Added a missing test for != ne condition (flyteorg#443)

* Added a missing test for != `ne` condition

Signed-off-by: Ketan Umare <[email protected]>

* improved the test to use previous task output

Signed-off-by: Ketan Umare <[email protected]>

tests/flytekit/unit/core/test_type_hints.py

@@ -461,6 +461,7 @@ def print_expr(expr):
     print_expr(((px == py) & (px < py)) | (px > py))
     print_expr(px < 5)
     print_expr(px >= 5)
+    print_expr(px != 5)
 
 
 def test_comparison_lits():
@@ -478,6 +479,8 @@ def eval_expr(expr, expected: bool):
     eval_expr(px < 5, False)
     eval_expr(px >= 5, True)
     eval_expr(py >= 5, True)
+    eval_expr(py != 5, True)
+    eval_expr(px != 5, False)
 
 
 def test_wf1_branches():
@@ -511,6 +514,27 @@ def my_wf(a: int, b: str) -> (int, str):
     assert x == (4, "It is hello")
 
 
+def test_wf1_branches_ne():
+    @task
+    def t1(a: int) -> int:
+        return a + 1
+
+    @task
+    def t2(a: str) -> str:
+        return a
+
+    @workflow
+    def my_wf(a: int, b: str) -> str:
+        new_a = t1(a=a)
+        return conditional("test1").if_(new_a != 5).then(t2(a=b)).else_().fail("Unable to choose branch")
+
+    with pytest.raises(ValueError):
+        my_wf(a=4, b="hello")
+
+    x = my_wf(a=5, b="hello")
+    assert x == "hello"
+
+
 def test_wf1_branches_no_else():
     with pytest.raises(NotImplementedError):