[🤖] Add Unit-Tests

tst/must_test.go

@@ -0,0 +1,49 @@
+package tst
+
+import (
+	"strconv"
+	"testing"
+)
+
+// --- Must -----------------------------------------------------------------
+
+func TestMust_NoError_Int(t *testing.T) {
+	v := Must(123, nil)(t)
+	AssertEqual(t, v, 123)
+}
+
+func TestMust_NoError_String(t *testing.T) {
+	v := Must("hello", nil)(t)
+	AssertEqual(t, v, "hello")
+}
+
+func TestMust_NoError_Slice(t *testing.T) {
+	v := Must([]int{1, 2, 3}, nil)(t)
+	AssertArrayEqual(t, v, []int{1, 2, 3})
+}
+
+func TestMust_NoError_Struct(t *testing.T) {
+	type s struct {
+		X int
+		Y string
+	}
+	v := Must(s{X: 7, Y: "abc"}, nil)(t)
+	AssertEqual(t, v, s{X: 7, Y: "abc"})
+}
+
+func TestMust_StrconvAtoi(t *testing.T) {
+	v := Must(strconv.Atoi("42"))(t)
+	AssertEqual(t, v, 42)
+}
+
+func TestMust_ZeroValueOnNoError(t *testing.T) {
+	v := Must(0, nil)(t)
+	AssertEqual(t, v, 0)
+}
+
+func TestMust_ReturnedFnIsNotNil(t *testing.T) {
+	fn := Must("anything", nil)
+	if fn == nil {
+		t.Fatal("Must should return a non-nil function")
+	}
+}