C# MockHeaders.First方法代码示例

        public void TryAddWithoutValidation_AddSingleValue_ValueParsed()
        {
            MockHeaders headers = new MockHeaders();
            headers.TryAddWithoutValidation(knownHeader, rawPrefix);

            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());
            Assert.Equal(parsedPrefix, headers.First().Value.First());

            Assert.Equal(1, headers.Parser.TryParseValueCallCount);
        }

        public void TryAddWithoutValidation_AddTwoSingleValues_BothValuesParsed()
        {
            MockHeaders headers = new MockHeaders();
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "1");
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "2");

            Assert.Equal(0, headers.Parser.TryParseValueCallCount);

            Assert.Equal(1, headers.Count());
            Assert.Equal(2, headers.First().Value.Count());

            Assert.Equal(parsedPrefix + "1", headers.First().Value.ElementAt(0));
            Assert.Equal(parsedPrefix + "2", headers.First().Value.ElementAt(1));

            Assert.Equal(2, headers.Parser.TryParseValueCallCount);
        }

        public void TryAddWithoutValidation_AddTwoValidValuesAsOneString_BothValuesParsed()
        {
            MockHeaders headers = new MockHeaders();
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "1," + rawPrefix + "2");

            Assert.Equal(0, headers.Parser.TryParseValueCallCount);

            Assert.Equal(1, headers.Count());
            Assert.Equal(2, headers.First().Value.Count());

            Assert.Equal(parsedPrefix + "1", headers.First().Value.ElementAt(0));
            Assert.Equal(parsedPrefix + "2", headers.First().Value.ElementAt(1));

            // The parser gets called for each value in the raw string. I.e. if we have 1 raw string containing two
            // values, the parser gets called twice.
            Assert.Equal(2, headers.Parser.TryParseValueCallCount);
        }

        public void TryAddWithoutValidation_AddValueContainingNewLine_NewLineFollowedByWhitespaceIsOKButNewLineFollowedByNonWhitespaceIsRejected()
        {
            MockHeaders headers = new MockHeaders();

            // The header parser rejects both of the following values. Both values contain new line chars. According
            // to the RFC, LWS supports newlines followed by whitespaces. I.e. the first value gets rejected by the
            // parser, but added to the list of invalid values.
            headers.TryAddWithoutValidation(knownHeader, invalidHeaderValue + "\r\n other: value"); // OK, LWS is allowed
            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());
            Assert.Equal(invalidHeaderValue + "\r\n other: value", headers.First().Value.First());
            Assert.Equal(1, headers.Parser.TryParseValueCallCount);

            // This value is considered invalid (newline char followed by non-whitepace). However, since
            // TryAddWithoutValidation() only causes the header value to be analyzed when it gets actually accessed, no
            // exception is thrown. Instead the value is discarded and a warning is logged.
            headers.Clear();
            headers.TryAddWithoutValidation(knownHeader, invalidHeaderValue + "\r\nother:value");
            Assert.False(headers.Contains(knownHeader));
            Assert.Equal(0, headers.Count());

            // Adding newline followed by whitespace to a custom header is OK.
            headers.Clear();
            headers.TryAddWithoutValidation("custom", "value\r\n other: value"); // OK, LWS is allowed
            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());
            Assert.Equal("value\r\n other: value", headers.First().Value.First());

            // Adding newline followed by non-whitespace chars is invalid. The value is discarded and a warning is
            // logged.
            headers.Clear();
            headers.TryAddWithoutValidation("custom", "value\r\nother: value");
            Assert.False(headers.Contains("custom"));
            Assert.Equal(0, headers.Count());

            // Also ending a value with newline is invalid. Verify that valid values are added.
            headers.Clear();
            headers.Parser.TryParseValueCallCount = 0;
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "\rvalid");
            headers.TryAddWithoutValidation(knownHeader, invalidHeaderValue + "\r\n");
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "\n," + invalidHeaderValue + "\r\nother");
            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());
            Assert.Equal(parsedPrefix + "\rvalid", headers.First().Value.First());
            Assert.Equal(4, headers.Parser.TryParseValueCallCount);

            headers.Clear();
            headers.TryAddWithoutValidation("custom", "value\r\ninvalid");
            headers.TryAddWithoutValidation("custom", "value\r\n valid");
            headers.TryAddWithoutValidation("custom", "validvalue, invalid\r\nvalue");
            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());
            Assert.Equal("value\r\n valid", headers.First().Value.First());
        }

        public void Add_MultipleAddValidValueThenAddInvalidValuesToNonExistingHeader_ThrowAndDontAddHeader()
        {
            MockHeaders headers = new MockHeaders();

