1 files changed, 20 insertions, 0 deletions
diff --git a/test/lin.t.c b/test/lin.t.c
new file mode 100644
index 0000000..6ad1613
--- /dev/null
+++ b/test/lin.t.c
@@ -0,0 +1,20 @@
+#include "lizfcm.test.h"
+
+UTEST(Lin, least_squares_lin_reg_perfect) {
+  Array_double *x = InitArray(double, {0, 1, 2, 3, 4});
+  Array_double *y = InitArray(double, {1, 2, 3, 4, 5});
+
+  Line *line = least_squares_lin_reg(x, y);
+
+  EXPECT_EQ(line->m, 1.0);
+  EXPECT_EQ(line->a, 1.0);
+}
+
+UTEST(Lin, least_squares_lin_reg_estimate) {
+  Array_double *x = InitArray(double, {1, 2, 3, 4, 5, 6, 7});
+  Array_double *y = InitArray(double, {0.5, 3, 2, 3.5, 5, 6, 7.5});
+
+  Line *line = least_squares_lin_reg(x, y);
+
+  EXPECT_NEAR(line->m, 1.0, 0.2);
+}