Add test coverage for StableConfigMappingException

Author: mtoffl01

internal-api/src/main/java/datadog/trace/bootstrap/config/provider/stableconfig/StableConfigMappingException.java

@@ -5,10 +5,6 @@ public StableConfigMappingException(String message) {
     super(message);
   }
 
-  public StableConfigMappingException(String message, Throwable cause) {
-    super(message, cause);
-  }
-
   public static String safeToString(Object value) {
     if (value == null) return "null";
     String str = value.toString();

internal-api/src/test/groovy/datadog/trace/bootstrap/config/provider/StableConfigMappingExceptionTest.groovy

@@ -0,0 +1,35 @@
+package datadog.trace.bootstrap.config.provider
+
+import datadog.trace.bootstrap.config.provider.stableconfig.StableConfigMappingException
+import spock.lang.Specification
+
+class StableConfigMappingExceptionTest extends Specification {
+
+  def "constructors work as expected"() {
+    when:
+    def ex1 = new StableConfigMappingException("msg")
+    def ex2 = new StableConfigMappingException("msg2")
+
+    then:
+    ex1.message == "msg"
+    ex1.cause == null
+    ex2.message == "msg2"
+  }
+
+  def "safeToString handles null"() {
+    expect:
+    StableConfigMappingException.safeToString(null) == "null"
+  }
+
+  def "safeToString handles short string"() {
+    expect:
+    StableConfigMappingException.safeToString("short string") == "short string"
+  }
+
+  def "safeToString handles long string"() {
+    given:
+    def longStr = "a" * 101
+    expect:
+    StableConfigMappingException.safeToString(longStr) == ("a" * 100) + "...(truncated)"
+  }
+}