feat: support reverse-proxy URL subpaths (llama-swap, SwarmUI) (#1122)

vue-widgets/tests/unit/basePath.test.ts

@@ -0,0 +1,46 @@
+import { afterEach, describe, expect, it } from 'vitest'
+import { getLmBasePath, lmApiUrl } from '@/utils/basePath'
+
+const originalPathname = window.location.pathname
+
+function setPathname(pathname: string) {
+  window.history.replaceState(null, '', pathname)
+}
+
+afterEach(() => {
+  setPathname(originalPathname)
+})
+
+describe('getLmBasePath', () => {
+  it('returns an empty string when ComfyUI is served at the root', () => {
+    setPathname('/')
+
+    expect(getLmBasePath()).toBe('')
+  })
+
+  it('strips the trailing slash from a subpath prefix', () => {
+    setPathname('/comfyui/')
+
+    expect(getLmBasePath()).toBe('/comfyui')
+  })
+
+  it('keeps a prefix without a trailing slash as-is', () => {
+    setPathname('/ComfyBackendDirect')
+
+    expect(getLmBasePath()).toBe('/ComfyBackendDirect')
+  })
+})
+
+describe('lmApiUrl', () => {
+  it('leaves root-absolute paths unchanged at the root', () => {
+    setPathname('/')
+
+    expect(lmApiUrl('/api/lm/loras/list')).toBe('/api/lm/loras/list')
+  })
+
+  it('prepends the subpath prefix to root-absolute paths', () => {
+    setPathname('/comfyui/')
+
+    expect(lmApiUrl('/api/lm/loras/list')).toBe('/comfyui/api/lm/loras/list')
+  })
+})