Add unit tests for *table

internal/mylua/value_test.go

@@ -0,0 +1,53 @@
+// Copyright 2024 The zb Authors
+// SPDX-License-Identifier: MIT
+
+package mylua
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestEmptyTable(t *testing.T) {
+	tab := newTable(0)
+	if got, want := valueType(tab), TypeTable; got != want {
+		t.Errorf("valueType(newTable(0)) = %v; want %v", got, want)
+	}
+	if got := tab.len(); got != 0 {
+		t.Errorf("newTable(0).len() = %d; want 0", got)
+	}
+	if got := tab.get(stringValue{s: "bork"}); got != nil {
+		t.Errorf("newTable(0).get(\"bork\") = %#v; want <nil>", got)
+	}
+}
+
+func TestArrayTable(t *testing.T) {
+	tab := newTable(3)
+	const want1 integerValue = 42
+	tab.set(integerValue(1), want1)
+	const want2 = "abc"
+	tab.set(integerValue(2), stringValue{s: want2})
+	const want3 floatValue = 3.14
+	tab.set(integerValue(3), want3)
+
+	if got, want := tab.len(), integerValue(3); got != want {
+		t.Errorf("tab.len() = %d; want %d", got, want)
+	}
+	if got := tab.get(integerValue(1)); got != want1 {
+		t.Errorf("tab.get(integerValue(1)) = %#v; want %#v", got, want1)
+	}
+	if got := tab.get(integerValue(2)); !cmp.Equal(stringValue{s: want2}, got, cmpValueOptions) {
+		t.Errorf("tab.get(integerValue(2)) = %#v; want %#v", got, want2)
+	}
+	if got := tab.get(integerValue(3)); got != want3 {
+		t.Errorf("tab.get(integerValue(3)) = %#v; want %#v", got, want3)
+	}
+	if got := tab.get(integerValue(4)); got != nil {
+		t.Errorf("tab.get(integerValue(4)) = %#v; want <nil>", got)
+	}
+}
+
+var cmpValueOptions = cmp.Options{
+	cmp.AllowUnexported(stringValue{}),
+}