added conformance tests

tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts

@@ -0,0 +1,23 @@
+declare class C1 {
+    public x : number;
+}
+
+interface C1 {
+    x : number;
+}
+
+declare class C2 {
+    protected x : number;
+}
+
+interface C2 {
+    x : number;
+}
+
+declare class C3 {
+    private x : number;
+}
+
+interface C3 {
+    x : number;
+}

tests/cases/conformance/classes/classDeclarations/declaredClassMergedwithSelf.ts

@@ -0,0 +1,9 @@
+declare class C1 {}
+
+declare class C1 {}
+
+declare class C2 {}
+
+interface C2 {}
+
+declare class C2 {}

tests/cases/conformance/classes/classDeclarations/mergedClassInterface.ts

@@ -0,0 +1,11 @@
+declare class C1 {}
+
+interface C1 {}
+
+interface C2 {}
+
+declare class C2 {}
+
+interface C2 {}
+
+interface C2 {}