diff --git a/rtc_base/string_encode_unittest.cc b/rtc_base/string_encode_unittest.cc
index 3dd79c9..4afed3f 100644
--- a/rtc_base/string_encode_unittest.cc
+++ b/rtc_base/string_encode_unittest.cc
@@ -14,6 +14,7 @@
 
 #include <sstream>  // no-presubmit-check TODO(webrtc:8982)
 
+#include "api/array_view.h"
 #include "test/gtest.h"
 
 namespace rtc {
@@ -28,109 +29,106 @@
   }
 
   char data_[10];
+  absl::string_view data_view_{data_, sizeof(data_)};
   char decoded_[11];
   size_t dec_res_;
 };
 
 // Test that we can convert to/from hex with no delimiter.
 TEST_F(HexEncodeTest, TestWithNoDelimiter) {
-  std::string encoded = hex_encode(data_, sizeof(data_));
+  std::string encoded = hex_encode(data_view_);
   EXPECT_EQ("80818283848586878889", encoded);
-  dec_res_ =
-      hex_decode(decoded_, sizeof(decoded_), encoded.data(), encoded.size());
+  dec_res_ = hex_decode(ArrayView<char>(decoded_), encoded);
   ASSERT_EQ(sizeof(data_), dec_res_);
   ASSERT_EQ(0, memcmp(data_, decoded_, dec_res_));
 }
 
 // Test that we can convert to/from hex with a colon delimiter.
 TEST_F(HexEncodeTest, TestWithDelimiter) {
-  std::string encoded = hex_encode_with_delimiter(data_, sizeof(data_), ':');
+  std::string encoded = hex_encode_with_delimiter(data_view_, ':');
   EXPECT_EQ("80:81:82:83:84:85:86:87:88:89", encoded);
-  dec_res_ = hex_decode_with_delimiter(decoded_, sizeof(decoded_),
-                                       encoded.data(), encoded.size(), ':');
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_), encoded, ':');
   ASSERT_EQ(sizeof(data_), dec_res_);
   ASSERT_EQ(0, memcmp(data_, decoded_, dec_res_));
 }
 
 // Test that encoding with one delimiter and decoding with another fails.
 TEST_F(HexEncodeTest, TestWithWrongDelimiter) {
-  std::string encoded = hex_encode_with_delimiter(data_, sizeof(data_), ':');
-  dec_res_ = hex_decode_with_delimiter(decoded_, sizeof(decoded_),
-                                       encoded.data(), encoded.size(), '/');
+  std::string encoded = hex_encode_with_delimiter(data_view_, ':');
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_), encoded, '/');
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that encoding without a delimiter and decoding with one fails.
 TEST_F(HexEncodeTest, TestExpectedDelimiter) {
-  std::string encoded = hex_encode(data_, sizeof(data_));
+  std::string encoded = hex_encode(data_view_);
   EXPECT_EQ(sizeof(data_) * 2, encoded.size());
-  dec_res_ = hex_decode_with_delimiter(decoded_, sizeof(decoded_),
-                                       encoded.data(), encoded.size(), ':');
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_), encoded, ':');
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that encoding with a delimiter and decoding without one fails.
 TEST_F(HexEncodeTest, TestExpectedNoDelimiter) {
-  std::string encoded = hex_encode_with_delimiter(data_, sizeof(data_), ':');
+  std::string encoded = hex_encode_with_delimiter(data_view_, ':');
   EXPECT_EQ(sizeof(data_) * 3 - 1, encoded.size());
-  dec_res_ =
-      hex_decode(decoded_, sizeof(decoded_), encoded.data(), encoded.size());
+  dec_res_ = hex_decode(ArrayView<char>(decoded_), encoded);
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that we handle a zero-length buffer with no delimiter.
 TEST_F(HexEncodeTest, TestZeroLengthNoDelimiter) {
-  std::string encoded = hex_encode("", 0);
+  std::string encoded = hex_encode("");
   EXPECT_TRUE(encoded.empty());
-  dec_res_ =
-      hex_decode(decoded_, sizeof(decoded_), encoded.data(), encoded.size());
+  dec_res_ = hex_decode(ArrayView<char>(decoded_), encoded);
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that we handle a zero-length buffer with a delimiter.
 TEST_F(HexEncodeTest, TestZeroLengthWithDelimiter) {
-  std::string encoded = hex_encode_with_delimiter("", 0, ':');
+  std::string encoded = hex_encode_with_delimiter("", ':');
   EXPECT_TRUE(encoded.empty());
-  dec_res_ = hex_decode_with_delimiter(decoded_, sizeof(decoded_),
-                                       encoded.data(), encoded.size(), ':');
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_), encoded, ':');
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that decoding into a too-small output buffer fails.
 TEST_F(HexEncodeTest, TestDecodeTooShort) {
-  dec_res_ = hex_decode_with_delimiter(decoded_, 4, "0123456789", 10, 0);
+  dec_res_ =
+      hex_decode_with_delimiter(ArrayView<char>(decoded_, 4), "0123456789", 0);
   ASSERT_EQ(0U, dec_res_);
   ASSERT_EQ(0x7f, decoded_[4]);
 }
 
 // Test that decoding non-hex data fails.
 TEST_F(HexEncodeTest, TestDecodeBogusData) {
-  dec_res_ =
-      hex_decode_with_delimiter(decoded_, sizeof(decoded_), "axyz", 4, 0);
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_), "axyz", 0);
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that decoding an odd number of hex characters fails.
 TEST_F(HexEncodeTest, TestDecodeOddHexDigits) {
-  dec_res_ = hex_decode_with_delimiter(decoded_, sizeof(decoded_), "012", 3, 0);
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_), "012", 0);
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that decoding a string with too many delimiters fails.
 TEST_F(HexEncodeTest, TestDecodeWithDelimiterTooManyDelimiters) {
-  dec_res_ = hex_decode_with_delimiter(decoded_, 4, "01::23::45::67", 14, ':');
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_, 4),
+                                       "01::23::45::67", ':');
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that decoding a string with a leading delimiter fails.
 TEST_F(HexEncodeTest, TestDecodeWithDelimiterLeadingDelimiter) {
-  dec_res_ = hex_decode_with_delimiter(decoded_, 4, ":01:23:45:67", 12, ':');
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_, 4),
+                                       ":01:23:45:67", ':');
   ASSERT_EQ(0U, dec_res_);
 }
 
 // Test that decoding a string with a trailing delimiter fails.
 TEST_F(HexEncodeTest, TestDecodeWithDelimiterTrailingDelimiter) {
-  dec_res_ = hex_decode_with_delimiter(decoded_, 4, "01:23:45:67:", 12, ':');
+  dec_res_ = hex_decode_with_delimiter(ArrayView<char>(decoded_, 4),
+                                       "01:23:45:67:", ':');
   ASSERT_EQ(0U, dec_res_);
 }