test: Add tests for positional arguments

Resolves: flyteorg/flyte#5320
Signed-off-by: Chi-Sheng Liu <chishengliu@chishengliu.com>

tests/flytekit/unit/core/test_serialization.py

@@ -943,3 +943,102 @@ def wf_with_input() -> typing.Optional[typing.List[int]]:
     )
 
     assert wf_with_input() == input_val
+
+def test_positional_args_task():
+    arg1 = 5
+    arg2 = 6
+    ret = 11
+
+    @task
+    def t1(x: int, y: int) -> int:
+        return x + y
+
+    @workflow
+    def wf_pure_positional_args() -> int:
+        return t1(arg1, arg2)
+
+    @workflow
+    def wf_mixed_positional_and_keyword_args() -> int:
+        return t1(arg1, y=arg2)
+
+    wf_pure_positional_args_spec = get_serializable(OrderedDict(), serialization_settings, wf_pure_positional_args)
+    wf_mixed_positional_and_keyword_args_spec = get_serializable(OrderedDict(), serialization_settings, wf_mixed_positional_and_keyword_args)
+
+    arg1_binding = Scalar(primitive=Primitive(integer=arg1))
+    arg2_binding = Scalar(primitive=Primitive(integer=arg2))
+    output_type = LiteralType(simple=SimpleType.INTEGER)
+
+    assert wf_pure_positional_args_spec.template.nodes[0].inputs[0].binding.value == arg1_binding
+    assert wf_pure_positional_args_spec.template.nodes[0].inputs[1].binding.value == arg2_binding
+    assert wf_pure_positional_args_spec.template.interface.outputs["o0"].type == output_type
+
+
+    assert wf_mixed_positional_and_keyword_args_spec.template.nodes[0].inputs[0].binding.value == arg1_binding
+    assert wf_mixed_positional_and_keyword_args_spec.template.nodes[0].inputs[1].binding.value == arg2_binding
+    assert wf_mixed_positional_and_keyword_args_spec.template.interface.outputs["o0"].type == output_type
+
+    assert wf_pure_positional_args() == ret
+    assert wf_mixed_positional_and_keyword_args() == ret
+
+def test_positional_args_workflow():
+    arg1 = 5
+    arg2 = 6
+    ret = 11
+
+    @task
+    def t1(x: int, y: int) -> int:
+        return x + y
+
+    @workflow
+    def sub_wf(x: int, y: int) -> int:
+        return t1(x=x, y=y)
+
+    @workflow
+    def wf_pure_positional_args() -> int:
+        return sub_wf(arg1, arg2)
+
+    @workflow
+    def wf_mixed_positional_and_keyword_args() -> int:
+        return sub_wf(arg1, y=arg2)
+
+    wf_pure_positional_args_spec = get_serializable(OrderedDict(), serialization_settings, wf_pure_positional_args)
+    wf_mixed_positional_and_keyword_args_spec = get_serializable(OrderedDict(), serialization_settings, wf_mixed_positional_and_keyword_args)
+
+    arg1_binding = Scalar(primitive=Primitive(integer=arg1))
+    arg2_binding = Scalar(primitive=Primitive(integer=arg2))
+    output_type = LiteralType(simple=SimpleType.INTEGER)
+
+    assert wf_pure_positional_args_spec.template.nodes[0].inputs[0].binding.value == arg1_binding
+    assert wf_pure_positional_args_spec.template.nodes[0].inputs[1].binding.value == arg2_binding
+    assert wf_pure_positional_args_spec.template.interface.outputs["o0"].type == output_type
+
+    assert wf_mixed_positional_and_keyword_args_spec.template.nodes[0].inputs[0].binding.value == arg1_binding
+    assert wf_mixed_positional_and_keyword_args_spec.template.nodes[0].inputs[1].binding.value == arg2_binding
+    assert wf_mixed_positional_and_keyword_args_spec.template.interface.outputs["o0"].type == output_type
+
+    assert wf_pure_positional_args() == ret
+    assert wf_mixed_positional_and_keyword_args() == ret
+
+def test_unexpected_kwargs_task():
+    @task
+    def t1(a: int) -> int:
+        return a
+
+    with pytest.raises(AssertionError, match="Received unexpected keyword argument"):
+        t1(b=6)
+
+def test_too_many_positional_args_task():
+    @task
+    def t1(a: int) -> int:
+        return a
+
+    with pytest.raises(AssertionError, match="Received more arguments than expected"):
+        t1(1, 2)
+
+def test_both_positional_and_keyword_args_task():
+    @task
+    def t1(a: int) -> int:
+        return a
+
+    with pytest.raises(AssertionError, match="Got multiple values for argument"):
+        t1(1, a=2)