1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236import { describe, it, expect } from "vitest";
import path from "node:path";
import vinext from "../packages/vinext/src/index.js";
import type { Plugin } from "vite";
// ── Helpers ───────────────────────────────────────────────────
const IMAGES_DIR = path.resolve(import.meta.dirname, "./fixtures/images");
const PNG_PATH = path.join(IMAGES_DIR, "test-4x3.png");
const JPG_PATH = path.join(IMAGES_DIR, "test-8x6.jpg");
/** Unwrap a Vite plugin hook that may use the object-with-filter format */
function unwrapHook(hook: any): Function {
return typeof hook === "function" ? hook : hook?.handler;
}
/** Extract the vinext:image-imports plugin from the plugin array */
function getImagePlugin(): Plugin & { _dimCache: Map<string, { width: number; height: number }> } {
const plugins = vinext() as Plugin[];
const plugin = plugins.find((p) => p.name === "vinext:image-imports");
if (!plugin) throw new Error("vinext:image-imports plugin not found");
return plugin as any;
}
// ── resolveId ─────────────────────────────────────────────────
describe("vinext:image-imports — resolveId", () => {
it("resolves ?vinext-meta suffix to virtual module ID", () => {
const plugin = getImagePlugin();
const resolve = unwrapHook(plugin.resolveId);
const result = resolve.call(plugin, "/abs/path/hero.jpg?vinext-meta", "/some/file.tsx");
expect(result).toBe("\0vinext-image-meta:/abs/path/hero.jpg");
});
it("returns null for non-meta imports", () => {
const plugin = getImagePlugin();
const resolve = unwrapHook(plugin.resolveId);
expect(resolve.call(plugin, "./hero.jpg", "/some/file.tsx")).toBeNull();
expect(resolve.call(plugin, "react", "/some/file.tsx")).toBeNull();
expect(resolve.call(plugin, "next/image", "/some/file.tsx")).toBeNull();
});
});
// ── load ──────────────────────────────────────────────────────
describe("vinext:image-imports — load", () => {
it("returns dimensions for a PNG file", async () => {
const plugin = getImagePlugin();
const load = plugin.load as Function;
const result = await load.call(plugin, `\0vinext-image-meta:${PNG_PATH}`);
expect(result).toContain("export default");
const json = result.replace("export default ", "").replace(";", "");
const dims = JSON.parse(json);
expect(dims.width).toBe(4);
expect(dims.height).toBe(3);
});
it("returns dimensions for a JPEG file", async () => {
const plugin = getImagePlugin();
const load = plugin.load as Function;
const result = await load.call(plugin, `\0vinext-image-meta:${JPG_PATH}`);
const json = result.replace("export default ", "").replace(";", "");
const dims = JSON.parse(json);
expect(dims.width).toBe(8);
expect(dims.height).toBe(6);
});
it("returns 0x0 for non-existent file", async () => {
const plugin = getImagePlugin();
const load = plugin.load as Function;
const result = await load.call(plugin, "\0vinext-image-meta:/no/such/file.png");
const json = result.replace("export default ", "").replace(";", "");
const dims = JSON.parse(json);
expect(dims.width).toBe(0);
expect(dims.height).toBe(0);
});
it("returns null for non-image-meta IDs", async () => {
const plugin = getImagePlugin();
const load = plugin.load as Function;
expect(await load.call(plugin, "./hero.jpg")).toBeNull();
expect(await load.call(plugin, "react")).toBeNull();
});
it("caches dimensions on second call", async () => {
const plugin = getImagePlugin();
plugin._dimCache.clear();
const load = plugin.load as Function;
await load.call(plugin, `\0vinext-image-meta:${PNG_PATH}`);
expect(plugin._dimCache.has(PNG_PATH)).toBe(true);
// Second call uses cache (no way to verify directly, but should not throw)
const result = await load.call(plugin, `\0vinext-image-meta:${PNG_PATH}`);
expect(result).toContain('"width":4');
});
});
// ── transform ─────────────────────────────────────────────────
describe("vinext:image-imports — transform", () => {
// Fake file ID in the images directory so path.resolve works
const fakeId = path.join(IMAGES_DIR, "page.tsx");
it("transforms a PNG import into StaticImageData", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import hero from './test-4x3.png';\nconsole.log(hero);`;
const result = await transform.call(plugin, code, fakeId);
expect(result).not.toBeNull();
expect(result.code).toContain("__vinext_img_url_hero");
expect(result.code).toContain("__vinext_img_meta_hero");
