test: Add precondition checks for two pass builder

Author: Euklios

src/test/java/net/bramp/ffmpeg/builder/FFmpegBuilderTwoPassTest.java

@@ -0,0 +1,91 @@
+package net.bramp.ffmpeg.builder;
+
+import com.google.common.collect.ImmutableList;
+import org.junit.Test;
+
+import java.util.List;
+
+import static net.bramp.ffmpeg.builder.AbstractFFmpegStreamBuilder.DEVNULL;
+import static org.hamcrest.core.Is.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+public class FFmpegBuilderTwoPassTest {
+
+    @Test
+    public void firstPass() {
+        List<String> command = new FFmpegBuilder()
+                .addInput("input.mp4")
+                .done()
+                .addOutput("output.mp4")
+                .setVideoBitRate(1_000_000)
+                .setFormat("mp4")
+                .done()
+                .setPass(1)
+                .build();
+
+        assertThat(command, is(ImmutableList.of("-y", "-v", "error", "-an", "-i", "input.mp4", "-pass", "1", "-f", "mp4", "-b:v", "1000000", "-an", DEVNULL)));
+    }
+
+    @Test
+    public void secondPass() {
+        List<String> command = new FFmpegBuilder()
+                .addInput("input.mp4")
+                .done()
+                .addOutput("output.mp4")
+                .setVideoBitRate(1_000_000)
+                .setFormat("mp4")
+                .done()
+                .setPass(2)
+                .build();
+
+        assertThat(command, is(ImmutableList.of("-y", "-v", "error", "-i", "input.mp4", "-pass", "2", "-f", "mp4", "-b:v", "1000000", "output.mp4")));
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void firstPassNoBitrate() {
+        List<String> ignored = new FFmpegBuilder()
+                .addInput("input.mp4")
+                .done()
+                .addOutput("output.mp4")
+                .setFormat("mp4")
+                .done()
+                .setPass(1)
+                .build();
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void secondPassNoBitrate() {
+        List<String> ignored = new FFmpegBuilder()
+                .addInput("input.mp4")
+                .done()
+                .addOutput("output.mp4")
+                .setFormat("mp4")
+                .done()
+                .setPass(2)
+                .build();
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void firstPassNoFormat() {
+        List<String> ignored = new FFmpegBuilder()
+                .addInput("input.mp4")
+                .done()
+                .addOutput("output.mp4")
+                .setVideoBitRate(1_000_000)
+                .done()
+                .setPass(1)
+                .build();
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void secondPassNoFormat() {
+        List<String> ignored = new FFmpegBuilder()
+                .addInput("input.mp4")
+                .done()
+                .addOutput("output.mp4")
+                .setVideoBitRate(1_000_000)
+                .done()
+                .setPass(2)
+                .build();
+    }
+}