Improve testing for WavImporterTest

src/MagnumPlugins/WavAudioImporter/Test/WavImporterTest.cpp

@@ -172,6 +172,11 @@ void WavImporterTest::invalidFactChunk() {
 
     CORRADE_COMPARE(importer.format(), Buffer::Format::Mono16);
     CORRADE_COMPARE(importer.frequency(), 22050);
+
+
+    CORRADE_COMPARE_AS(importer.data().slice(0,4),
+        Containers::Array<char>::from(-27, -11, -1, -9).slice(0,4),
+        TestSuite::Compare::Container);
 }
 
 void WavImporterTest::mono8() {
@@ -180,6 +185,10 @@ void WavImporterTest::mono8() {
 
     CORRADE_COMPARE(importer.format(), Buffer::Format::Mono8);
     CORRADE_COMPARE(importer.frequency(), 22050);
+
+    CORRADE_COMPARE_AS(importer.data().slice(0,4),
+        Containers::Array<char>::from(127, 127, 127, 127).slice(0,4),
+        TestSuite::Compare::Container);
 }
 
 void WavImporterTest::mono8junk() {
@@ -188,6 +197,10 @@ void WavImporterTest::mono8junk() {
 
     CORRADE_COMPARE(importer.format(), Buffer::Format::Mono8);
     CORRADE_COMPARE(importer.frequency(), 22050);
+
+    CORRADE_COMPARE_AS(importer.data().slice(0,4),
+        Containers::Array<char>::from(127, 127, 127, 127).slice(0,4),
+        TestSuite::Compare::Container);
 }
 
 void WavImporterTest::mono8ALaw() {
@@ -196,6 +209,11 @@ void WavImporterTest::mono8ALaw() {
 
     CORRADE_COMPARE(importer.format(), Buffer::Format::MonoALaw);
     CORRADE_COMPARE(importer.frequency(), 8000);
+
+
+    CORRADE_COMPARE_AS(importer.data().slice(0,4),
+        Containers::Array<char>::from(87, 84, 85, 85).slice(0,4),
+        TestSuite::Compare::Container);
 }
 
 void WavImporterTest::mono8MuLaw() {
@@ -204,6 +222,11 @@ void WavImporterTest::mono8MuLaw() {
 
     CORRADE_COMPARE(importer.format(), Buffer::Format::MonoMuLaw);
     CORRADE_COMPARE(importer.frequency(), 8000);
+
+
+    CORRADE_COMPARE_AS(importer.data().slice(0,4),
+        Containers::Array<char>::from(-5, -3, -1, -2).slice(0,4),
+        TestSuite::Compare::Container);
 }
 
 void WavImporterTest::mono16() {
@@ -234,6 +257,11 @@ void WavImporterTest::stereo8ALaw() {
 
     CORRADE_COMPARE(importer.format(), Buffer::Format::StereoALaw);
     CORRADE_COMPARE(importer.frequency(), 8000);
+
+
+    CORRADE_COMPARE_AS(importer.data().slice(0,4),
+        Containers::Array<char>::from(-43, -43, -43, -43).slice(0,4),
+        TestSuite::Compare::Container);
 }
 
 void WavImporterTest::stereo8MuLaw() {
@@ -242,6 +270,11 @@ void WavImporterTest::stereo8MuLaw() {
 
     CORRADE_COMPARE(importer.format(), Buffer::Format::StereoMuLaw);
     CORRADE_COMPARE(importer.frequency(), 8000);
+
+
+    CORRADE_COMPARE_AS(importer.data().slice(0,4),
+        Containers::Array<char>::from(-1, -1, -1, -1).slice(0,4),
+        TestSuite::Compare::Container);
 }
 
 void WavImporterTest::stereo12() {
@@ -260,6 +293,10 @@ void WavImporterTest::stereo16() {
 
     CORRADE_COMPARE(importer.format(), Buffer::Format::Stereo16);
     CORRADE_COMPARE(importer.frequency(), 44100);
+
+    CORRADE_COMPARE_AS(importer.data(),
+        Containers::Array<char>::from(39, 79, 39, 79),
+        TestSuite::Compare::Container);
 }
 
 void WavImporterTest::stereo24() {

src/MagnumPlugins/WavAudioImporter/WavHeader.h

@@ -36,7 +36,9 @@ namespace Magnum { namespace Audio {
 
 /** @brief WAV audio format */
 enum class WavAudioFormat: UnsignedShort {
+    Unknown = 0x0000,       /**< Unknown */
     Pcm = 0x0001,           /**< PCM */
+    Adpcm = 0x0002,         /**< Adaptive Differential PCM */
     IeeeFloat = 0x0003,     /**< IEEE Float */
     ALaw = 0x0006,          /**< A-Law */
     MuLaw = 0x0007,         /**< μ-Law */