1 files changed, 59 insertions, 0 deletions
diff --git a/Q1.tests/Pipeline/AssemblerTests.cs b/Q1.tests/Pipeline/AssemblerTests.cs
new file mode 100644
index 0000000..4eb36bb
--- /dev/null
+++ b/Q1.tests/Pipeline/AssemblerTests.cs
@@ -0,0 +1,59 @@
+namespace Q1.tests.Pipeline;
+
+using core.Arch;
+using core.Arch.Constants;
+using core.Arch.Lookups;
+using core.Pipeline;
+
+[TestFixture]
+public class AssemblerTests
+{
+    private Assembler CreateAssembler()
+    {
+        return new Assembler();
+    }
+    
+    private byte[] Assemble(string source)
+    {
+        var assembler = this.CreateAssembler();
+        var reader = new StringReader(source);
+        return assembler.Assemble(reader).ToArray();
+    }
+    
+    [Test]
+    public void Assembler_ShouldAssembleSimpleProgram()
+    {
+        // Arrange
+        string source = """
+                        mov 0x1234, ax
+                        """;
+        
+        // Act
+        var result = Assemble(source);
+        
+        // Assert
+        MemoryStream expected = new MemoryStream();
+        WriteWord(expected, InstructionEncoding.Encode(
+            InstructionSet.GetOpcode("MOV"),
+            AddressingModes.GetAddressingMode("Immediate"),
+            AddressingModes.GetAddressingMode("Register"),
+            true));
+        WriteWord(expected, 0x1234);
+        WriteByte(expected, ChipRegisters.AX);
+        
+        Assert.That(result, Is.EqualTo(expected.ToArray()));
+    }
+    
+    private void WriteByte(MemoryStream stream, byte value)
+    {
+        stream.WriteByte(value);
+    }
+    
+    private void WriteWord(MemoryStream stream, ushort value)
+    {
+        u8 high = (u8) (value       & 0xFF);
+        u8 low = (u8) ((value >> 8) & 0xFF);
+        stream.WriteByte(low);
+        stream.WriteByte(high);
+    }
+}
+\ No newline at end of file