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1+package chat
2+
3+import (
4+ "strings"
5+ "testing"
6+ "time"
7+
8+ "github.com/charmbracelet/crush/internal/message"
9+ "github.com/charmbracelet/crush/internal/ui/attachments"
10+ "github.com/charmbracelet/crush/internal/ui/styles"
11+ "github.com/stretchr/testify/require"
12+)
13+
14+// finishedAssistantMessage builds an assistant message with text content and a
15+// finish part so AssistantMessageItem.isSpinning returns false and the
16+// prefix cache is exercised.
17+func finishedAssistantMessage(id, text string) *message.Message {
18+ return &message.Message{
19+ ID: id,
20+ Role: message.Assistant,
21+ Parts: []message.ContentPart{
22+ message.TextContent{Text: text},
23+ message.Finish{Reason: message.FinishReasonEndTurn, Time: time.Now().Unix()},
24+ },
25+ }
26+}
27+
28+// TestAssistantMessageItemRender_PrefixCacheFocusBlur covers the F3 invariant
29+// that focus → blur → focus produces the correct prefix every time and never
30+// leaks the previous focus state out of the cache.
31+func TestAssistantMessageItemRender_PrefixCacheFocusBlur(t *testing.T) {
32+ t.Parallel()
33+
34+ sty := styles.CharmtonePantera()
35+ msg := finishedAssistantMessage("m1", "Hello world from the cache test.")
36+ item := NewAssistantMessageItem(&sty, msg).(*AssistantMessageItem)
37+
38+ const width = 60
39+
40+ item.SetFocused(true)
41+ focused1 := item.Render(width)
42+ focused2 := item.Render(width)
43+ require.Equal(t, focused1, focused2, "second render must hit the cache and match the first")
44+
45+ item.SetFocused(false)
46+ blurred1 := item.Render(width)
47+ require.NotEqual(t, focused1, blurred1, "blur must produce a different prefixed render than focus")
48+
49+ item.SetFocused(true)
50+ focused3 := item.Render(width)
51+ require.Equal(t, focused1, focused3, "re-focus must produce identical output to the original focused render")
52+}
53+
54+// TestAssistantMessageItemRender_PrefixCacheWidthInvalidates asserts that a
55+// width change does not return the previous width's cached output.
56+func TestAssistantMessageItemRender_PrefixCacheWidthInvalidates(t *testing.T) {
57+ t.Parallel()
58+
59+ sty := styles.CharmtonePantera()
60+ msg := finishedAssistantMessage("m2", "Some content that wraps differently at different widths so the rendered output diverges.")
61+ item := NewAssistantMessageItem(&sty, msg).(*AssistantMessageItem)
62+ item.SetFocused(true)
63+
64+ narrow := item.Render(40)
65+ wide := item.Render(100)
66+ require.NotEqual(t, narrow, wide, "different widths must produce different rendered output")
67+
68+ narrowAgain := item.Render(40)
69+ require.Equal(t, narrow, narrowAgain, "returning to the original width must hit (or repopulate) the cache with the same output")
70+}
71+
72+// TestAssistantMessageItemRender_PrefixCacheHighlightOnTop guarantees that
73+// activating a highlight range bypasses the prefix cache so selection drags
74+// reflect immediately, and that clearing the highlight returns to the cached
75+// prefixed output unchanged.
76+func TestAssistantMessageItemRender_PrefixCacheHighlightOnTop(t *testing.T) {
77+ t.Parallel()
78+
79+ sty := styles.CharmtonePantera()
80+ msg := finishedAssistantMessage("m3", "Hello world from the highlight test.")
81+ item := NewAssistantMessageItem(&sty, msg).(*AssistantMessageItem)
82+ item.SetFocused(true)
83+
84+ const width = 60
85+ plain := item.Render(width)
86+
87+ // Activating a highlight must change the rendered output (selection
88+ // painted on top) without poisoning the cache for the un-highlighted
89+ // state that follows.
90+ item.SetHighlight(0, 0, 0, 5)
91+ highlighted := item.Render(width)
92+ require.NotEqual(t, plain, highlighted, "active highlight must change Render output")
93+
94+ // Clear the highlight; the cached un-highlighted prefix render must
95+ // be returned unchanged.