            Assert.Throws<FormatException>(() => { headers.Add(knownHeader, new string[] { rawPrefix + "1", invalidHeaderValue }); });

            // Make sure the header got added due to the valid add. Note that the first value in the array
            // is valid, so it gets added.
            Assert.True(headers.Contains(knownHeader), "Header was not added even though we added 1 valid value.");
            Assert.Equal(1, headers.First().Value.Count());
            Assert.Equal(parsedPrefix + "1", headers.First().Value.ElementAt(0));
        }

        public void AddParsedValue_UseDifferentAddMethods_AllValuesAddedCorrectly()
        {
            MockHeaders headers = new MockHeaders();
            headers.Add(knownHeader, rawPrefix + "1");
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "2");

            Assert.Equal(1, headers.Parser.TryParseValueCallCount);

            headers.AddParsedValue(knownHeader, parsedPrefix + "3");

            // Adding a parsed value, will trigger all raw values to be parsed.
            Assert.Equal(2, headers.Parser.TryParseValueCallCount);

            Assert.Equal(3, headers.GetValues(knownHeader).Count());
            Assert.Equal(parsedPrefix + "1", headers.First().Value.ElementAt(0));
            Assert.Equal(parsedPrefix + "2", headers.First().Value.ElementAt(1));
            Assert.Equal(parsedPrefix + "3", headers.First().Value.ElementAt(2));
        }

        public void TryAddWithoutValidation_AddTwoValuesOneValidOneInvalidAsOneString_RawStringAddedAsInvalid()
        {
            MockHeaders headers = new MockHeaders();
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "1," + invalidHeaderValue);

            Assert.Equal(0, headers.Parser.TryParseValueCallCount);

            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());

            // We expect the value to be returned without change since it couldn't be parsed in its entirety.
            Assert.Equal(rawPrefix + "1," + invalidHeaderValue, headers.First().Value.ElementAt(0));

            // The parser gets called twice, but the second time it returns false, because it tries to parse
            // 'invalidHeaderValue'.
            Assert.Equal(2, headers.Parser.TryParseValueCallCount);
        }

        public void Add_SingleAddCustomHeaderWithNullValue_HeaderIsAddedWithEmptyStringValue()
        {
            MockHeaders headers = new MockHeaders();
            headers.Add(customHeader, (string)null);

            Assert.Equal(0, headers.Parser.TryParseValueCallCount);

            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());

            Assert.Equal(string.Empty, headers.First().Value.ElementAt(0));

            // We're using a custom header. No parsing should be triggered.
            Assert.Equal(0, headers.Parser.TryParseValueCallCount);
        }

        public void Add_SingleFirstAddThenTryAddWithoutValidationToSingleValueHeader_BothParsedAndInvalidValue()
        {
            MockHeaderParser parser = new MockHeaderParser(false); // doesn't support multiple values.
            MockHeaders headers = new MockHeaders(parser);
            headers.Add(knownHeader, rawPrefix + "1");
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "2");

            Assert.Equal(1, headers.Parser.TryParseValueCallCount);

            // Add() succeeds since we don't have a value added yet. TryAddWithoutValidation() also succeeds, however
            // the value is added to the 'invalid values' list when retrieved.
            Assert.Equal(1, headers.Count());
            Assert.Equal(2, headers.First().Value.Count());
            Assert.Equal(parsedPrefix + "1", headers.First().Value.ElementAt(0));
            Assert.Equal(rawPrefix + "2", headers.First().Value.ElementAt(1));

            // Note that TryParseValue() is not called because HttpHeaders sees that there is already a value
            // so it adds the raw value to 'invalid values'.
            Assert.Equal(1, headers.Parser.TryParseValueCallCount);
        }

        public void Add_SingleAddTwoValidValuesToHeaderWithSingleValue_Throw()
        {
            MockHeaderParser parser = new MockHeaderParser(false); // doesn't support multiple values.
            MockHeaders headers = new MockHeaders(parser);

            try
            {
                headers.Add(knownHeader, rawPrefix + "1");
            }
            catch (Exception e)
            {
                Assert.True(false, string.Format("Adding the first header already threw exception: {0}", e));
            }

