package com.example.aiapp

import kotlin.test.Test
import kotlin.test.assertEquals

class FilesNavigationTest {
    @Test
    fun `back walks through the common ancestor toward the project`() {
        val project = "/home/bob/repos/project"
        assertEquals("/", nextDirectoryToward("/etc", project))
        assertEquals("/home", nextDirectoryToward("/", project))
        assertEquals("/home/bob", nextDirectoryToward("/home", project))
        assertEquals("/home/bob/repos", nextDirectoryToward("/home/bob", project))
        assertEquals(project, nextDirectoryToward("/home/bob/repos", project))
        assertEquals(null, nextDirectoryToward(project, project))
    }

    @Test
    fun `back leaves a project descendant one directory at a time`() {
        assertEquals(
            "/home/bob/repos/project/src",
            nextDirectoryToward("/home/bob/repos/project/src/main", "/home/bob/repos/project"),
        )
    }

    @Test
    fun `paths inside the machine home use tilde notation`() {
        assertEquals("~", tildePath("/home/bob", "/home/bob"))
        assertEquals("~/repos/project", tildePath("/home/bob/repos/project", "/home/bob/"))
        assertEquals("/home/bobby/project", tildePath("/home/bobby/project", "/home/bob"))
        assertEquals("/etc", tildePath("/etc", "/home/bob"))
    }
}