From c3995a9d63fefcc0be6abf0ecd8e8c42995aed05 Mon Sep 17 00:00:00 2001
From: Dirk Zimoch <dirk.zimoch@psi.ch>
Date: Fri, 5 Oct 2018 17:00:35 +0200
Subject: [PATCH] added simple test case for epicsEnvUnset

---
 src/libCom/test/Makefile            |  5 ++++
 src/libCom/test/epicsEnvUnsetTest.c | 38 +++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 src/libCom/test/epicsEnvUnsetTest.c

diff --git a/src/libCom/test/Makefile b/src/libCom/test/Makefile
index 89eb87f6f..c80339317 100755
--- a/src/libCom/test/Makefile
+++ b/src/libCom/test/Makefile
@@ -62,6 +62,11 @@ epicsEnvTest_SRCS += epicsEnvTest.c
 testHarness_SRCS += epicsEnvTest.c
 TESTS += epicsEnvTest
 
+TESTPROD_HOST += epicsEnvUnsetTest
+epicsEnvUnsetTest_SRCS += epicsEnvUnsetTest.c
+testHarness_SRCS += epicsEnvUnsetTest.c
+TESTS += epicsEnvUnsetTest
+
 TESTPROD_HOST += epicsErrlogTest
 epicsErrlogTest_SRCS += epicsErrlogTest.c
 testHarness_SRCS += epicsErrlogTest.c
diff --git a/src/libCom/test/epicsEnvUnsetTest.c b/src/libCom/test/epicsEnvUnsetTest.c
new file mode 100644
index 000000000..3697a4b80
--- /dev/null
+++ b/src/libCom/test/epicsEnvUnsetTest.c
@@ -0,0 +1,38 @@
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "macLib.h"
+#include "envDefs.h"
+#include "errlog.h"
+#include "epicsUnitTest.h"
+#include "testMain.h"
+
+static void check(const char* variable, const char* expected)
+{
+    const char* value;
+    
+    value = getenv(variable);
+    if (!testOk((!expected && !value) || (expected && value && strcmp(expected, value) == 0),
+        "%s = \"%s\"", variable, value))
+    {
+        testDiag("should have been \"%s\"", expected);
+    }
+}
+
+
+MAIN(epicsEnvUnsetTest)
+{
+    eltc(0);
+    testPlan(3);
+
+    check("TEST_VAR_A",NULL);
+    epicsEnvSet("TEST_VAR_A","test value");
+    check("TEST_VAR_A","test value");
+    epicsEnvUnset("TEST_VAR_A");
+    check("TEST_VAR_A",NULL);
+
+    testDone();
+    return 0;
+}