            Assert.Throws<FormatException>(() => { headers.Add(knownHeader, rawPrefix + "2"); });

            // Verify that the first header value is still there.
            Assert.Equal(1, headers.First().Value.Count());
        }

        public void Add_SingleFirstAddThenTryAddWithoutValidation_TwoParsedValuesAdded()
        {
            MockHeaders headers = new MockHeaders();
            headers.Add(knownHeader, rawPrefix + "1");
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "2");

            // Add() should trigger parsing. Since TryAddWithoutValidation() is called afterwards the second value is
            // not parsed yet.
            Assert.Equal(1, headers.Parser.TryParseValueCallCount);

            Assert.Equal(1, headers.Count());
            Assert.Equal(2, headers.First().Value.Count());

            Assert.Equal(parsedPrefix + "1", headers.First().Value.ElementAt(0));
            Assert.Equal(parsedPrefix + "2", headers.First().Value.ElementAt(1));

            // Value is already parsed. There shouldn't be additional calls to the parser.
            Assert.Equal(2, headers.Parser.TryParseValueCallCount);
        }

        public void TryAddWithoutValidation_AddMultipleValueToSingleValueHeaders_FirstHeaderAddedOthersAreInvalid()
        {
            MockHeaderParser parser = new MockHeaderParser(false); // doesn't support multiple values.
            MockHeaders headers = new MockHeaders(parser);
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "1");
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "2");

            Assert.Equal(0, headers.Parser.TryParseValueCallCount);

            Assert.Equal(1, headers.Count());
            Assert.Equal(2, headers.First().Value.Count());

            // Note that the first value was parsed and added to the 'parsed values' list. The second value however
            // was added to the 'invalid values' list since the header doesn't support multiple values.
            Assert.Equal(parsedPrefix + "1", headers.First().Value.ElementAt(0));
            Assert.Equal(rawPrefix + "2", headers.First().Value.ElementAt(1));

            // The parser is only called once for the first value. HttpHeaders doesn't invoke the parser for
            // additional values if the parser only supports one value.
            Assert.Equal(1, headers.Parser.TryParseValueCallCount);
        }

        public void TryAddWithoutValidation_AddMultipleValueStringToSingleValueHeaders_MultipleValueStringAddedAsInvalid()
        {
            MockHeaderParser parser = new MockHeaderParser(false); // doesn't support multiple values.
            MockHeaders headers = new MockHeaders(parser);
            headers.TryAddWithoutValidation(knownHeader, rawPrefix + "1," + rawPrefix + "2");

            Assert.Equal(0, headers.Parser.TryParseValueCallCount);

            // Since parsing the header value fails because it is composed of 2 values, the original string is added
            // to the list of 'invalid values'. Therefore we only have 1 header value (the original string).
            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());
            Assert.Equal(rawPrefix + "1," + rawPrefix + "2", headers.First().Value.First());

            Assert.Equal(1, headers.Parser.TryParseValueCallCount);
        }

        public void TryAddWithoutValidation_AddNullAndEmptyValuesToUnknownHeader_TwoEmptyStringsAddedAsValues()
        {
            MockHeaders headers = new MockHeaders();
            headers.TryAddWithoutValidation(customHeader, (string)null);
            headers.TryAddWithoutValidation(customHeader, string.Empty);

            Assert.Equal(1, headers.Count());
            Assert.Equal(2, headers.First().Value.Count());

            // TryAddWithoutValidation() adds 'null' as string.empty to distinguish between an empty raw value and no raw
            // value. For custom headers we just add what the user gives us. I.e. the result is a header with two empty
            // values.
            Assert.Equal(string.Empty, headers.First().Value.ElementAt(0));
            Assert.Equal(string.Empty, headers.First().Value.ElementAt(1));
        }

        public void TryAddWithoutValidation_AddValueForUnknownHeader_ValueAddedToStore()
        {
            MockHeaders headers = new MockHeaders();
            headers.TryAddWithoutValidation(customHeader, "custom value");

            Assert.Equal(1, headers.Count());
            Assert.Equal(1, headers.First().Value.Count());

            Assert.Equal("custom value", headers.First().Value.First());

            Assert.Equal(0, headers.Parser.TryParseValueCallCount);
        }