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99 changes: 99 additions & 0 deletions
99
generator/src/test/kotlin/io/outfoxx/sunday/test/extensions/DiffingExtension.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| /* | ||
| * Copyright 2020 Outfox, Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| package io.outfoxx.sunday.test.extensions | ||
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| import com.github.ajalt.mordant.markdown.Markdown | ||
| import com.github.ajalt.mordant.rendering.TextAlign.CENTER | ||
| import com.github.ajalt.mordant.rendering.TextColors.* | ||
| import com.github.ajalt.mordant.rendering.TextStyle | ||
| import com.github.ajalt.mordant.rendering.Whitespace | ||
| import com.github.ajalt.mordant.table.Borders | ||
| import com.github.ajalt.mordant.table.ColumnWidth | ||
| import com.github.ajalt.mordant.table.table | ||
| import com.github.ajalt.mordant.terminal.Terminal | ||
| import com.github.difflib.text.DiffRow | ||
| import com.github.difflib.text.DiffRowGenerator | ||
| import org.junit.jupiter.api.extension.ExtensionContext | ||
| import org.junit.jupiter.api.extension.TestExecutionExceptionHandler | ||
| import org.opentest4j.AssertionFailedError | ||
| import kotlin.math.max | ||
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| class DiffingExtension : TestExecutionExceptionHandler { | ||
|
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| private val differ: DiffRowGenerator = | ||
| DiffRowGenerator.create() | ||
| .lineNormalizer { it } | ||
| .build() | ||
| private val terminal = Terminal() | ||
|
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| override fun handleTestExecutionException(context: ExtensionContext, throwable: Throwable) { | ||
| if (throwable !is AssertionFailedError || !throwable.isStringMismatch()) { | ||
| throw throwable | ||
| } | ||
| val diff = | ||
| differ | ||
| .generateDiffRows( | ||
| throwable.expected.value.toString().split("\n"), | ||
| throwable.actual.value.toString().split("\n") | ||
| ) | ||
| val maxWidth = diff.maxOf { max(it.oldLine.length, it.newLine.length) } | ||
| terminal.println( | ||
| table { | ||
| style = TextStyle(color = white, bgColor = black, dim = true) | ||
| whitespace = Whitespace.PRE | ||
| borderStyle = TextStyle(color = white, bgColor = black, dim = true) | ||
|
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| header { | ||
| row { | ||
| cell("Expected") { align = CENTER } | ||
| cell("Actual") { align = CENTER } | ||
| } | ||
| } | ||
| body { | ||
| for ((idx, row) in diff.withIndex()) { | ||
| val (changeStyle, prefix) = | ||
| when (row.tag) { | ||
| DiffRow.Tag.INSERT -> TextStyle(color = green) to "+" | ||
| DiffRow.Tag.DELETE -> TextStyle(color = red) to row.oldLine.ifBlank { "-" } | ||
| DiffRow.Tag.CHANGE -> TextStyle(color = cyan) to "•" | ||
| null, DiffRow.Tag.EQUAL -> TextStyle(color = white, dim = true) to "" | ||
| } | ||
| row { | ||
| val borders = if (idx == diff.size - 1) Borders.LEFT_RIGHT_BOTTOM else Borders.LEFT_RIGHT | ||
| cell(row.oldLine.padEnd(maxWidth)) { | ||
| cellBorders = borders | ||
| } | ||
| cell(row.newLine.ifEmpty { prefix }.padEnd(maxWidth)) { | ||
| style = changeStyle | ||
| cellBorders = borders | ||
| } | ||
| } | ||
| } | ||
| // row { cells("", "") { cellBorders = Borders.LEFT_RIGHT_BOTTOM } } | ||
| } | ||
| } | ||
| ) | ||
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| throw throwable | ||
| } | ||
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| private fun AssertionFailedError.isStringMismatch(): Boolean = | ||
| isExpectedDefined && isActualDefined && | ||
| CharSequence::class.java.isAssignableFrom(expected.type) && CharSequence::class.java.isAssignableFrom(actual.type) | ||
|
|
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| } |
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