ktlint/src/test/kotlin/com/github/shyiko/ktlint/internal/EditorConfigTest.kt

package com.github.shyiko.ktlint.internal

import com.google.common.jimfs.Configuration
import com.google.common.jimfs.Jimfs
import org.assertj.core.api.Assertions.assertThat
import org.testng.annotations.Test
import java.nio.file.Files

class EditorConfigTest {

    @Test
    fun testParentDirectoryFallback() {
        val fs = Jimfs.newFileSystem(Configuration.unix())
        Files.createDirectories(fs.getPath("/projects/project-1/project-1-subdirectory"))
        for (cfg in arrayOf(
            """
            [*]
            indent_size = 2
            """,
            """
            root = true
            [*]
            indent_size = 2
            """,
            """
            [*]
            indent_size = 4
            [*.{kt,kts}]
            indent_size = 2
            """,
            """
            [*.{kt,kts}]
            indent_size = 4
            [*]
            indent_size = 2
            """
        )) {
            Files.write(fs.getPath("/projects/project-1/.editorconfig"), cfg.trimIndent().toByteArray())
            val editorConfig = EditorConfig.of(fs.getPath("/projects/project-1/project-1-subdirectory"))
            assertThat(editorConfig?.parent).isNull()
            assertThat(editorConfig?.toMap())
                .overridingErrorMessage("Expected \n%s\nto yield indent_size = 2", cfg.trimIndent())
                .isEqualTo(mapOf("indent_size" to "2"))
        }
    }

    @Test
    fun testRootTermination() {
        val fs = Jimfs.newFileSystem(Configuration.unix())
        Files.createDirectories(fs.getPath("/projects/project-1/project-1-subdirectory"))
        Files.write(fs.getPath("/projects/.editorconfig"), """
            root = true
            [*]
            end_of_line = lf
        """.trimIndent().toByteArray())
        Files.write(fs.getPath("/projects/project-1/.editorconfig"), """
            root = true
            [*.{kt,kts}]
            indent_size = 4
            indent_style = space
        """.trimIndent().toByteArray())
        Files.write(fs.getPath("/projects/project-1/project-1-subdirectory/.editorconfig"), """
            [*]
            indent_size = 2
        """.trimIndent().toByteArray())
        EditorConfig.of(fs.getPath("/projects/project-1/project-1-subdirectory")).let { editorConfig ->
            assertThat(editorConfig?.parent).isNotNull()
            assertThat(editorConfig?.parent?.parent).isNull()
            assertThat(editorConfig?.toMap()).isEqualTo(mapOf(
                "indent_size" to "2",
                "indent_style" to "space"
            ))
        }
        EditorConfig.of(fs.getPath("/projects/project-1")).let { editorConfig ->
            assertThat(editorConfig?.parent).isNull()
            assertThat(editorConfig?.toMap()).isEqualTo(mapOf(
                "indent_size" to "4",
                "indent_style" to "space"
            ))
        }
        EditorConfig.of(fs.getPath("/projects")).let { editorConfig ->
            assertThat(editorConfig?.parent).isNull()
            assertThat(editorConfig?.toMap()).isEqualTo(mapOf(
                "end_of_line" to "lf"
            ))
        }
    }

    @Test
    fun testSectionParsing() {
        assertThat(EditorConfig.parseSection("*")).isEqualTo(listOf("*"))
        assertThat(EditorConfig.parseSection("*.{js,py}")).isEqualTo(listOf("*.js", "*.py"))
        assertThat(EditorConfig.parseSection("*.py")).isEqualTo(listOf("*.py"))
        assertThat(EditorConfig.parseSection("Makefile")).isEqualTo(listOf("Makefile"))
        assertThat(EditorConfig.parseSection("lib/**.js")).isEqualTo(listOf("lib/**.js"))
        assertThat(EditorConfig.parseSection("{package.json,.travis.yml}"))
            .isEqualTo(listOf("package.json", ".travis.yml"))
    }

    @Test
    fun testMalformedSectionParsing() {
        assertThat(EditorConfig.parseSection("")).isEqualTo(listOf(""))
        assertThat(EditorConfig.parseSection(",*")).isEqualTo(listOf("", "*"))
        assertThat(EditorConfig.parseSection("*,")).isEqualTo(listOf("*", ""))
        assertThat(EditorConfig.parseSection("*.{js,py")).isEqualTo(listOf("*.js", "*.py"))
        assertThat(EditorConfig.parseSection("*.{js,{py")).isEqualTo(listOf("*.js", "*.{py"))
        assertThat(EditorConfig.parseSection("*.py}")).isEqualTo(listOf("*.py}"))
    }
}