Implement is_modified telemetry tag

Author: nikita-tkachenko-datadog

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/config/ExecutionSettingsFactoryImpl.java

@@ -304,8 +304,8 @@ private Diff getPullRequestDiff(boolean impactedTestsDetectionEnabled) {
     if (repositoryRoot == null || !impactedTestsDetectionEnabled) {
       return Diff.EMPTY;
     }
-    // FIXME nikita: add telemetry
-    // FIXME nikita: add file-based granularity fallback if Git executable is not available?
+    // FIXME nikita: add file-based granularity fallback if Git executable is not available (add
+    // telemetry for backend)?
     // FIXME nikita: add integration/smoke tests
     try {
       GitClient gitClient = gitClientFactory.create(repositoryRoot);

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/domain/TestImpl.java

@@ -18,6 +18,7 @@
 import datadog.trace.api.civisibility.telemetry.CiVisibilityMetricCollector;
 import datadog.trace.api.civisibility.telemetry.tag.BrowserDriver;
 import datadog.trace.api.civisibility.telemetry.tag.EventType;
+import datadog.trace.api.civisibility.telemetry.tag.IsModified;
 import datadog.trace.api.civisibility.telemetry.tag.IsNew;
 import datadog.trace.api.civisibility.telemetry.tag.IsRetry;
 import datadog.trace.api.civisibility.telemetry.tag.IsRum;
@@ -262,6 +263,7 @@ public void end(@Nullable Long endTime) {
         instrumentation,
         EventType.TEST,
         span.getTag(Tags.TEST_IS_NEW) != null ? IsNew.TRUE : null,
+        span.getTag(Tags.TEST_IS_MODIFIED) != null ? IsModified.TRUE : null,
         span.getTag(Tags.TEST_IS_RETRY) != null ? IsRetry.TRUE : null,
         span.getTag(Tags.TEST_IS_RUM_ACTIVE) != null ? IsRum.TRUE : null,
         CIConstants.SELENIUM_BROWSER_DRIVER.equals(span.getTag(Tags.TEST_BROWSER_DRIVER))

internal-api/src/main/java/datadog/trace/api/civisibility/telemetry/CiVisibilityCountMetric.java

@@ -17,6 +17,7 @@
 import datadog.trace.api.civisibility.telemetry.tag.HasCodeowner;
 import datadog.trace.api.civisibility.telemetry.tag.IsBenchmark;
 import datadog.trace.api.civisibility.telemetry.tag.IsHeadless;
+import datadog.trace.api.civisibility.telemetry.tag.IsModified;
 import datadog.trace.api.civisibility.telemetry.tag.IsNew;
 import datadog.trace.api.civisibility.telemetry.tag.IsRetry;
 import datadog.trace.api.civisibility.telemetry.tag.IsRum;
@@ -62,6 +63,7 @@ public enum CiVisibilityCountMetric {
       IsBenchmark.class,
       EarlyFlakeDetectionAbortReason.class,
       IsNew.class,
+      IsModified.class,
       IsRetry.class,
       IsRum.class,
       BrowserDriver.class),

internal-api/src/main/java/datadog/trace/api/civisibility/telemetry/tag/IsModified.java

@@ -0,0 +1,13 @@
+package datadog.trace.api.civisibility.telemetry.tag;
+
+import datadog.trace.api.civisibility.telemetry.TagValue;
+
+/** Whether the definition of a test was modified. */
+public enum IsModified implements TagValue {
+  TRUE;
+
+  @Override
+  public String asString() {
+    return "is_modified:true";
+  }
+}