init

src/utils/obsidian.test.ts

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+import { TFile, TFolder } from 'obsidian'
+
+import { calculateFileDistance } from './obsidian'
+
+describe('calculateFileDistance', () => {
+	// Mock TFile class
+	class MockTFile {
+		path: string
+		constructor(path: string) {
+			this.path = path
+		}
+	}
+
+	it('should calculate the correct distance between files in the same folder', () => {
+		const file1 = new MockTFile('folder/file1.md') as TFile
+		const file2 = new MockTFile('folder/file2.md') as TFile
+
+		const result = calculateFileDistance(file1, file2)
+		expect(result).toBe(2)
+	})
+
+	it('should calculate the correct distance between files in different subfolders', () => {
+		const file1 = new MockTFile('folder1/folder2/file1.md') as TFile
+		const file2 = new MockTFile('folder1/folder3/file2.md') as TFile
+
+		const result = calculateFileDistance(file1, file2)
+		expect(result).toBe(4)
+	})
+
+	it('should return null for files in different top-level folders', () => {
+		const file1 = new MockTFile('folder1/file1.md') as TFile
+		const file2 = new MockTFile('folder2/file2.md') as TFile
+
+		const result = calculateFileDistance(file1, file2)
+		expect(result).toBeNull()
+	})
+
+	it('should handle files at different depths', () => {
+		const file1 = new MockTFile('folder1/folder2/subfolder/file1.md') as TFile
+		const file2 = new MockTFile('folder1/folder3/file2.md') as TFile
+
+		const result = calculateFileDistance(file1, file2)
+		expect(result).toBe(5)
+	})
+
+	it('should return 0 for the same file', () => {
+		const file = new MockTFile('folder/file.md') as TFile
+
+		const result = calculateFileDistance(file, file)
+		expect(result).toBe(0)
+	})
+
+	it('should calculate the correct distance between a folder and a file', () => {
+		const file = new MockTFile('folder1/folder2/file1.md') as TFile
+		const folder = new MockTFile('folder1/folder2') as TFolder
+
+		const result = calculateFileDistance(file, folder)
+		expect(result).toBe(1)
+	})
+})