vbscript: Implement IsDate().

dlls/vbscript/global.c

@@ -935,8 +935,13 @@ static HRESULT Global_VarType(BuiltinDisp *This, VARIANT *arg, unsigned args_cnt
 
 static HRESULT Global_IsDate(BuiltinDisp *This, VARIANT *arg, unsigned args_cnt, VARIANT *res)
 {
-    FIXME("\n");
-    return E_NOTIMPL;
+    TRACE("%s\n", debugstr_variant(arg));
+
+    if(res) {
+        V_VT(res) = VT_BOOL;
+        V_BOOL(res) = V_VT(arg) == VT_DATE ? VARIANT_TRUE : VARIANT_FALSE;
+    }
+    return S_OK;
 }
 
 static HRESULT Global_IsEmpty(BuiltinDisp *This, VARIANT *arg, unsigned args_cnt, VARIANT *res)

dlls/vbscript/tests/api.vbs

@@ -181,6 +181,20 @@ Call ok(not isObject(4), "isObject(4) is true?")
 Call ok(not isObject("x"), "isObject(""x"") is true?")
 Call ok(not isObject(Null), "isObject(Null) is true?")
 
+Call ok(not isDate(new EmptyClass), "isDate(new EmptyClass) is true?")
+Set x = new EmptyClass
+Call ok(not isDate(x), "isDate(x) is true?")
+x = CDate(1)
+Call ok(isDate(x), "isDate(x) is not true?")
+Call ok(isDate(#1/1/2000#), "isDate(#1/1/2000#) is not true?")
+Call ok(not isDate(empty), "isDate(empty) is true?")
+Call ok(not isDate(Nothing), "isDate(Nothing) is true?")
+Call ok(not isDate(true), "isDate(true) is true?")
+Call ok(not isDate(4), "isDate(4) is true?")
+Call ok(not isDate("4"), "isDate(""4"") is true?")
+Call ok(not isDate("x"), "isDate(""x"") is true?")
+Call ok(not isDate(Null), "isDate(Null) is true?")
+
 Call ok(not isEmpty(new EmptyClass), "isEmpty(new EmptyClass) is true?")
 Set x = new EmptyClass
 Call ok(not isEmpty(x), "isEmpty(x) is true?")