commit c67e1e8730a2d3dcb155b21ced735ee188e8ea7f
author Patrick Williams <patrick@stwcx.xyz> Wed Nov 04 12:39:24 2020 -0600
committer Patrick Williams <patrick@stwcx.xyz> Wed Nov 04 21:01:56 2020 -0600
tree a5663f4299b9d335e1b08eeb861b3d814e7e040c
parent 8fc063973ae2ccab651603b6eab62f2e82554b1a

sdbus++: support special double values

Enable properties to have default values of special IEEE floating
points: 'NaN', 'infinity' and 'epsilon'.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I7c2daa3c36cde69c2ee06afd75a8d2e77992c6e7

test/server/Test.interface.yaml

diff --git a/test/server/Test.interface.yaml b/test/server/Test.interface.yaml
index 30df1f9..ed98eb3 100644
--- a/test/server/Test.interface.yaml
+++ b/test/server/Test.interface.yaml
@@ -22,3 +22,15 @@
       type: uint64
     - name: ObjectPath
       type: object_path
+    - name: DoubleAsNAN
+      type: double
+      default: NaN
+    - name: DoubleAsInf
+      type: double
+      default: Infinity
+    - name: DoubleAsNegInf
+      type: double
+      default: -Infinity
+    - name: DoubleAsEpsilon
+      type: double
+      default: Epsilon

test/server/object.cpp

diff --git a/test/server/object.cpp b/test/server/object.cpp
index 8faa668..76e077d 100644
--- a/test/server/object.cpp
+++ b/test/server/object.cpp
@@ -103,3 +103,24 @@
                 sd_bus_emit_interfaces_removed_strv(_, StrEq(objPath), _))
         .Times(0);
 }
+
+TEST_F(Object, DoubleHasDefaultValues)
+{
+    // Simulate the typical usage of a service
+    sdbusplus::server::manager::manager objManager(bus, objPath);
+    bus.request_name(busName);
+
+    EXPECT_CALL(sdbusMock, sd_bus_emit_object_added(_, StrEq(objPath)))
+        .Times(1);
+    EXPECT_CALL(sdbusMock,
+                sd_bus_emit_interfaces_added_strv(_, StrEq(objPath), _))
+        .Times(0);
+
+    auto test = std::make_unique<TestInherit>(bus, objPath);
+    EXPECT_TRUE(std::isnan(test->doubleAsNAN()));
+    EXPECT_TRUE(std::isinf(test->doubleAsInf()) &&
+                !std::signbit(test->doubleAsInf()));
+    EXPECT_TRUE(std::isinf(test->doubleAsNegInf()) &&
+                std::signbit(test->doubleAsNegInf()));
+    EXPECT_EQ(std::numeric_limits<double>::epsilon(), test->doubleAsEpsilon());
+}