mirror of
https://github.com/projectcapsule/capsule.git
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102 lines
2.4 KiB
Go
102 lines
2.4 KiB
Go
// Copyright 2020-2025 Project Capsule Authors
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// SPDX-License-Identifier: Apache-2.0
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package utils
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import (
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"reflect"
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"testing"
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)
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func TestMapMergeNoOverrite_AddsNonOverlapping(t *testing.T) {
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dst := map[string]string{"a": "1"}
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src := map[string]string{"b": "2"}
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MapMergeNoOverrite(dst, src)
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if got, want := dst["a"], "1"; got != want {
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t.Fatalf("dst[a] = %q, want %q", got, want)
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}
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if got, want := dst["b"], "2"; got != want {
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t.Fatalf("dst[b] = %q, want %q", got, want)
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}
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if len(dst) != 2 {
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t.Fatalf("len(dst) = %d, want 2", len(dst))
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}
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}
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func TestMapMergeNoOverrite_DoesNotOverwriteExisting(t *testing.T) {
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dst := map[string]string{"a": "1"}
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src := map[string]string{"a": "X"} // overlapping key
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MapMergeNoOverrite(dst, src)
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if got, want := dst["a"], "1"; got != want {
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t.Fatalf("dst[a] overwritten: got %q, want %q", got, want)
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}
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}
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func TestMapMergeNoOverrite_EmptySrc_NoChange(t *testing.T) {
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dst := map[string]string{"a": "1"}
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src := map[string]string{} // empty
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before := make(map[string]string, len(dst))
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for k, v := range dst {
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before[k] = v
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}
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MapMergeNoOverrite(dst, src)
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if !reflect.DeepEqual(dst, before) {
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t.Fatalf("dst changed with empty src: got %#v, want %#v", dst, before)
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}
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}
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func TestMapMergeNoOverrite_NilSrc_NoChange(t *testing.T) {
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dst := map[string]string{"a": "1"}
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var src map[string]string // nil
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before := make(map[string]string, len(dst))
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for k, v := range dst {
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before[k] = v
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}
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MapMergeNoOverrite(dst, src)
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if !reflect.DeepEqual(dst, before) {
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t.Fatalf("dst changed with nil src: got %#v, want %#v", dst, before)
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}
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}
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func TestMapMergeNoOverrite_Idempotent(t *testing.T) {
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dst := map[string]string{"a": "1"}
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src := map[string]string{"b": "2"}
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MapMergeNoOverrite(dst, src)
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first := map[string]string{}
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for k, v := range dst {
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first[k] = v
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}
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// Call again; result should be identical
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MapMergeNoOverrite(dst, src)
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if !reflect.DeepEqual(dst, first) {
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t.Fatalf("non-idempotent merge: after second merge got %#v, want %#v", dst, first)
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}
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}
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func TestMapMergeNoOverrite_NilDst_Panics(t *testing.T) {
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defer func() {
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if r := recover(); r == nil {
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t.Fatalf("expected panic when dst is nil, but did not panic")
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}
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}()
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var dst map[string]string // nil destination map
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src := map[string]string{"a": "1"}
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// Writing to a nil map panics; document current behavior via this test.
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MapMergeNoOverrite(dst, src)
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}
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