chore: Add unit test for view-generator service

hypertrace-view-generator/hypertrace-view-generator/src/test/java/org/hypertrace/viewgenerator/generators/RawTraceViewGeneratorTest.java

@@ -0,0 +1,44 @@
+package org.hypertrace.viewgenerator.generators;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.util.List;
+import org.apache.avro.file.DataFileReader;
+import org.apache.avro.specific.SpecificDatumReader;
+import org.hypertrace.core.datamodel.StructuredTrace;
+import org.hypertrace.viewgenerator.api.RawTraceView;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class RawTraceViewGeneratorTest {
+  private RawTraceViewGenerator rawTraceViewGenerator;
+
+  @BeforeEach
+  public void setup() {
+    rawTraceViewGenerator = new RawTraceViewGenerator();
+  }
+
+  @Test
+  public void testGenerateView_SampleHotrodTrace() throws IOException {
+    RawTraceViewGenerator rawTraceViewGenerator = new RawTraceViewGenerator();
+    List<RawTraceView> rawTraceViews = rawTraceViewGenerator.process(createSampleTrace());
+    assertEquals(1, rawTraceViews.size());
+    assertEquals(4, rawTraceViews.get(0).getNumServices());
+    assertEquals(50, rawTraceViews.get(0).getNumSpans());
+  }
+
+  private static StructuredTrace createSampleTrace() throws IOException {
+    URL resource =
+        Thread.currentThread().getContextClassLoader().getResource("StructuredTrace-Hotrod.avro");
+    SpecificDatumReader<StructuredTrace> datumReader =
+        new SpecificDatumReader<>(StructuredTrace.getClassSchema());
+    DataFileReader<StructuredTrace> dfrStructuredTrace =
+        new DataFileReader<>(new File(resource.getPath()), datumReader);
+    StructuredTrace trace = dfrStructuredTrace.next();
+    dfrStructuredTrace.close();
+    return trace;
+  }
+}