Added tests for the inheritance features

Author: tanay-man

integration_tests/CMakeLists.txt

@@ -841,6 +841,9 @@ RUN(NAME class_01          LABELS cpython llvm llvm_jit)
 RUN(NAME class_02          LABELS cpython llvm llvm_jit)
 RUN(NAME class_03          LABELS cpython llvm llvm_jit)
 RUN(NAME class_04          LABELS cpython llvm llvm_jit)
+RUN(NAME class_05          LABELS cpython llvm llvm_jit)
+RUN(NAME class_06          LABELS cpython llvm llvm_jit)
+
 
 # callback_04 is to test emulation. So just run with cpython
 RUN(NAME callback_04       IMPORT_PATH .. LABELS cpython)

integration_tests/class_05.py

@@ -0,0 +1,37 @@
+from lpython import i32
+
+class Animal:
+    def __init__(self:"Animal"):
+        self.species: str = "Generic Animal"
+        self.age: i32 = 0
+        self.is_domestic: bool = True
+
+class Dog(Animal):
+    def __init__(self:"Dog", name:str, age:i32):
+        super().__init__()
+        self.species: str = "Dog"
+        self.name: str = name
+        self.age: i32 = age
+
+class Cat(Animal):
+    def __init__(self:"Cat", name: str, age: i32):
+        super().__init__()
+        self.species: str = "Cat"
+        self.name:str = name
+        self.age: i32 = age
+
+def main():
+    dog: Dog = Dog("Buddy", 5)
+    cat: Cat = Cat("Whiskers", 3)
+    op1: str = str(dog.name+" is a "+str(dog.age)+"-year-old "+dog.species+".")
+    print(op1)
+    assert op1 == "Buddy is a 5-year-old Dog."
+    print(dog.is_domestic)
+    assert dog.is_domestic == True
+    op2: str = str(cat.name+ " is a "+ str(cat.age)+ "-year-old "+ cat.species+ ".")
+    print(op2)
+    assert op2 == "Whiskers is a 3-year-old Cat."
+    print(cat.is_domestic)
+    assert cat.is_domestic == True
+
+main()

integration_tests/class_06.py

@@ -0,0 +1,36 @@
+from lpython import i32
+
+class Base():
+    def __init__(self:"Base"):
+        self.x : i32 = 10
+
+    def get_x(self:"Base")->i32:
+        print(self.x)
+        return self.x
+    
+#Testing polymorphic fn calls    
+def get_x_static(d: Base)->i32:
+    print(d.x)
+    return d.x
+
+class Derived(Base):
+    def __init__(self: "Derived"):
+        super().__init__()
+        self.y : i32 = 20 
+
+    def get_y(self:"Derived")->i32:
+        print(self.y)
+        return self.y       
+
+
+def main():
+    d : Derived = Derived()
+    x : i32 = get_x_static(d)
+    assert x == 10
+    # Testing parent method call using der obj
+    x = d.get_x()
+    assert x == 10
+    y: i32 = d.get_y()
+    assert y == 20
+
+main()

tests/reference/asr-structs_09-f3ffe08.json

@@ -8,6 +8,6 @@
     "stdout": null,
     "stdout_hash": null,
     "stderr": "asr-structs_09-f3ffe08.stderr",
-    "stderr_hash": "f59ab2d213f6423e0a891e43d5a19e83d4405391b1c7bf481b4b939e",
+    "stderr_hash": "14119a0bc6420ad242b99395d457f2092014d96d2a1ac81d376c649d",
     "returncode": 2
 }

tests/reference/asr-structs_09-f3ffe08.stderr

@@ -1,4 +1,4 @@
-semantic error: read not present in StringIO dataclass
+semantic error: Method not found in the class StringIO or it's parents
   --> tests/errors/structs_09.py:13:23
    |
 13 |     bytes_read: i32 = fd.read()