From 2f08f7cc4b9c7ad2f0a33b5367c2f3fd4ae4ed7e Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Fri, 1 Mar 2019 20:01:29 -0500
Subject: initial tests for <complex.h>

---
 Makefile  |  1 +
 complex.c | 29 +++++++++++++++++++++++++++++
 main.c    |  2 +-
 3 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 complex.c

diff --git a/Makefile b/Makefile
index 13f953f..d84925d 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,7 @@ LDFLAGS=-L$(LIBDIR) $(LIBS)
 
 TESTOBJS=main.o \
 	assert.o \
+	complex.o \
 	ctype.o \
 	errno.o \
 	float.o \
diff --git a/complex.c b/complex.c
new file mode 100644
index 0000000..c7bccd5
--- /dev/null
+++ b/complex.c
@@ -0,0 +1,29 @@
+#if defined __STDC_VERSION__ && \
+	(__STDC_VERSION__ == 199901L || \
+	 (20112L <= __STDC_VERSION__ && ! defined __STDC_NO_COMPLEX__))
+#include <complex.h>
+#include "test.h"
+
+void test_complex_h(void)
+{
+	complex double cd;
+	testing_header("complex.h");
+
+	test_true(creal(I) == 0);
+	test_true(cimag(I) == 1);
+	test_true(creal(_Complex_I) == 0);
+	test_true(cimag(_Complex_I) == 1);
+
+	#ifdef _Imaginary_I
+	test_true(creal(_Imaginary_I) == 0);
+	test_true(cimag(_Imaginary_I) == 1);
+	#endif
+
+	testing_end();
+}
+
+#else
+void test_complex_h(void)
+{
+}
+#endif
diff --git a/main.c b/main.c
index 1fda841..fdcad73 100644
--- a/main.c
+++ b/main.c
@@ -40,7 +40,7 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	/* test_complex_h(); */
+	test_complex_h();
 	test_ctype_h();
 	test_errno_h();
 	/* test_fenv_h(); */
-- 
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