1 files changed, 52 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webrtc/RTCRtpCapabilities-helper.js b/testing/web-platform/tests/webrtc/RTCRtpCapabilities-helper.js
new file mode 100644
index 0000000000..fb297c35fb
--- /dev/null
+++ b/testing/web-platform/tests/webrtc/RTCRtpCapabilities-helper.js
@@ -0,0 +1,52 @@
+'use strict'
+
+// Test is based on the following editor draft:
+// https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.html
+
+// This file depends on dictionary-helper.js which should
+// be loaded from the main HTML file.
+
+/*
+  5.2.  RTCRtpSender Interface
+    dictionary RTCRtpCapabilities {
+      sequence<RTCRtpCodecCapability>           codecs;
+      sequence<RTCRtpHeaderExtensionCapability> headerExtensions;
+    };
+
+    dictionary RTCRtpCodecCapability {
+      DOMString      mimeType;
+      unsigned long  clockRate;
+      unsigned short channels;
+      DOMString      sdpFmtpLine;
+    };
+
+    dictionary RTCRtpHeaderExtensionCapability {
+      DOMString uri;
+    };
+ */
+
+function validateRtpCapabilities(capabilities) {
+  assert_array_field(capabilities, 'codecs');
+  for(const codec of capabilities.codecs) {
+    validateCodecCapability(codec);
+  }
+
+  assert_greater_than(capabilities.codecs.length, 0,
+    'Expect at least one codec capability available');
+
+  assert_array_field(capabilities, 'headerExtensions');
+  for(const headerExt of capabilities.headerExtensions) {
+    validateHeaderExtensionCapability(headerExt);
+  }
+}
+
+function validateCodecCapability(codec) {
+  assert_optional_string_field(codec, 'mimeType');
+  assert_optional_unsigned_int_field(codec, 'clockRate');
+  assert_optional_unsigned_int_field(codec, 'channels');
+  assert_optional_string_field(codec, 'sdpFmtpLine');
+}
+
+function validateHeaderExtensionCapability(headerExt) {
+  assert_optional_string_field(headerExt, 'uri');
+}