Cargoify servo

components/script/dom/bindings/codegen/parser/tests/test_interface.py

@@ -0,0 +1,188 @@
+import WebIDL
+
+def WebIDLTest(parser, harness):
+    parser.parse("interface Foo { };")
+    results = parser.finish()
+    harness.ok(True, "Empty interface parsed without error.")
+    harness.check(len(results), 1, "Should be one production")
+    harness.ok(isinstance(results[0], WebIDL.IDLInterface),
+               "Should be an IDLInterface")
+    iface = results[0]
+    harness.check(iface.identifier.QName(), "::Foo", "Interface has the right QName")
+    harness.check(iface.identifier.name, "Foo", "Interface has the right name")
+    harness.check(iface.parent, None, "Interface has no parent")
+
+    parser.parse("interface Bar : Foo { };")
+    results = parser.finish()
+    harness.ok(True, "Empty interface parsed without error.")
+    harness.check(len(results), 2, "Should be two productions")
+    harness.ok(isinstance(results[1], WebIDL.IDLInterface),
+               "Should be an IDLInterface")
+    iface = results[1]
+    harness.check(iface.identifier.QName(), "::Bar", "Interface has the right QName")
+    harness.check(iface.identifier.name, "Bar", "Interface has the right name")
+    harness.ok(isinstance(iface.parent, WebIDL.IDLInterface),
+               "Interface has a parent")
+
+    parser = parser.reset()
+    parser.parse("""
+        interface QNameBase {
+          attribute long foo;
+        };
+
+        interface QNameDerived : QNameBase {
+          attribute long long foo;
+          attribute byte bar;          
+        };
+    """)
+    results = parser.finish()
+    harness.check(len(results), 2, "Should be two productions")
+    harness.ok(isinstance(results[0], WebIDL.IDLInterface),
+               "Should be an IDLInterface")
+    harness.ok(isinstance(results[1], WebIDL.IDLInterface),
+               "Should be an IDLInterface")
+    harness.check(results[1].parent, results[0], "Inheritance chain is right")
+    harness.check(len(results[0].members), 1, "Expect 1 productions")
+    harness.check(len(results[1].members), 2, "Expect 2 productions")
+    base = results[0]
+    derived = results[1]
+    harness.check(base.members[0].identifier.QName(), "::QNameBase::foo",
+                  "Member has the right QName")
+    harness.check(derived.members[0].identifier.QName(), "::QNameDerived::foo",
+                  "Member has the right QName")
+    harness.check(derived.members[1].identifier.QName(), "::QNameDerived::bar",
+                  "Member has the right QName")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A : B {};
+            interface B : A {};
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow cycles in interface inheritance chains")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A : C {};
+            interface C : B {};
+            interface B : A {};
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow indirect cycles in interface inheritance chains")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A {};
+            interface B {};
+            A implements B;
+            B implements A;
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow cycles via implements")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A {};
+            interface C {};
+            interface B {};
+            A implements C;
+            C implements B;
+            B implements A;
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow indirect cycles via implements")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A : B {};
+            interface B {};
+            B implements A;
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow inheriting from an interface that implements us")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A : B {};
+            interface B {};
+            interface C {};
+            B implements C;
+            C implements A;
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow inheriting from an interface that indirectly implements us")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A : B {};
+            interface B : C {};
+            interface C {};
+            C implements A;
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow indirectly inheriting from an interface that implements us")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A : B {};
+            interface B : C {};
+            interface C {};
+            interface D {};
+            C implements D;
+            D implements A;
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow indirectly inheriting from an interface that indirectly implements us")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+            interface A;
+            interface B : A {};
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should not allow inheriting from an interface that is only forward declared")