Cargoify servo

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

@@ -0,0 +1,150 @@
+def firstArgType(method):
+    return method.signatures()[0][1][0].type
+
+def WebIDLTest(parser, harness):
+    parser.parse("""
+      dictionary Dict {
+      };
+      callback interface Foo {
+      };
+      interface Bar {
+        // Bit of a pain to get things that have dictionary types
+        void passDict(optional Dict arg);
+        void passFoo(Foo arg);
+        void passNullableUnion((object? or DOMString) arg);
+        void passNullable(Foo? arg);
+      };
+    """)
+    results = parser.finish()
+
+    iface = results[2]
+    harness.ok(iface.isInterface(), "Should have interface")
+    dictMethod = iface.members[0]
+    ifaceMethod = iface.members[1]
+    nullableUnionMethod = iface.members[2]
+    nullableIfaceMethod = iface.members[3]
+
+    dictType = firstArgType(dictMethod)
+    ifaceType = firstArgType(ifaceMethod)
+
+    harness.ok(dictType.isDictionary(), "Should have dictionary type");
+    harness.ok(ifaceType.isInterface(), "Should have interface type");
+    harness.ok(ifaceType.isCallbackInterface(), "Should have callback interface type");
+
+    harness.ok(not dictType.isDistinguishableFrom(ifaceType),
+               "Dictionary not distinguishable from callback interface")
+    harness.ok(not ifaceType.isDistinguishableFrom(dictType),
+               "Callback interface not distinguishable from dictionary")
+
+    nullableUnionType = firstArgType(nullableUnionMethod)
+    nullableIfaceType = firstArgType(nullableIfaceMethod)
+
+    harness.ok(nullableUnionType.isUnion(), "Should have union type");
+    harness.ok(nullableIfaceType.isInterface(), "Should have interface type");
+    harness.ok(nullableIfaceType.nullable(), "Should have nullable type");
+
+    harness.ok(not nullableUnionType.isDistinguishableFrom(nullableIfaceType),
+               "Nullable type not distinguishable from union with nullable "
+               "member type")
+    harness.ok(not nullableIfaceType.isDistinguishableFrom(nullableUnionType),
+               "Union with nullable member type not distinguishable from "
+               "nullable type")
+
+    parser = parser.reset()
+    parser.parse("""
+      interface TestIface {
+        void passKid(Kid arg);
+        void passParent(Parent arg);
+        void passGrandparent(Grandparent arg);
+        void passImplemented(Implemented arg);
+        void passImplementedParent(ImplementedParent arg);
+        void passUnrelated1(Unrelated1 arg);
+        void passUnrelated2(Unrelated2 arg);
+        void passArrayBuffer(ArrayBuffer arg);
+        void passArrayBuffer(ArrayBufferView arg);
+      };
+
+      interface Kid : Parent {};
+      interface Parent : Grandparent {};
+      interface Grandparent {};
+      interface Implemented : ImplementedParent {};
+      Parent implements Implemented;
+      interface ImplementedParent {};
+      interface Unrelated1 {};
+      interface Unrelated2 {};
+    """)
+    results = parser.finish()
+
+    iface = results[0]
+    harness.ok(iface.isInterface(), "Should have interface")
+    argTypes = [firstArgType(method) for method in iface.members]
+    unrelatedTypes = [firstArgType(method) for method in iface.members[-3:]]
+
+    for type1 in argTypes:
+        for type2 in argTypes:
+            distinguishable = (type1 is not type2 and
+                               (type1 in unrelatedTypes or
+                                type2 in unrelatedTypes))
+
+            harness.check(type1.isDistinguishableFrom(type2),
+                          distinguishable,
+                          "Type %s should %sbe distinguishable from type %s" %
+                          (type1, "" if distinguishable else "not ", type2))
+            harness.check(type2.isDistinguishableFrom(type1),
+                          distinguishable,
+                          "Type %s should %sbe distinguishable from type %s" %
+                          (type2, "" if distinguishable else "not ", type1))
+
+    parser = parser.reset()
+    parser.parse("""
+      interface Dummy {};
+      interface TestIface {
+        void method(long arg1, TestIface arg2);
+        void method(long arg1, long arg2);
+        void method(long arg1, Dummy arg2);
+        void method(DOMString arg1, DOMString arg2, DOMString arg3);
+      };
+    """)
+    results = parser.finish()
+    harness.check(len(results[1].members), 1,
+                  "Should look like we have one method")
+    harness.check(len(results[1].members[0].signatures()), 4,
+                  "Should have four signatures")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+          interface Dummy {};
+          interface TestIface {
+            void method(long arg1, TestIface arg2);
+            void method(long arg1, long arg2);
+            void method(any arg1,  Dummy arg2);
+            void method(DOMString arg1, DOMString arg2, DOMString arg3);
+          };
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw,
+               "Should throw when args before the distinguishing arg are not "
+               "all the same type")
+
+    parser = parser.reset()
+    threw = False
+    try:
+        parser.parse("""
+          interface Dummy {};
+          interface TestIface {
+            void method(long arg1, TestIface arg2);
+            void method(long arg1, long arg2);
+            void method(any arg1,  DOMString arg2);
+            void method(DOMString arg1, DOMString arg2, DOMString arg3);
+          };
+        """)
+        results = parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should throw when there is no distinguishing index")