diff --git a/unit_tests/test_component_instance.py b/unit_tests/test_component_instance.py
new file mode 100644
index 000000000..aca69fe62
--- /dev/null
+++ b/unit_tests/test_component_instance.py
@@ -0,0 +1,349 @@
+import sys
+from io import StringIO
+
+sys.path.append(
+    "src/converter/schematic_converters/lib/PythonLib"
+)
+
+from component_instance import ComponentInstance
+
+
+def test_component_instance_basic_properties():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    assert comp.type_ == "RES"
+    assert comp.x == 100
+    assert comp.y == 200
+    assert comp.orient == "h"
+
+def test_component_instance_default_pkgref():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    assert comp.attrs[0].name == "PKGREF"
+    assert comp.attrs[0].value == "RES"
+
+def test_component_instance_default_value():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    assert comp.attrs[1].value == "RES"
+
+def test_component_instance_pkgref_attribute():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    assert comp.attrs[0].name == "PKGREF"
+    assert comp.attrs[0].value == "R1"
+
+def test_component_instance_value_attribute():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    assert comp.attrs[1].name == "VALUE"
+    assert comp.attrs[1].value == "100"
+
+def test_component_instance_dc_attribute():
+    stream = StringIO(
+        "c 1 VDC 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 DC=5\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    assert comp.attrs[1].name == "DC"
+    assert comp.attrs[1].value == "5"
+
+def test_component_instance_gain_attribute():
+    stream = StringIO(
+        "c 1 AMP 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 GAIN=10\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    assert comp.attrs[1].name == "GAIN"
+    assert comp.attrs[1].value == "10"
+
+def test_component_instance_print_contains_component_block():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "$Comp" in result
+    assert "$EndComp" in result
+
+def test_component_instance_print_component_name():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "L RES R1" in result
+
+def test_component_instance_print_coordinates():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "P 100 200" in result
+
+def test_component_instance_print_horizontal_orientation():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "1    0    0    -1" in result
+
+def test_component_instance_print_vertical_orientation():
+    stream = StringIO(
+        "c 1 RES 10 20 v\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "0    -1    -1    0" in result
+
+def test_component_instance_print_H_orientation():
+    stream = StringIO(
+        "c 1 RES 10 20 H\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "-1    0    0    -1" in result
+
+def test_component_instance_print_V_orientation():
+    stream = StringIO(
+        "c 1 RES 10 20 V\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "0    1    -1    0" in result
+
+def test_component_instance_print_u_orientation():
+    stream = StringIO(
+        "c 1 RES 10 20 u\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "-1    0    0    1" in result
+
+
+def test_component_instance_print_U_orientation():
+    stream = StringIO(
+        "c 1 RES 10 20 U\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "1    0    0    1" in result
+
+
+def test_component_instance_print_d_orientation():
+    stream = StringIO(
+        "c 1 RES 10 20 d\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "0    1    1    0" in result
+
+
+def test_component_instance_print_D_orientation():
+    stream = StringIO(
+        "c 1 RES 10 20 D\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "0    -1    1    0" in result
+
+def test_component_instance_print_field_headers():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "F 0" in result
+    assert "F 1" in result
+
+def test_component_instance_print_reference_and_value():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert '"R1"' in result
+    assert '"100"' in result
+
+def test_component_instance_print_unit_line():
+    stream = StringIO(
+        "c 1 RES 10 20 h\n"
+        "a 0 s 11 0 10 34 hln 100 PKGREF=R1\n"
+        "a 0 s 11 0 10 34 hln 100 VALUE=100\n"
+        "@\n"
+    )
+
+    comp = ComponentInstance(stream)
+
+    output = StringIO()
+
+    comp.print(output)
+
+    result = output.getvalue()
+
+    assert "U 1 1" in result
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