msvcp90/tests: Add cout<< double test.

dlls/msvcp90/tests/ios.c

@@ -1951,6 +1951,46 @@ static void test_ostream_print_ushort(void)
     call_func1(p_basic_stringstream_wchar_vbase_dtor, &wss);
 }
 
+static void test_ostream_print_double(void)
+{
+    static const char double_str[] = "3.14159";
+
+    basic_stringstream_char ss;
+    basic_string_char pstr;
+    const char *str;
+    double val;
+    val = 3.14159;
+
+    call_func1(p_basic_stringstream_char_ctor, &ss);
+    call_func2_ptr_dbl(p_basic_ostream_char_print_double, &ss.base.base2, val);
+    call_func2(p_basic_stringstream_char_str_get, &ss, &pstr);
+    str = call_func1(p_basic_string_char_cstr, &pstr);
+    ok(!strcmp(double_str, str), "str = %s\n", str);
+
+    call_func1(p_basic_string_char_dtor, &pstr);
+    call_func1(p_basic_stringstream_char_vbase_dtor, &ss);
+}
+
+static void test_ostream_wchar_print_double(void)
+{
+    static const wchar_t double_str[] = { '3', '.', '1', '4', '1', '5', '9', 0 };
+
+    basic_stringstream_wchar wss;
+    basic_string_wchar pwstr;
+    const wchar_t *wstr;
+    double val;
+    val = 3.14159;
+
+    call_func1(p_basic_stringstream_wchar_ctor, &wss);
+    call_func2_ptr_dbl(p_basic_ostream_wchar_print_double, &wss.base.base2, val);
+
+    call_func2(p_basic_stringstream_wchar_str_get, &wss, &pwstr);
+    wstr = call_func1(p_basic_string_wchar_cstr, &pwstr);
+
+    ok(!lstrcmpW(double_str, wstr), "wstr = %s\n", wine_dbgstr_w(wstr));
+    call_func1(p_basic_string_wchar_dtor, &pwstr);
+    call_func1(p_basic_stringstream_wchar_vbase_dtor, &wss);
+}
 
 START_TEST(ios)
 {
@@ -1968,6 +2008,8 @@ START_TEST(ios)
     test_istream_tellg();
     test_istream_getline();
     test_ostream_print_ushort();
+    test_ostream_print_double();
+    test_ostream_wchar_print_double();
 
     ok(!invalid_parameter, "invalid_parameter_handler was invoked too many times\n");