96+ item.SetHighlight(-1, -1, -1, -1)
97+ plainAfter := item.Render(width)
98+ require.Equal(t, plain, plainAfter, "clearing the highlight must restore the cached prefixed output exactly")
99+}
100+
101+// TestUserMessageItemRender_PrefixCacheFocusBlur is the user-message
102+// counterpart of the assistant focus/blur cache test.
103+func TestUserMessageItemRender_PrefixCacheFocusBlur(t *testing.T) {
104+ t.Parallel()
105+
106+ sty := styles.CharmtonePantera()
107+ msg := &message.Message{
108+ ID: "u1",
109+ Role: message.User,
110+ Parts: []message.ContentPart{
111+ message.TextContent{Text: "Hello from the user."},
112+ },
113+ }
114+ r := attachments.NewRenderer(
115+ sty.Attachments.Normal,
116+ sty.Attachments.Deleting,
117+ sty.Attachments.Image,
118+ sty.Attachments.Text,
119+ )
120+ item := NewUserMessageItem(&sty, msg, r).(*UserMessageItem)
121+
122+ const width = 60
123+
124+ item.SetFocused(true)
125+ focused1 := item.Render(width)
126+ focused2 := item.Render(width)
127+ require.Equal(t, focused1, focused2)
128+
129+ item.SetFocused(false)
130+ blurred := item.Render(width)
131+ require.NotEqual(t, focused1, blurred)
132+
133+ item.SetFocused(true)
134+ focused3 := item.Render(width)
135+ require.Equal(t, focused1, focused3)
136+}
137+
138+// TestCachedMessageItem_PrefixCacheSemantics covers the constant-prefix
139+// path used by AssistantInfoItem and the (width, key) keying used by every
140+// item, against the underlying cachedMessageItem helper directly. This
141+// avoids constructing a full *config.Config with an initialized provider
142+// map just to exercise cache plumbing that is identical for all callers.
143+func TestCachedMessageItem_PrefixCacheSemantics(t *testing.T) {
144+ t.Parallel()
145+
146+ c := &cachedMessageItem{}
147+
148+ // Empty cache: miss.
149+ _, ok := c.getCachedPrefixedRender(80, 0)
150+ require.False(t, ok)
151+
152+ // Set then hit at the same (width, key).
153+ c.setCachedPrefixedRender("hello", 80, 0)
154+ got, ok := c.getCachedPrefixedRender(80, 0)
155+ require.True(t, ok)
156+ require.Equal(t, "hello", got)
157+
158+ // Different width: miss.
159+ _, ok = c.getCachedPrefixedRender(120, 0)
160+ require.False(t, ok)
161+
162+ // Different key (focused vs blurred): miss.
163+ _, ok = c.getCachedPrefixedRender(80, 1)
164+ require.False(t, ok)
165+
166+ // clearCache drops the prefixed cache too.
167+ c.setCachedRender("raw", 80, 1)
168+ c.setCachedPrefixedRender("hello", 80, 0)
169+ c.clearCache()
170+ _, ok = c.getCachedPrefixedRender(80, 0)
171+ require.False(t, ok, "clearCache must drop the prefixed render cache")
172+ _, _, ok = c.getCachedRender(80)
173+ require.False(t, ok, "clearCache must also drop the raw render cache")
174+}
175+
176+// TestAssistantMessageItemRender_PrefixCacheNoCacheLeak guards against a
177+// regression where the cache returned the prefixed output of the previous
178+// width. We verify that the cached output for width=W contains the W-sized
179+// prefix and not a stale wider one by checking that line lengths are
180+// consistent on cache hit.
181+func TestAssistantMessageItemRender_PrefixCacheNoCacheLeak(t *testing.T) {
182+ t.Parallel()
183+
184+ sty := styles.CharmtonePantera()
185+ msg := finishedAssistantMessage("m4", strings.Repeat("word ", 40))
186+ item := NewAssistantMessageItem(&sty, msg).(*AssistantMessageItem)
187+ item.SetFocused(true)
188+
189+ out80 := item.Render(80)
190+ out120 := item.Render(120)
191+ require.NotEqual(t, out80, out120)
192+
193+ // Hit each cached entry again and confirm stability.
194+ require.Equal(t, out80, item.Render(80))
195+ require.Equal(t, out120, item.Render(120))
196+}