angular speed tests

3 files changed, 67 insertions, 3 deletions

diff --git a/.gitignore b/.gitignore
index 2581c93..e371b4c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /volute
 *.o
+test_unit
diff --git a/Makefile b/Makefile
index 7e99a41..ec8d58b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
-CFLAGS = -std=c99 -Wall -Wextra -pedantic -Wno-deprecated-declarations
+CFLAGS = -std=c99 -Wall -Wextra -pedantic -Wno-deprecated-declarations -D_XOPEN_SOURCE=700L
 LDFLAGS = -lSDL2 -lSDL2_ttf
 
-SRC = main.c microui.c renderer.c widget.c ui.c
+SRC = main.c microui.c renderer.c widget.c ui.c unit.c
 OBJ = ${SRC:.c=.o}
 
 all: volute
@@ -9,10 +9,18 @@ all: volute
 clean:
 	rm -f volute *.o
 
+test: test_unit
+	for t in $^; do \
+		./$$t; \
+	done
+
+test_unit: test_unit.o unit.o
+	${CC} -o $@ $^ ${LDFLAGS}
+
 volute: ${OBJ}
 	${CC} -o $@ $^ ${LDFLAGS}
 
 %.o: %.c
 	${CC} -c ${CFLAGS} $<
 
-${OBJ}: microui.h renderer.h widget.h ui.h
+${OBJ}: microui.h renderer.h widget.h ui.h unit.h
diff --git a/test_unit.c b/test_unit.c
new file mode 100644
index 0000000..dc7de3e
--- /dev/null
+++ b/test_unit.c
@@ -0,0 +1,55 @@
+#include <assert.h>
+#include <stdio.h>
+
+#include "unit.h"
+
+
+#define EPSILON (1e-7)
+
+#define test(got, want) { \
+	if (got < want-EPSILON || got > want+EPSILON) { \
+		fprintf(stderr, "got %lf; want %lf\n", got, want); \
+		assert(got == want); \
+	} \
+}
+
+
+void
+test_rad_per_sec(void) {
+	test(rad_per_sec(123.456), 123.456);
+}
+
+void
+test_deg_per_sec(void) {
+	test(deg_per_sec(123.456), 2.15471367888);
+}
+
+void
+test_rpm(void) {
+	test(rpm(123.456), 12.92828207328);
+}
+
+void
+test_as_rad_per_sec(void) {
+	test(as_rad_per_sec(rad_per_sec(123.456)), 123.456);
+}
+
+void
+test_as_deg_per_sec(void) {
+	test(as_deg_per_sec(deg_per_sec(123.456)), 123.456);
+}
+
+void
+test_as_rpm(void) {
+	test(as_rpm(rpm(123.456)), 123.456);
+}
+
+int
+main(void) {
+	test_rad_per_sec();
+	test_deg_per_sec();
+	test_rpm();
+	test_as_rad_per_sec();
+	test_as_deg_per_sec();
+	test_as_rpm();
+}