Added some basic tests for the Streams API, using the new CodalAssert style

Author: JohnVidler

source/samples/StreamAPITest.cpp

@@ -0,0 +1,50 @@
+#include "MicroBit.h"
+#include "CodalAssert.h"
+#include "LevelDetector.h"
+#include "LevelDetectorSPL.h"
+#include "Tests.h"
+
+/**
+ * Note - These tests use CodalAssert.h - so require the following codal.json options
+ * be enabled:
+ * CODAL_ENABLE_ASSERT: 1
+ * 
+ * To cause the first assertion failure to halt the processor, also include:
+ * CODAL_ASSERT_PANIC: 1
+ */
+
+extern MicroBit uBit;
+
+/**
+ * Tests if the mic auto activation (and ADC activation) works correctly
+ */
+void stream_test_mic_activate() {
+    assert( uBit.audio.isMicrophoneEnabled() == false, "Microphone was enabled on startup?" );
+    assert( uBit.audio.mic->output.isFlowing() == false, "isFlowing() should be false on startup." );
+    int level = uBit.audio.levelSPL->getValue();
+    assert( uBit.audio.isMicrophoneEnabled(), "getValue() failed to turn the MIC on!" );
+    assert( uBit.audio.mic->output.isFlowing(), "isFlowing() was not true after mic activation" );
+    assert( level > 0, "Detected level appears to be zero? Defective hardware?" );
+    assert_pass( NULL );
+}
+
+void stream_test_getValue_interval() {
+    uBit.audio.levelSPL->getValue(); // Wake the stream :)
+    for( int i=0; i<10; i++ ) {
+        assert( uBit.audio.isMicrophoneEnabled(), "Microphone should still be active" );
+        assert( uBit.audio.mic->output.isFlowing(), "isFlowing() should still be true" );
+        int level = uBit.audio.levelSPL->getValue();
+        assert( level > 0, "Detected level appears to be zero? Defective hardware?" );
+        uBit.sleep( CODAL_STREAM_IDLE_TIMEOUT_MS / 2 );
+    }
+    uBit.sleep( CODAL_STREAM_IDLE_TIMEOUT_MS * 2 ); // Ensure we go quiscient
+    assert( uBit.audio.isMicrophoneEnabled() == false, "Microphone should be shut down after 2 * CODAL_STREAM_IDLE_TIMEOUT_MS" );
+    assert( uBit.audio.mic->output.isFlowing() == false, "isFlowing() should be false after 2 * CODAL_STREAM_IDLE_TIMEOUT_MS" );
+    assert_pass( NULL );
+}
+
+void stream_test_all() {
+    stream_test_mic_activate();
+    stream_test_getValue_interval();
+    assert_pass( NULL );
+}

source/samples/Tests.h

@@ -100,5 +100,8 @@ void init_clap_detect();
 void ble_test();
 void deepsleep_test( int test);
 void neopixel_test();
+void stream_test_mic_activate();
+void stream_test_getValue_interval();
+void stream_test_all();
 
 #endif