TestUtils: add some formatting toString methods to make test failures easier to read.

src/TestUtils.kt

@@ -7,6 +7,7 @@ class DummyPublicKey(private val s: String) : PublicKey, Comparable<PublicKey> {
     override fun getEncoded() = s.toByteArray()
     override fun getFormat() = "ASN.1"
     override fun compareTo(other: PublicKey): Int = BigInteger(encoded).compareTo(BigInteger(other.encoded))
+    override fun toString() = "PUBKEY[$s]"
 }
 
 // A few dummy values for testing.
@@ -81,6 +82,14 @@ data class TransactionForTest(
         tx.body()
         return tx
     }
+
+    override fun toString(): String {
+        return """transaction {
+            inputs:   $inStates
+            outputs:  $outStates
+            args:     $args
+        }"""
+    }
 }
 
 fun transaction(body: TransactionForTest.() -> Unit): TransactionForTest {

src/Utils.kt

@@ -43,6 +43,9 @@ val USD = Currency.getInstance("USD")
 val GBP = Currency.getInstance("GBP")
 val CHF = Currency.getInstance("CHF")
 
-val Int.DOLLARS: Amount get() = Amount(this, USD)
+val Int.DOLLARS: Amount get() = Amount(this * 100, USD)
-val Int.POUNDS: Amount get() = Amount(this, GBP)
+val Int.POUNDS: Amount get() = Amount(this * 100, GBP)
-val Int.SWISS_FRANCS: Amount get() = Amount(this, CHF)
+val Int.SWISS_FRANCS: Amount get() = Amount(this * 100, CHF)
+val Double.DOLLARS: Amount get() = Amount((this * 100).toInt(), USD)
+val Double.POUNDS: Amount get() = Amount((this * 100).toInt(), USD)
+val Double.SWISS_FRANCS: Amount get() = Amount((this * 100).toInt(), USD)