrows(ParseException.class, () ->
+                new Null(new BytesReader(new Byte[]{ 0x5, 0x2, 1, 1 }), false));
+    }
+}