Cleanup unit test support code (RIPD-1380):

* Remove `src/test/support/mao`
* Flatten `src/test/support/jtx` to `src/test/jtx`

src/test/jtx/impl/paths.cpp

@@ -0,0 +1,96 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2012, 2013 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <BeastConfig.h>
+#include <ripple/app/paths/Pathfinder.h>
+#include <test/jtx/paths.h>
+#include <ripple/protocol/JsonFields.h>
+
+namespace ripple {
+namespace test {
+namespace jtx {
+
+void
+paths::operator()(Env& env, JTx& jt) const
+{
+    auto& jv = jt.jv;
+    auto const from = env.lookup(
+        jv[jss::Account].asString());
+    auto const to = env.lookup(
+        jv[jss::Destination].asString());
+    auto const amount = amountFromJson(
+        sfAmount, jv[jss::Amount]);
+    Pathfinder pf (
+        std::make_shared<RippleLineCache>(env.current()),
+            from, to, in_.currency, in_.account,
+                amount, boost::none, env.app());
+    if (! pf.findPaths(depth_))
+        return;
+
+    STPath fp;
+    pf.computePathRanks (limit_);
+    auto const found = pf.getBestPaths(
+        limit_, fp, {}, in_.account);
+
+    // VFALCO TODO API to allow caller to examine the STPathSet
+    // VFALCO isDefault should be renamed to empty()
+    if (! found.isDefault())
+        jv[jss::Paths] = found.getJson(0);
+}
+
+//------------------------------------------------------------------------------
+
+Json::Value&
+path::create()
+{
+    return jv_.append(Json::objectValue);
+}
+
+void
+path::append_one(Account const& account)
+{
+    auto& jv = create();
+    jv["account"] = toBase58(account.id());
+}
+
+void
+path::append_one(IOU const& iou)
+{
+    auto& jv = create();
+    jv["currency"] = to_string(iou.issue().currency);
+    jv["account"] = toBase58(iou.issue().account);
+}
+
+void
+path::append_one(BookSpec const& book)
+{
+    auto& jv = create();
+    jv["currency"] = to_string(book.currency);
+    jv["issuer"] = toBase58(book.account);
+}
+
+void
+path::operator()(Env& env, JTx& jt) const
+{
+    jt.jv["Paths"].append(jv_);
+}
+
+} // jtx
+} // test
+} // ripple