expect(result.code).toContain("const hero = { src: __vinext_img_url_hero");
expect(result.code).toContain("?vinext-meta");
expect(result.code).not.toContain("import hero from");
expect(result.map).toBeDefined();
});
it("transforms a JPEG import", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import photo from './test-8x6.jpg';`;
const result = await transform.call(plugin, code, fakeId);
expect(result).not.toBeNull();
expect(result.code).toContain("__vinext_img_url_photo");
expect(result.code).toContain("const photo = { src: __vinext_img_url_photo");
});
it("transforms multiple image imports in one file", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = [
`import hero from './test-4x3.png';`,
`import photo from './test-8x6.jpg';`,
`export default function Page() { return null; }`,
].join("\n");
const result = await transform.call(plugin, code, fakeId);
expect(result).not.toBeNull();
expect(result.code).toContain("__vinext_img_url_hero");
expect(result.code).toContain("__vinext_img_url_photo");
expect(result.code).toContain("const hero =");
expect(result.code).toContain("const photo =");
});
it("handles various image extensions", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
// These files don't exist so transform should skip them (fs.existsSync check),
// but the regex should still match — we verify by testing with a real file
const code = `import icon from './test-4x3.png';`;
const result = await transform.call(plugin, code, fakeId);
expect(result).not.toBeNull();
expect(result.code).toContain("__vinext_img_url_icon");
});
it("returns null for files with no image imports", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import React from 'react';\nconst x = 1;`;
const result = await transform.call(plugin, code, fakeId);
expect(result).toBeNull();
});
it("returns null for node_modules files", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import hero from './hero.png';`;
const result = await transform.call(plugin, code, path.join("node_modules", "pkg", "index.ts"));
expect(result).toBeNull();
});
it("returns null for virtual modules (\\0 prefix)", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import hero from './hero.png';`;
const result = await transform.call(plugin, code, "\0virtual:something");
expect(result).toBeNull();
});
it("returns null for non-script files", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import hero from './hero.png';`;
const result = await transform.call(plugin, code, "/app/styles.css");
expect(result).toBeNull();
});
it("skips imports where the image file does not exist", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import ghost from './nonexistent.png';`;
const result = await transform.call(plugin, code, fakeId);
// Regex matches but fs.existsSync fails — no changes made
expect(result).toBeNull();
});
it("preserves non-image imports alongside image imports", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = [
`import React from 'react';`,
`import hero from './test-4x3.png';`,
`import { useState } from 'react';`,
].join("\n");
const result = await transform.call(plugin, code, fakeId);
expect(result).not.toBeNull();
// React imports should still be there
expect(result.code).toContain(`import React from 'react'`);
expect(result.code).toContain(`import { useState } from 'react'`);
// Image import should be transformed
expect(result.code).toContain("__vinext_img_url_hero");
});
it("handles single-quoted imports", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import hero from './test-4x3.png';`;
const result = await transform.call(plugin, code, fakeId);
expect(result).not.toBeNull();
expect(result.code).toContain("__vinext_img_url_hero");
});
it("handles double-quoted imports", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import hero from "./test-4x3.png";`;
const result = await transform.call(plugin, code, fakeId);
expect(result).not.toBeNull();
expect(result.code).toContain("__vinext_img_url_hero");
});
it("uses absolute path in meta import", async () => {
const plugin = getImagePlugin();
const transform = unwrapHook(plugin.transform);
const code = `import hero from './test-4x3.png';`;
const result = await transform.call(plugin, code, fakeId);
expect(result).not.toBeNull();
// Meta import should reference the absolute path
expect(result.code).toContain(PNG_PATH + "?vinext-meta");
});
});