add ProductTs test

Author: jandro996

internal-api/src/test/groovy/datadog/trace/api/ProductTsTest.groovy

@@ -0,0 +1,60 @@
+package datadog.trace.api
+
+import datadog.trace.test.util.DDSpecification
+
+class ProductTsTest extends DDSpecification {
+
+  void 'test updateProduct'(){
+    when:
+    final result = ProductTs.updateProduct(init, newProduct)
+
+    then:
+    result == expected
+
+    where:
+    init          | newProduct    | expected
+    0             | ProductTs.ASM | ProductTs.ASM
+    ProductTs.ASM | ProductTs.DSM | 6
+  }
+
+  void 'test isProductMarked'(){
+    when:
+    final result = ProductTs.isProductMarked(value, product)
+
+    then:
+    result == expected
+
+    where:
+    value         | product       | expected
+    ProductTs.ASM | ProductTs.ASM | true
+    ProductTs.DSM | ProductTs.ASM | false
+  }
+
+  void 'test getBitfieldHex'(){
+    when:
+    final result = ProductTs.getBitfieldHex(value)
+
+    then:
+    result == expected
+
+    where:
+    value         | expected
+    0             | "00"
+    ProductTs.ASM | "02"
+  }
+
+  void 'test parseBitfieldHex'(){
+    when:
+    final result = ProductTs.parseBitfieldHex(hex)
+
+    then:
+    result == expected
+
+    where:
+    hex  | expected
+    "00" | 0
+    null | 0
+    ""   | 0
+    "02" | ProductTs.ASM
+  }
+}