Moving go code to subdir.

code/functions/functions_test.go

@@ -0,0 +1,52 @@
+package functions
+
+import (
+	"testing"
+	"fmt"
+)
+
+// Test fibonacci function
+
+func TestFibonacci(t *testing.T) {
+	var sequence = [4]int{1, 3, 5, 9}
+	var values = [4]int{1, 2, 5, 34}
+	for i := 0; i < len(sequence); i++ {
+		var seq, want = sequence[i], values[i]
+		outcome, error := MyFibonacci(seq)
+		if error != nil {
+			t.Errorf("Error trying to Fibonacci %d: %s", seq, error)
+		}
+		if outcome != want {
+			t.Errorf("Invalid outcome: Fibonacci sequence %d should be %d, got %d",
+				seq, want, outcome)
+		}
+	}
+}
+
+func TestFibBadNumber(t *testing.T) {
+	outcome,error := MyFibonacci(-4)
+	if error == nil {
+		t.Errorf("This should be an error, not a %d",outcome)
+	}
+}
+
+func TestSums(t *testing.T) {
+	var tests = []struct{
+		a, b int
+		want int
+	} {
+		{1, 2, 3},
+		{5, 3, 8},
+		{9, 4, 13},
+	}
+
+	for _, tt := range tests {
+		testname := fmt.Sprintf("%d+%d",tt.a, tt.b)
+		t.Run(testname, func(t *testing.T) {
+			result := sum(tt.a, tt.b)
+			if result != tt.want {
+				t.Errorf("Expected %d, got %d", tt.want,result)
+			}
+		})
+	}
+}