feat: generate random decimals with decimal points

core/model/src/main/kotlin/au/com/dius/pact/core/model/generators/Generator.kt

@@ -126,7 +126,23 @@ data class RandomDecimalGenerator(val digits: Int) : Generator {
     return mapOf("type" to "RandomDecimal", "digits" to digits)
   }
 
-  override fun generate(context: Map<String, Any?>): Any = BigDecimal(RandomStringUtils.randomNumeric(digits))
+  override fun generate(context: Map<String, Any?>): Any {
+    val sampleDigits = RandomStringUtils.randomNumeric(digits + 1)
+    val pos = RandomUtils.nextInt(1, digits - 1)
+    val selectedDigits = if (sampleDigits.startsWith("00")) {
+      RandomUtils.nextInt(1, 9).toString() + sampleDigits.substring(1, digits)
+    } else if (pos != 1 && sampleDigits.startsWith('0')) {
+      sampleDigits.substring(1)
+    } else {
+      sampleDigits.substring(0, digits)
+    }
+    val generated = "${selectedDigits.substring(0, pos)}.${selectedDigits.substring(pos)}"
+    logger.trace {
+      "RandomDecimalGenerator: sampleDigits=[$sampleDigits], pos=$pos, selectedDigits=[$selectedDigits], " +
+        "generated=[$generated]"
+    }
+    return BigDecimal(generated)
+  }
 
   companion object {
     fun fromJson(json: JsonValue.Object): RandomDecimalGenerator {

core/model/src/test/groovy/au/com/dius/pact/core/model/generators/RandomDecimalGeneratorSpec.groovy

@@ -0,0 +1,23 @@
+package au.com.dius.pact.core.model.generators
+
+import spock.lang.Rollup
+import spock.lang.Specification
+
+class RandomDecimalGeneratorSpec extends Specification {
+
+  @Rollup
+  def 'generates a value with a decimal point and only a leading zero if the point is in the second position'() {
+    given:
+    def generator = new RandomDecimalGenerator(8)
+
+    expect:
+    with(generator.generate([:]).toString()) {
+      it.length() == 9
+      it ==~ /^\d+\.\d+/
+      it[0] != '0' || (it[0] == '0' && it[1] == '.')
+    }
+
+    where:
+    _samples << (1..100).step(1)
+  }
+}