1 files changed, 149 insertions, 0 deletions
diff --git a/generic/generic_test.go b/generic/generic_test.go
new file mode 100644
index 0000000..953f2ac
--- /dev/null
+++ b/generic/generic_test.go
@@ -0,0 +1,149 @@
+package generic
+
+import (
+	"maps"
+	"slices"
+	"testing"
+)
+
+type X struct{}
+
+func TestZero(t *testing.T) {
+	if Zero[int]() != 0 {
+		t.Errorf("Zero[int]() != 0")
+	}
+	if Zero[string]() != "" {
+		t.Errorf(`Zero[string]() != ""`)
+	}
+	if Zero[bool]() != false {
+		t.Errorf("Zero[bool]() != false")
+	}
+	if Zero[*X]() != nil {
+		t.Errorf("Zero[*X]() != nil")
+	}
+}
+
+func TestIsZero(t *testing.T) {
+	tests := []struct {
+		name string
+		val  any
+		want bool
+	}{
+		{
+			name: "int zero",
+			val:  0,
+			want: true,
+		},
+		{
+			"int non-zero",
+			1,
+			false,
+		},
+		{
+			"string zero",
+			"",
+			true,
+		},
+		{
+			"string non-zero",
+			"x",
+			false,
+		},
+		{
+			"nil pointer",
+			(*X)(nil),
+			true,
+		},
+		{
+			"non-nil pointer",
+			Ptr(X{}),
+			false,
+		},
+	}
+
+	for _, tt := range tests {
+		switch v := tt.val.(type) {
+		case int:
+			got := IsZero(v)
+			if got != tt.want {
+				t.Errorf("%s: got %v, want %v", tt.name, got, tt.want)
+			}
+		case string:
+			got := IsZero(v)
+			if got != tt.want {
+				t.Errorf("%s: got %v, want %v", tt.name, got, tt.want)
+			}
+		case *X:
+			got := IsZero(v)
+			if got != tt.want {
+				t.Errorf("%s: got %v, want %v", tt.name, got, tt.want)
+			}
+		}
+	}
+}
+
+func TestPtr(t *testing.T) {
+	v := 42
+	p := Ptr(v)
+	if p == nil || *p != v {
+		t.Errorf("Ptr(42) = %v, want pointer to 42", p)
+	}
+}
+
+func TestKeys(t *testing.T) {
+	m := map[string]int{"a": 1, "b": 2, "c": 3}
+	seq := Keys(maps.All(m))
+	keys := slices.Collect(seq)
+	want := slices.Collect(maps.Keys(m))
+
+	slices.Sort(keys)
+	slices.Sort(want)
+	if !slices.Equal(keys, want) {
+		t.Errorf("Keys() = %v, want %v", keys, want)
+	}
+}
+
+func TestValue(t *testing.T) {
+	m := map[string]int{"a": 1, "b": 2, "c": 3}
+	seq := Value(maps.All(m))
+	values := slices.Collect(seq)
+	want := slices.Collect(maps.Values(m))
+
+	// unordered compare
+	slices.Sort(values)
+	slices.Sort(want)
+	if !slices.Equal(values, want) {
+		t.Errorf("Values() = %v, want %v", values, want)
+	}
+}
+
+func TestSet_Add_Has_Del(t *testing.T) {
+	s := NewSet[int]()
+	if s.Has(10) {
+		t.Errorf("Set should not contain 10 initially")
+	}
+	s.Add(10)
+	if !s.Has(10) {
+		t.Errorf("Set should contain 10 after Add")
+	}
+	s.Del(10)
+	if s.Has(10) {
+		t.Errorf("Set should not contain 10 after Del")
+	}
+}
+
+func TestSet_All(t *testing.T) {
+	s := NewSet[string]()
+	s.Add("x")
+	s.Add("y")
+	s.Add("z")
+
+	got := slices.Collect(s.All())
+	want := []string{"x", "y", "z"}
+
+	slices.Sort(got)
+	slices.Sort(want)
+	if !slices.Equal(got, want) {
+		t.Errorf("Set.All() = %v, want %v", got, want)
+	}
+}