Add tests of the precision generated by

assertion_traits<double>::toString().

1 files changed, 20 insertions, 1 deletions

diff --git a/examples/cppunittest/TestAssertTest.cpp b/examples/cppunittest/TestAssertTest.cpp
index 8719440..3b621ed 100644
--- a/examples/cppunittest/TestAssertTest.cpp
+++ b/examples/cppunittest/TestAssertTest.cpp
@@ -135,7 +135,6 @@ TestAssertTest::testAssertEqual()
   CPPUNIT_ASSERT_ASSERTION_FAIL( CPPUNIT_ASSERT_EQUAL( 1, 2 ) );
 }
 
-
 void 
 TestAssertTest::testAssertMessageTrue()
 {
@@ -173,6 +172,26 @@ TestAssertTest::testAssertDoubleEquals()
   CPPUNIT_ASSERT_ASSERTION_FAIL( CPPUNIT_ASSERT_DOUBLES_EQUAL( 1.2, 1.1, 0.09 ) );
 }
 
+/*
+ * Test that the error message from CPPUNIT_ASSERT_DOUBLES_EQUAL() 
+ * has more than the default 6 digits of precision.
+ */
+void 
+TestAssertTest::testAssertDoubleEqualsPrecision()
+{
+  std::string failure( "2.000000001" );
+  try
+  {
+    CPPUNIT_ASSERT_DOUBLES_EQUAL( 1.0, 2.000000001, 1 );
+  }
+  catch( CPPUNIT_NS::Exception &e )
+  {
+    checkMessageContains( &e, failure );
+    return;
+  }
+  CPPUNIT_FAIL( "Expected assertion failure" );
+}
+
 void 
 TestAssertTest::testAssertDoubleNonFinite()
 {