diff --git a/src/test/java/com/goxr3plus/streamplayer/stream/StreamPlayerMethodsTest.java b/src/test/java/com/goxr3plus/streamplayer/stream/StreamPlayerMethodsTest.java
new file mode 100644
index 0000000..bca832e
--- /dev/null
+++ b/src/test/java/com/goxr3plus/streamplayer/stream/StreamPlayerMethodsTest.java
@@ -0,0 +1,349 @@
+package com.goxr3plus.streamplayer.stream;
+
+import com.goxr3plus.streamplayer.enums.Status;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import javax.sound.sampled.SourceDataLine;
+import java.io.File;
+import java.util.logging.Logger;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests of all or most of the public methods of StreamPlayer.
+ * These unit tests are written primarily as documentation of the behavior and as example use case,
+ * not as a part of test driven development.
+ */
+public class StreamPlayerMethodsTest {
+
+    StreamPlayer player;
+    private File audioFile;
+
+    @BeforeEach
+    void setup() {
+        final Logger logger = mock(Logger.class);
+        player = new StreamPlayer(logger);
+        audioFile = new File("Logic - Ballin [Bass Boosted].mp3");
+    }
+
+    @Test
+    void balance() throws StreamPlayerException {
+        // Setup
+        final float wantedBalance = 0.5f;
+
+        //Exercise
+        player.open(audioFile);
+        player.play();  // Necessary to be able to set the balance
+
+        final float initialBalance = player.getBalance();
+        player.setBalance(wantedBalance);
+        player.stop();  // Probably not needed, but cleanup is good.
+        final float actualBalance = player.getBalance();  // Can be made before or after stop()
+
+        // Verify
+        assertEquals(0, initialBalance);
+        assertEquals(wantedBalance, actualBalance);
+    }
+
+    @Test
+    void status() throws StreamPlayerException {
+        // Setup
+        final File audioFile = new File("Logic - Ballin [Bass Boosted].mp3");
+
+        // Exercise
+        final Status initialStatus = player.getStatus();
+
+        player.open(audioFile);
+        final Status statusAfterOpen = player.getStatus();
+
+        player.stop();
+        final Status statusAfterFirstStop = player.getStatus();
+
+        player.play();
+        final Status statusAfterPlay = player.getStatus();
+
+        player.pause();
+        final Status statusAfterPause = player.getStatus();
+
+        player.seekTo(40);
+        final Status statusAfterSeeking = player.getStatus();
+
+        player.stop();
+        final Status statusAfterSecondStop = player.getStatus();
+
+        // Verify
+        assertEquals(Status.NOT_SPECIFIED, initialStatus);
+        assertEquals(Status.OPENED, statusAfterOpen);
+        assertEquals(Status.STOPPED, statusAfterFirstStop);
+        assertEquals(Status.PLAYING, statusAfterPlay);
+        assertEquals(Status.PAUSED, statusAfterPause);
+        assertEquals(Status.PAUSED, statusAfterSeeking);  // Still paused (or paused again)
+        assertEquals(Status.STOPPED, statusAfterSecondStop);
+    }
+
+    @Test
+    void gain() throws StreamPlayerException, InterruptedException {
+        // Setup
+        final double gain1 = 0.99;
+        final double gain2 = 0.2;
+        final double delta = 0.05;
+        final boolean listen = false;
+
+        // Exercise
+        final float initialGain = player.getGainValue();
+        player.open(audioFile);
+        player.seekTo(30);
+        player.play();
+        player.setGain(gain1);
+        final float actualGain1First = player.getGainValue();
+        if (listen)    Thread.sleep(2000);
+        final float actualGain1 = player.getGainValue();
+
+        player.setGain(gain2);
+        if (listen)         Thread.sleep(2000);
+        final float actualGain2 = player.getGainValue();
+
+        player.setGain(gain1);
+        if (listen)        Thread.sleep(2000);
+
+        player.stop();
+
+        // Verify
+        assertEquals(0, initialGain);
+        assertEquals(actualGain1First, actualGain1);
+        assertEquals(gain1, actualGain1, delta);  // TODO: Investigate probable bug.
+      //  fail("Test not done");
+    }
+
+    @Test
+    void totalBytes() {
+        player.getTotalBytes();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void stopped() {
+        player.isStopped();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void sourceDataLine() {
+        final SourceDataLine sourceDataLine = player.getSourceDataLine();
+
+        assertNotNull(sourceDataLine);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void playing() {
+        final boolean playing = player.isPlaying();
+
+        assertFalse(playing);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void pausedOrPlaying() {
+        player.isPausedOrPlaying();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void paused() {
+        player.isPaused();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void addStreamPlayerListener_dontAcceptNull() {
+        assertThrows(Exception.class, () -> player.addStreamPlayerListener(null));
+
+        fail("Test not done");
+    }
+
+    @Test
+    void addStreamPlayerListener() {
+        final StreamPlayerListener listener = mock(StreamPlayerListener.class);
+        player.addStreamPlayerListener(listener);
+
+        fail("Test not done");  // TODO: CHeck that the listener is actually added
+    }
+
+    @Test
+    void mute() {
+        player.getMute();
+        player.setMute(false);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void speedFactor() {
+        player.getSpeedFactor();
+        player.setSpeedFactor(1000);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void equalizer() {
+        player.setEqualizer(null, 0);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void play() throws StreamPlayerException {
+        player.play();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void resume() {
+        player.resume();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void pause() {
+        player.pause();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void stop() {
+        player.stop();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void pan() {
+        player.getPan();
+        player.setPan(1000);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void unknown() {
+        player.isUnknown();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void open() throws StreamPlayerException {
+        player.open(null);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void mixers() {
+        player.getMixers();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void seekBytes() throws StreamPlayerException {
+        player.seekBytes(0);
+
+        fail("Test not done");
+    }
+
+
+    // The methods tested below aren't used otherwhere in this project, nor in XR3Player
+
+    @Test
+    void lineBufferSize() {
+        player.getLineBufferSize();
+        player.setLineBufferSize(0);
+        fail("Test not done");
+    }
+
+    @Test
+    void lineCurrentBufferSize() {
+        player.getLineCurrentBufferSize();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void maximumGain() {
+        player.getMaximumGain();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void minimumGain() {
+        player.getMinimumGain();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void positionByte() {
+        player.getPositionByte();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void precision() {
+        player.getPrecision();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void opened() {
+        player.isOpened();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void seeking() {
+        player.isSeeking();
+
+        fail("Test not done");
+    }
+
+    @Test
+    void removeStreamPlayerListener() {
+        player.removeStreamPlayerListener(null);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void seekTo() throws StreamPlayerException {
+        player.seekTo(1000);
+
+        fail("Test not done");
+    }
+
+    @Test
+    void equalizerKey() {
+        player.setEqualizerKey(0, 0);
+
+        fail("Test not done");
+    }
+
+
+}